Tele Vue 0.8x Reducer Adapter to 2 Inch Focuser

This is a key component to the imaging system's versatility on non-"is" scopes. By placing the Imaging System Nosepiece for 2" Focuser in your standard 2" drawtube, you open up your telescope to accept the 2.4" Imaging System accessories and take advantage of the solid threaded connection.

Tele Vue 0.8x Reducer/Flattener RFL-4087

TV-102 and TV-102is

Model FL-4087 Tele Vue 0.8x Reducer/flattener TV102 is a 0.8x Reducer/Flattener for TV-102 and TV-102is scopes and any 800-1000mm focal length refractor for imaging with up to 35mm camera formats. For TV-102 (non-"is") it requires the RAD-1074 Reducer Body Adapter for 2" focusers.

This reducer/flattener requires Imaging System camera adapter such as CWT-2070 (Canon Wide T-Adapter with Bayonet for 2.4" Focusers), STL-1071 (SBIG STL Camera Adapter), or TRG-1072 (Standard T-Ring Adapter) to connect to camera.

Looking for a corrector for the Tele Vue 101is/127is? Check out the Tele Vue Large Field Corrector.

Model TRF-2008 Tele Vue 0.8x Reducer/flattener 400-600mm converts TV-85 to 480mm f/5.6 and TV-76 to 380mm f/5.0 for flat field, fast photography. Fully multi-coated 3-element unit inserts directly into 2" focuser, accepts standard T-rings for 35mm cameras. Whilst designed for use in the TV-76 and TV-85, it can be used with other fast refractors between 400mm and 600mm focal length.

Used in prime-focus imaging, reducers increase photographic speed while flatteners decrease image curvature away from the center.

Important Note: The following products were all designed for an optimum 55mm back focus. (Distance from flange surface to film or CCD plane). If you use a CCD, be sure the spacing between flange and CCD is 56mm +/-2mm for best results.

"This accessory is a must-have for someone planning to use the TV-85 photographically" - review in Sky & Telescope, July 1999. Also it can be used with any 400-600mm refractor.

Tele Vue 2 - 1.25 Inch Adapter, HiHat

The "high-hat" adapter is specially designed with a high rise head to keep Tele Vue Barlows and Powermate™ amplifiers away from the diagonal mirror.

The Tele Vue 2”-1¼” Adapter - Satin, HiHat adapter is specially designed with a high rise head to keep Tele Vue Barlows and Powermate™ amplifiers away from the diagonal mirror. Has a Satin finish.

"Flat-top" model
A flat-top model allows closer placement of the eyepiece. Use with Newtonian reflectors, Tele Vue Paracorr, 2" Powermate, and 2" Big Barlow.

These adapters allows use of 1¼" eyepieces in any 2" focuser or diagonal.

All models feature brass clamp ring or nylon-tipped set screw for secure, no-mar locking and safety undercut.

Note: We purposely do not put 2" filter threads in 2" to 1¼" adapters. The reason is to avoid your getting upset when you insert a 1¼" Barlow and it crunches your expensive 2" filter. Safety first.

The Tele Vue EBX-2120 2" Eyepiece Barrel Extender increases backfocus distance and provides a mounting location for 2" (48mm) eyepiece filters. It can also help parfocalize eyepiece sets. Extender adds 1.2-inches to the 2" barrel.

Models with dual 2" / 1¼" barrels can use the extender.

The EBX-2120 makes the 12mm approximately parfocal with the 17mm and 22mm Nagler Type-4 eyepieces when used in a Tele Vue 2" diagonal.

Because the field stop is located near the bottom of the chrome eyepiece barrel, you will need to rack your focuser out further, relative to most other eyepieces. If you find that you cannot rack your focuser out enough to achieve focus, Tele Vue strongly recommend you purchase the EBX-2120. This will make Tele Vue's 55mm Plössl eyepiece approximately parfocal with the Tele Vue 27mm Panoptic eyepiece.

The Tele Vue 2x Barlow provides double the magnification when used with any 1.25" eyepiece in your collection. For more magnification check out the Tele Vue 3x Barlow.

The chart below shows the effective magnification when spacing is introduced between the Barlow lens and image plane of your camera or eyepiece

Properly designed Barlows do wonderful things: They amplify power, slow the telescope's f/# (improving eyepiece sharpness), and give designers the opportunity to compensate for eyepiece aberrations.

Tele Vue Barlows use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss. Observed performance is aberration free, even when tested with f/4 scopes. They even improve our competitor's eyepieces and telescopes!

Compromise image quality in any part of the optical chain and you've compromised every part! Tele Vue product design and execution deliver consummate satisfaction. Every Tele Vue Barlow must pass the same rigorous f/4, full field testing as all our eyepieces.

All Tele Vue Barlows now use brass clamp rings for secure, non marring holding of eyepieces and accessories.

Offered in 2x and 3x magnifications, these 1¼" Barlows perform identically. Simply choose either or both based on your eyepiece collection. Features include parfocal-ization, 1¼" filter threads, captive lock screws that won't fall out and full multicoatings.

These rings clamp onto your telescope to provide an attachment point for Tele Vue mounts. Felt lining on interior surface protects telescope finish. Rings include two mounting channels for Tele Vue finder accessories — such as Starbeam with Tele Vue base, Sol-Searcher, Piggy-Cam and others.

For TV-76, TV-85 or any telescope with outside tube diameter of exactly 3-inches. Finish matches focuser body and dew shield of current production telescopes.

Properly designed Barlows do wonderful things: They amplify power, slow the telescope's f/# (improving eyepiece sharpness), and give designers the opportunity to compensate for eyepiece aberrations.

Tele Vue Barlows use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss. Observed performance is aberration free, even when tested with f/4 scopes. They even improve our competitor's eyepieces and telescopes!

Compromise image quality in any part of the optical chain and you've compromised every part! Tele Vue product design and execution deliver consummate satisfaction. Every Tele Vue Barlow must pass the same rigorous f/4, full field testing as all our eyepieces.

All Tele Vue Barlows now use brass clamp rings for secure, non marring holding of eyepieces and accessories.

Offered in 2x and 3x magnifications, these 1¼" Barlows perform identically. Simply choose either or both based on your eyepiece collection. Features include parfocal-ization, 1¼" filter threads, captive lock screws that won't fall out and full multicoatings.

These rings clamp onto your telescope to provide an attachment point for Tele Vue mounts. Felt lining on interior surface protects telescope finish. Rings include two mounting channels for Tele Vue finder accessories — such as Starbeam with Tele Vue base, Sol-Searcher, Piggy-Cam and others.

For TV-102/(iis), TV-NP101/(is) or any telescope with outside tube diameter of exactly 4-inches. Finish matches focuser body and dew shield of current production telescopes.

Standard features of Tele Vue 60 OTA include a 2-stage 1.25" focuser with quick-focus drawtube, plus fine-focus helical, exquisitely machined and anodized all-metal construction, and a sliding captive dew shield. Offering wide field, pristine, color free views throughout a wide range of magnification.

• 1.25" focuser accept in-line Porro Prism, 45° erectors or 60° and 90° diagonals
• Maximum True Field: 4.3° (great for terrestrial and astronomical use)
• Maximum Power: 180x (with Nagler™ 2-4mm Zoom - for lunar/planetary viewing)
• Adjustable dovetail balancing bar fits all camera tripods, Tele Vue Mounts and new mounting brackets for SCT's

It’s a super-finder, day/night scope with great telephoto and imaging capability for digital cameras. Optional padded carry bag available.

Specifications

TVP-1250 Kit includes

QBT-1006 Tele Vue Quik Point Basic

DPC-1250 Tele Vue 1.25" 90° Everbrite Diagonal

TVB-2403 Tele Vue TV60 Carry Bag

EAD-25.0 Tele Vue 25mm Plossl

TVP-6012 Kit Includes

QBT-1006 Tele Vue Quik Point Basic

DPC-6012 Tele Vue 1.25" 60° Everbrite Diagonal

TVB-2403 Tele Vue TV60 Carry Bag

EAD-25.0 Tele Vue 25mm Plossl

Reviews

Tele Vue Adapter Vixen/Tele Vue
Allows telescopes with Tele Vue Ring Mounts or Tube Rings to be swapped between Tele Vue mounts and mounts with Vixen-style dovetail channels (used on Vixen Sphinx, GP and PORTA series mounts) without removal of the adapter. Also attaches to Coronado PST and Solarmax 40 telescopes.

TeleVue Barlows use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss.Observed performance is aberration free, even when tested with f/4 scopes.

They even improve non TeleVue eyepieces and telescope performance.

Compromise image quality in any part of the optical chain and you've compromised every part!

TeleVue product design and execution deliver consumate satisfaction.

Every TeleVue Barlow must pass the same rigorous f/4, full field testing as all TeleVue eyepieces.

Offered in a 2x magnification, the Big Barlow is ideal for Newtonian scope owners.

It will be parfocal with both 2" and 1 1/4" eyepieces in this application.

Features include threads for 48mm filters, captive lock screw and full milti-coatings.

Note: The Tele Vue 2x BIG Barlow is not recommended for use with 2" diagonals because it's length prevents it from being parfocal. With some telescopes, focus might not be reached, particularly when the Panoptic interface lens is also used with it. A far better approach with no potential problems in any scope or with any eyepieces is to use the 2" 2x Powermate (PMT-2200), which essentially includes the Pan-Barlow Interface

Tele Vue BIG Paracorr - Type 2 (3inch)

Tele Vue's 3" BIG Paracorr Type-2, designed by Paul Dellechiaie, extends the Paracorr type 2's optical benefits for imaging applications by amateurs and professionals using CCD formats as large as 52mm diagonal and paraboloids as fast as f/3. Back focal length has been extended to 80mm to allow for additional accessories to be placed in the optical path. The 5.1" length optical assembly is topped with a "stop" flange having 3.40"-24 pitch threads to mount camera adapters and spacer tubes (available later).

Paracorr Eats Coma

Paracorr can be used with both 2" and 1¼" eyepieces. For visual use, slip Paracorr Type-2 into your focuser like a Barlow lens, and your eyepiece into Paracorr. (3" BIG Paracorr Type-2 requires adapter and tunable top for visual use). 1¼" eyepieces will make use of Paracorr's special low profile 1¼" reducing adapter. Paracorr is threaded for 2" filters.

The Tele Vue DeLite 11mm is a versatile medium focal length eyepiece. Generally eyepieces in the 9-15mm focal length range are excellent all-rounders. The DeLite 11mm could well be an ideal choice as your main high quality eyepiece.

Available in 18.2, 15, 11, 9, 7 and 5mm focal lengths, the DeLite series is a delightful addition to Tele Vue's visionary line of eyepiece developments. Named DeLite because that best describes the viewing experience, the name also recognizes designer Paul Dellechiaie's work.

Tele Vue DeLite 11mm Specifications

Early reviews of the Tele Vue DeLite 62° Apparent Field Eyepieces

Tele Vue DeLite 13mm

The Tele Vue DeLite 13mm is one of the newest additions in the DeLite series. A perfect mid powered eyepiece with 20mm Eye relief it suits an observer who wears glasses, the locking eyeguard allows you to set the position perfectly for your eyes. 62 degrees apparent field of view and sharp from edge to edge, Blackened edges and threaded for filters will make this a favourite in any collection.

Available in 18.2, 15, NEW 13mm, 11, 9, 7, 5mm 4mm and 3mm focal lengths, the DeLite series is a delightful addition to Tele Vue’s visionary line of eyepiece developments. Named DeLite because that best describes the viewing experience, the name also recognizes designer Paul Dellechiaie’s work. The Tele Vue DeLite 13mm is a great mid focal length and would be a great choice for lunar observing also great for galaxies, smaller open and globular clusters.

Specifications

Read the Sky and Telescope Review by Dennis di Cicco

The Tele Vue DeLite 15mm is one of the 3 newest additions in the DeLite series. Revealed at the NEAF conference in April 2016 the Tele Vue DeLite 15mm is sure to become a favourite in any eyepiece collection.

Available in 18.2, 15, 11, 9, 7 and 5mm focal lengths, the DeLite series is a delightful addition to Tele Vue's visionary line of eyepiece developments. Named DeLite because that best describes the viewing experience, the name also recognizes designer Paul Dellechiaie's work.

Tele Vue DeLite 15mm Specifications

Early reviews of the Tele Vue DeLite 62° Apparent Field Eyepieces

The Tele Vue DeLite 18.2mm was one of the first in the DeLite series. It is the lowest power member and is an absolutely stunning eyepiece. If you are looking for a superb medium to low powered eyepiece on a moderate budget, the Tele Vue Delite 18.2mm would be an excellent choice.

Available in 18.2, 15, 11, 9, 7 and 5mm focal lengths, the DeLite series is a delightful addition to Tele Vue's visionary line of eyepiece developments. Named DeLite because that best describes the viewing experience, the name also recognises designer Paul Dellechiaie's work.

Tele Vue DeLite 18.2mm Specifications

Reviews

The Tele Vue DeLite 3mm is one of the newest additions in the DeLite series. Announced in November 2016 it is sure to become a favourite in any eyepiece collection.

Available in 18.2, 15, NEW 13mm, 11, 9, 7, 5mm 4mm and 3mm focal lengths, the DeLite series is a delightful addition to Tele Vue’s visionary line of eyepiece developments. Named DeLite because that best describes the viewing experience, the name also recognizes designer Paul Dellechiaie’s work.

The Tele Vue DeLite 3mm is the shortest focal length available in the series and would be a great choice for planetary and lunar observing.

A perfect eyepiece for faster focal lengths and the 20mm eye relief means you can wear your glasses if you have to. Threaded to take 1.25" filters

Specifications

Read the Sky and Telescope Review by Dennis di Cicco

Tele Vue DeLite 4mm

With 20mm eye relief the Tele Vue Delite 4mm is the perfect Planetary and Lunar eyepiece. At 216grams it will not cause balance problems in any scope. Best used in faster (f/4- f/6) scopes due to exit pupil. Edge blackened with 62 degrees apparent field, sliding, locking eyeguard to get best eye position for your eye.

Just as Delos eyepieces were developed based on Tele Vue's Ethos eyepiece design advancements, DeLite is the logical step toward a smaller, more economical and lightweight version of Delos. The 62° apparent field DeLite retains the pure optical quality of Delos along with 20mm eye-relief, unique sliding, locking eyeguard, and is Dioptrx-ready.

Specifications:

Delos Series are Available in 18.2, 15, NEW 13mm, 11, 9, 7, 5mm 4mm and 3mm focal lengths, the DeLite series is a delightful addition to Tele Vue’s visionary line of eyepiece developments. Named DeLite because that best describes the viewing experience, the name also recognizes designer Paul Dellechiaie’s work. The Tele Vue DeLite 4mm is a great choice for planetary and lunar observing.

Review by Dennis di Cicco from Sky and Telescope

The Tele Vue DeLite 5mm is one of the 3 newest additions in the DeLite series. Revealed at the NEAF conference in April 2016 the Tele Vue DeLite 5mm is sure to become a favourite in any eyepiece collection.

Available in 18.2, 15, 11, 9, 7 and 5mm focal lengths, the DeLite series is a delightful addition to Tele Vue's visionary line of eyepiece developments. Named DeLite because that best describes the viewing experience, the name also recognizes designer Paul Dellechiaie's work. The Tele Vue DeLite 5mm is the shortest focal length available in the series and would be a great choice for planetary and lunar observing.

Tele Vue DeLite 5mm Specifications

Early reviews of the Tele Vue DeLite 62° Apparent Field Eyepieces

Like any Tele Vue eyepiece, the Tele Vue DeLite 7mm produces images rich in detail and popping with contrast. The Tele Vue DeLite 7mm would make a great higher powered eyepiece in most cassegrain telescopes. With a generous 62° AFOV and 20mm eye-relief the viewing experience will be very comfortable.

Available in 18.2, 15, 11, 9, 7 and 5mm focal lengths, the DeLite series is a delightful addition to Tele Vue's visionary line of eyepiece developments. Named DeLite because that best describes the viewing experience, the name also recognises designer Paul Dellechiaie's work.

Tele Vue DeLite 7mm Specifications

Reviews

The Tele Vue DeLite 9mm is one of the 3 newest additions in the DeLite series. Revealed at the NEAF conference in April 2016 the Tele Vue DeLite 9mm is sure to become a favourite in any eyepiece collection.

Available in 18.2, 15, 11, 9, 7 and 5mm focal lengths, the DeLite series is a delightful addition to Tele Vue's visionary line of eyepiece developments. Named DeLite because that best describes the viewing experience, the name also recognizes designer Paul Dellechiaie's work.

Tele Vue DeLite 9mm Specifications

Early reviews of the Tele Vue DeLite 62° Apparent Field Eyepieces

Excerpt from Tom Trusock's March 2016 review in Astronomy magazine.

Tele Vue's Delos 10mm is a short to medium focal length eyepiece that will deliver amazing detail. Importantly though it still achieves a generous 20mm eye-relief and wide 72° apparent field of view. Amazing in well corrected refractors with short to medium focal lengths. The Delos 10mm is suitable for any focal length telescope. Some of the shorter focal length Delos eyepieces may provide too much power in long focal length Cassegrains. For example in an 8" f/10 telescope the 10mm Delos provides 200x magnification with eye-relief galore!

There is a good chance the TeleVue Delos will be seen as the ultimate combination of performance, viewing comfort and price. If you've been keeping a spot in your case for an affordable, premium eyepiece, you should consider a Delos - you won't be disappointed! Lessons learned from the tremendously successful Ethos series were applied to develop this long eye-relief, 72° apparent field of view eyepiece line.

The Delos 10mm for a standard 1.25" barrel diameter making it suitable for almost any telescope or even bino-viewers!

Tele Vue Delos 10mm - Specifications

• Model # EDL-10.0
• Focal Length 10mm
• Barrel Size 1.25"
• Apparent Field of View 72°
• Eye Relief 20mm
• Weight 408g
• Field Stop 12.7mm

Background:

In 2011 Tele Vue introduced the Delos, mid-to-short focal length line of 20mm eye-relief, 72° apparent field of view eyepieces. Every optical, mechanical, and ergonomic aspect was rethought to achieve reference-standard performance for any visual application.

The Delos was conceived as a narrower field Ethos. Reducing the field to 72° allowed freedom to increase eye-relief, while controlling pupil aberrations, all without making the eyepiece too large. With Ethos performance standards as benchmarks, the Delos design achieves full field sharpness, virtually perfect f θ (theta) distortion mapping, and color neutrality. Image fidelity is maximized utilizing glass matched multicoatings and anti-reflection surfaces throughout the eyepiece.

Contrast is further enhanced with a new, continuously adjustable height eyeguard system that can be locked in any position. Since the Delos eye-lens measures a quite large 35mm in diameter, preventing stray light from reflecting off the first surface and extraneous light from entering your eye pays off in a nice increase in perceived contrast. The eyeguard's sliding action allows for positioning the soft rubber eyeguard at the ideal height to suit the observer's preference. Indicator marks on the eyepiece body are handy reference guides for setting your perfect position. The eye-guard can also rotate for Dioptrx users.

Awards - Delos 6mm and 10mm

Reviews

Sky & Telescope Hot New Product for 2012 Award

Review of the 6mm & 10mm Delos from Astronomy Magazine, December 2011

Excerpts from Sky & Telescope, June 2011, review of Delos eyepieces:

WHAT WE LIKE:

Essentially perfect optics
"Immersive" observation experience

WHAT WE DON'T LIKE:

I spent several nights viewing the Moon, Saturn, stars and nebulae with a variety of telescopes … .

The Delos eyepieces are "easy to look through … . They have flat fields, delivering absolute pinpoint stars from edge to edge with no hint of color aberration. The view, especially during the daytime, is very pure with no noticeable color tint. And there wasn't a hint of ghosts or reflections, even with the brightest stars".

"What caught me a bit off guard, however, was something that's best described as the observing experience. It was distinctly pleasurable."

"I have the sensation of looking out of a circular window rather than into an eyepiece."

— di Cicco, Dennis. "Tele Vue's New Delos Eyepieces". Sky & Telescope (June 2011). p. 58, 59.

Tele Vue's Delos 12mm is a medium focal length eyepiece that creates an "immersive viewing experience". With its generous 20mm eye-relief and wide 72° apparent field of view you will be hard pressed to find another eyepiece that is such a pleasure to look through. Amazing wide fields of view in well corrected refractors with short to medium focal lengths (over 1° FOV up to 800mm focal length). While some of the shorter focal length Delos eyepieces may provide too much power in long focal length Cassegrains, the Delos 12mm is suitable for any focal length telescope.

There is a good chance the TeleVue Delos will be seen as the ultimate combination of performance, viewing comfort and price. If you've been keeping a spot in your case for an affordable, premium eyepiece, you should consider a Delos - you won't be disappointed! Lessons learned from the tremendously successful Ethos series were applied to develop this long eye-relief, 72° apparent field of view eyepiece line.

The Delos 12mm has a 1.25" barrel making it suitable for almost any telescope or even bino-viewers!

Tele Vue Delos 12mm - Specifications

• Model # EDL-12.0
• Focal Length 12mm
• Barrel Size 1.25"
• Apparent Field of View 72°
• Eye Relief 20mm
• Weight 408g
• Field Stop 15.0mm

Background:

In 2011 Tele Vue introduced the Delos, mid-to-short focal length line of 20mm eye-relief, 72° apparent field of view eyepieces. Every optical, mechanical, and ergonomic aspect was rethought to achieve reference-standard performance for any visual application.

The Delos was conceived as a narrower field Ethos. Reducing the field to 72° allowed freedom to increase eye-relief, while controlling pupil aberrations, all without making the eyepiece too large. With Ethos performance standards as benchmarks, the Delos design achieves full field sharpness, virtually perfect f θ (theta) distortion mapping, and color neutrality. Image fidelity is maximized utilizing glass matched multicoatings and anti-reflection surfaces throughout the eyepiece.

Contrast is further enhanced with a new, continuously adjustable height eyeguard system that can be locked in any position. Since the Delos eye-lens measures a quite large 35mm in diameter, preventing stray light from reflecting off the first surface and extraneous light from entering your eye pays off in a nice increase in perceived contrast. The eyeguard's sliding action allows for positioning the soft rubber eyeguard at the ideal height to suit the observer's preference. Indicator marks on the eyepiece body are handy reference guides for setting your perfect position. The eye-guard can also rotate for Dioptrx users.

Awards - Delos 6mm and 10mm

Reviews

Sky & Telescope Hot New Product for 2012 Award

Review of the 6mm & 10mm Delos from Astronomy Magazine, December 2011

Excerpts from Sky & Telescope, June 2011, review of Delos eyepieces:

WHAT WE LIKE:

Essentially perfect optics
"Immersive" observation experience

WHAT WE DON'T LIKE:

I spent several nights viewing the Moon, Saturn, stars and nebulae with a variety of telescopes … .

The Delos eyepieces are "easy to look through … . They have flat fields, delivering absolute pinpoint stars from edge to edge with no hint of color aberration. The view, especially during the daytime, is very pure with no noticeable color tint. And there wasn't a hint of ghosts or reflections, even with the brightest stars".

"What caught me a bit off guard, however, was something that's best described as the observing experience. It was distinctly pleasurable."

"I have the sensation of looking out of a circular window rather than into an eyepiece."

— di Cicco, Dennis. "Tele Vue's New Delos Eyepieces". Sky & Telescope (June 2011). p. 58, 59.

Tele Vue's Delos 14mm is a medium focal length eyepiece that creates an “immersive viewing experience”. With its generous 20mm eye-relief and wide 72° apparent field of view you will be hard pressed to find another eyepiece that is such a pleasure to look through. Amazing wide fields of view in well corrected refractors with short to medium focal lengths (over 1° FOV up to 1000mm focal length). While some of the shorter focal length Delos eyepieces may provide too much power in long focal length Cassegrains, the Delos 14mm is suitable for any focal length telescope.

There is a good chance the TeleVue Delos will be seen as the ultimate combination of performance, viewing comfort and price. If you've been keeping a spot in your case for an affordable, premium eyepiece, you should consider a Delos - you won't be disappointed! Lessons learned from the tremendously successful Ethos series were applied to develop this long eye-relief, 72° apparent field of view eyepiece line.

The Delos 14mm has standard a 1.25" barrel making it suitable for almost any telescope or even bino-viewers!

Tele Vue Delos 14mm - Specifications

• Model # EDL-14.0
• Focal Length 14mm
• Barrel Size 1.25"
• Apparent Field of View 72°
• Eye Relief 20mm
• Weight 408g
• Field Stop 17.3mm

Background:

In 2011 Tele Vue introduced the Delos, mid-to-short focal length line of 20mm eye-relief, 72° apparent field of view eyepieces. Every optical, mechanical, and ergonomic aspect was rethought to achieve reference-standard performance for any visual application.

The Delos was conceived as a narrower field Ethos. Reducing the field to 72° allowed freedom to increase eye-relief, while controlling pupil aberrations, all without making the eyepiece too large. With Ethos performance standards as benchmarks, the Delos design achieves full field sharpness, virtually perfect f θ (theta) distortion mapping, and color neutrality. Image fidelity is maximized utilizing glass matched multicoatings and anti-reflection surfaces throughout the eyepiece.

Contrast is further enhanced with a new, continuously adjustable height eyeguard system that can be locked in any position. Since the Delos eye-lens measures a quite large 35mm in diameter, preventing stray light from reflecting off the first surface and extraneous light from entering your eye pays off in a nice increase in perceived contrast. The eyeguard's sliding action allows for positioning the soft rubber eyeguard at the ideal height to suit the observer's preference. Indicator marks on the eyepiece body are handy reference guides for setting your perfect position. The eye-guard can also rotate for Dioptrx users.

Awards - Delos 6mm and 10mm

Reviews

Sky & Telescope Hot New Product for 2012 Award

Review of the 6mm & 10mm Delos from Astronomy Magazine, December 2011

Excerpts from Sky & Telescope, June 2011, review of Delos eyepieces:

WHAT WE LIKE:

Essentially perfect optics
"Immersive" observation experience

WHAT WE DON'T LIKE:

I spent several nights viewing the Moon, Saturn, stars and nebulae with a variety of telescopes … .

The Delos eyepieces are "easy to look through … . They have flat fields, delivering absolute pinpoint stars from edge to edge with no hint of color aberration. The view, especially during the daytime, is very pure with no noticeable color tint. And there wasn't a hint of ghosts or reflections, even with the brightest stars".

"What caught me a bit off guard, however, was something that's best described as the observing experience. It was distinctly pleasurable."

"I have the sensation of looking out of a circular window rather than into an eyepiece."

— di Cicco, Dennis. "Tele Vue's New Delos Eyepieces". Sky & Telescope (June 2011). p. 58, 59.

Tele Vue's Delos 17.3mm is the longest focal length in the Delos series. Still with a generous 20mm eye-relief and wide 72° apparent field of view you will enjoy an emmersive viewing experience that is hard to match. The optimized combination of field size and eye-relief makes Delos an eyeglass wearers dream!

There is a good chance the TeleVue Delos will be seen as the ultimate combination of performance, viewing comfort and price. If you've been keeping a spot in your case for an affordable, premium eyepiece, you should consider a Delos 17.3mm - it won't disappoint! Lessons learned from the tremendously successful Ethos series were applied to develop this long eye-relief, 72° apparent field of view eyepiece line.

The Delos 17.3mm has a standard 1.25" barrel making it suitable for almost any telescope. An excellent choice for low power viewing in bino-viewers!

Tele Vue Delos 17.3mm - Specifications

• Model # EDL-17.3
• Focal Length 17.3mm
• Barrel Size 1.25"
• Apparent Field of View 72°
• Eye Relief 20mm
• Weight 408g
• Field Stop 21.2mm

Background

Tele Vue introduced the Delos In 2011. The series includes mid-to-short focal lengths with all providing 20mm eye-relief and 72° apparent field of view. Tele Vue designer Paul Dellechiaie rethought every optical, mechanical, and ergonomic aspect to achieve reference-standard performance for any visual application.

The Delos was conceived as a narrower field Ethos. Eye-relief was increased while still controlling pupil aberrations by reducing the field to 72°. This was achieved without making the eyepiece too large. With Ethos performance standards as benchmarks, the Delos design achieves full field sharpness, virtually perfect f θ (theta) distortion mapping, and colour neutrality. Image fidelity is maximized utilizing glass matched multicoatings and anti-reflection surfaces throughout the eyepiece.

Contrast is further enhanced with a new, continuously adjustable height eyeguard system that can be locked in any position. Since the Delos eye-lens measures a quite large 35mm in diameter, preventing stray light from reflecting off the first surface and extraneous light from entering your eye pays off in a nice increase in perceived contrast. The eyeguard's sliding action allows for positioning the soft rubber eyeguard at the ideal height to suit the observer's preference. Indicator marks on the eyepiece body are handy reference guides for setting your perfect position. The eye-guard can also rotate for Dioptrx users.

Awards

Delos 6- & 10-mm

Delos Eyepieces Reviews

Quotes from review of 10mm, 4.5mm, & 14mm Delos on Alpha Lyrae website.

• The stunningly flat field and lack of optical aberrations really allow clusters to shine and galaxies and nebulae are resplendent.
• It is rare I use any other eyepiece for deep sky observing anymore.

• Quite simply, the planetary performance matches the very best dedicated planetary eyepieces I have ever used such as the TMB Super Monocentric.
• There is also an indescribable quality which makes them a very easy and relaxing eyepiece to use.

— Hodgson, Matthew. "Televue Delos Eyepiece Review". Alpha Lyrae (05 May 2014). Full Review.

Excerpt from Delos 17.3mm review in Astronomy Now magazine.

Examining the stars of the Pleiades served up by the 17.3mm Delos, I was immediately struck by the pinpoint star images right to the edge of the field-of-view. Contrast was superb. Nor could I detect any signs of off-axis distortions.

— Neil English. "Tele Vue Delos". Astronomy Now (April 2013). Read Full Review (Delos 6-,10- & 17.3-mm) now.

Sky & Telescope Hot New Product for 2012 Award

More Than Expected (Delos 6- and 10-mm)

And while the 20 mm of eye relief make them attractive for those who observe wearing eyeglasses, it was the "distinctly pleasurable" observing experience that most impressed our reviewer. When it comes to eyepiece design, The Delos seems to have hit all the sweet spots.

— Editors. "Hot New Products for 2012". Sky & Telescope (January 2012). p.39.

Excerpt from ATT review of Delos 6- & 10-mm eyepieces:

Wide-Field Eyepieces That Pack a Planetary Punch

With the Delos, the eyepiece simply "disappears" and allows the observer to observe. I could find nothing whatsoever to complain about; the "twist and tighten" eye relief adjustment feature is the best I've ever seen in any eyepiece, and the optics are essentially perfect. Tele Vue somehow always finds a way to continuously improve upon their eyepieces and the Delos is certainly no exception. Bottomline: If you're in the market for a planetary eyepiece, you owe it to yourself to consider the Tele Vue Delos.

— Erik Wilcox. "Tele Vue Delos". Astronomy Technology Today (Nov-Dec 2011). Full Review.

Review of the 6mm & 10mm Delos Eyepieces from Astronomy Magazine, December 2011

• Contrast was excellent - right up there with some of the best planetary eyepieces I've ever used.
• I searched but saw no internal reflections or scattering in either eyepiece.
• The flat field the Delos eyepieces produce really made star fields pop. Open clusters epitomized the old standard "diamonds on velvet". Stars on and off axis showed no sign of astigmatism.
• Tele Vue has constructed an eyepiece that stands with the best deep-sky and planetary eyepieces on the market.

— Trusock, Tom. "Astronomy tests Tele Vue's new eyepiece line". Astronomy Magazine (December 2011). Full Review.

Excerpts from Sky & Telescope, June 2011, review of Delos eyepieces:

WHAT WE LIKE:

Essentially perfect optics
"Immersive" observation experience

WHAT WE DON'T LIKE:

Trying to nail down why the observing experience is so pleasurable.

I spent several nights viewing the Moon, Saturn, stars and nebulae with a variety of telescopes … .

The Delos eyepieces are "easy to look through … . They have flat fields, delivering absolute pinpoint stars from edge to edge with no hint of color aberration. The view, especially during the daytime, is very pure with no noticeable color tint. And there wasn't a hint of ghosts or reflections, even with the brightest stars".

"What caught me a bit off guard, however, was something that's best described as the observing experience. It was distinctly pleasurable."

"I have the sensation of looking out of a circular window rather than into an eyepiece."

— di Cicco, Dennis. "Tele Vue's New Delos Eyepieces". Sky & Telescope (June 2011). p. 58, 59.