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Bintel Glebe
Usually ready for pickup in 24 hours
Bintel 84 Wentworth park road, Glebe, 2073, NSW
Phone:(02) 9518 7255
Hours:
Monday9:30 am–5:30 pm
Tuesday9:30 am–5:30 pm
Wednesday9:30 am–5:30 pm
Thursday9:30 am–5:30 pm
Friday9:30 am–5:30 pm
Saturday9:30 am–4 pm
SundayClosed
Nagler
13 products
13 products
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$1,510.00
Nagler Type 5
With the 31mm, the unique 6-element design using four exotic glasses, maintains the contrast advancement of the Type 4s while achieving a true field area 82% larger than the 22mm Type 4!
Owners of fast Dobsonian/Newtonians can enjoy a larger true field, free of secondary shadowing, than ever before. For example, a 12.5", f/4.5 scope with a Paracorr will deliver a 1.5 degree field (3 Moon diameters), at 53x with a 6mm exit pupil.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
Specifications
| Focal Length (mm) | 31 |
| Barrel Size (in.) | 2" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 19 |
| Weight (lb / oz) | 2.20 / 35.2 |
| Field Stop (mm) | 42 |
$750.00
Nagler Type 6
The 7-element, Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design update for the short focal length Nagler deserves its own designation. Using different exotic materials, coating processes and design ingenuity, Al has massaged more eye-relief, contrast, and true field of view into the shorter focal length Naglers, while maintaining the absolute sharpness of the originals. Eye-relief is 12mm on each model, and all are sized about the same as the original 7mm! Weight about 0.4 to 0.5 lbs.
Concept: The goal we set designing these new eyepieces was to increase contrast, maintain or increase eye-relief, reduce size and weight, and maintain the sharpness of the originals. They are all parfocal and great with the Bino Vue.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
Specifications
| Focal Length (mm) | 13 |
| Barrel Size (in.) | 1¼" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 12 |
| Weight (lb / oz) | 0.40 / 6.4 |
| Field Stop (mm) | 17.6 |
$910.00
The Nagler eyepiece was revolutionary as the first eyepiece to deliver breath taking wide fields of view while still providing sharp images from edge to edge. In contrast to the objective of your telescope which rarely covers an image angle of more than 2°, Nagler eyepieces remain sharp over an angle of 82° to truly inspire a spacewalk vista. For this reason extreme care must be taken to correct for aberrations - especially away from the optical axis.
Al Nagler has refined this series of eyepieces taking advantage of different exotic glasses and improved coatings to deliver quite simply the best performance you can get out of an eyepiece. While other manufacturers may boast impressive field sizes, Tele Vue's philosophy of inspiring spacewalk vistas always keeps their optical devices well ahead of the pack.
Specifications
| Focal Length (mm) | 6-Mar |
| Barrel Size (in.) | 1¼" |
| Apparent Field of View (deg.) | 50 |
| Eye Relief (mm) | 10 |
| Weight (lb / oz) | 0.33 / 5.3 |
| Field Stop (mm) | 5.1 - 2.6 |
$750.00
Nagler Type 6
The 7-element, Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design update for the short focal length Nagler deserves its own designation. Using different exotic materials, coating processes and design ingenuity, Al has massaged more eye-relief, contrast, and true field of view into the shorter focal length Naglers, while maintaining the absolute sharpness of the originals. Eye-relief is 12mm on each model, and all are sized about the same as the original 7mm! Weight about 0.4 to 0.5 lbs.
Concept: The goal we set designing these new eyepieces was to increase contrast, maintain or increase eye-relief, reduce size and weight, and maintain the sharpness of the originals. They are all parfocal and great with the Bino Vue.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
Specifications
| Focal Length (mm) | 9 |
| Barrel Size (in.) | 1¼" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 12 |
| Weight (lb / oz) | 0.42 / 6.7 |
| Field Stop (mm) | 12.4 |
$750.00
Nagler Type 6
The 7-element, Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design update for the short focal length Nagler deserves its own designation. Using different exotic materials, coating processes and design ingenuity, Al has massaged more eye-relief, contrast, and true field of view into the shorter focal length Naglers, while maintaining the absolute sharpness of the originals. Eye-relief is 12mm on each model, and all are sized about the same as the original 7mm! Weight about 0.4 to 0.5 lbs.
Concept: The goal we set designing these new eyepieces was to increase contrast, maintain or increase eye-relief, reduce size and weight, and maintain the sharpness of the originals. They are all parfocal and great with the Bino Vue.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
Specifications
| Focal Length (mm) | 5 |
| Barrel Size (in.) | 1¼" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 12 |
| Weight (lb / oz) | 0.49 / 7.9 |
| Field Stop (mm) | 7 |
$1,070.00
The Nagler eyepiece was revolutionary as the first eyepiece to deliver breath taking wide fields of view while still providing sharp images from edge to edge.
The eyepiece is an extremely important, but often over looked element in the image your telescope delivers.
In contrast to the objective of your telescope which rarely covers an image angle of more than 2°, the eyepiece has to remain sharp over an angle of more than 50°...or a staggering 82° in the case of the Nagler. For this reason extreme care must be taken to correct for aberrations - especially away from the optical axis.
Astigmatism and field curvature are 2 factors that most influence the off axis sharpness especially in "fast" objectives (below f/6). Eyepiece designers had tried for many years to eliminate these aberrations but it was not until the 1980s that a breakthrough occurred - the Nagler eyepiece.
Since then Al Nagler has refined this series of eyepieces taking advantage of different exotic glasses and improved coatings to deliver quite simply the best performance you can get out of an eyepiece. While other manufacturers may boast impressive field sizes, Televue's philosophy of "showing no field unless it is fine" stresses full field image quality as the ingredient for impressive views.
Tele Vue Nagler 22 Specifications
| Focal Length (mm) | 22 |
| Barrel Size (in.) | 2" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 19 |
| Weight (lb / oz) | 1.50 / 24.0 |
| Field Stop (mm) | 31.1 |
Compare a penny to a half dollar to see the relative size between a 50° and 82° apparent field - almost 3 times the area difference! And while others boast of impressive apparent field sizes, Tele Vue's philosophy of "showing no field unless it's fine" stresses full field image quality as the ingredient for impressive views. Blackened lens edges, anti-reflection threads and rubber eyeguards deliver maximum contrast. Adapter skirts for 2" focusers on larger 1¼" models and rubber grip rings are additional Tele Vue "firsts". Even 2"/1¼" barrel models have an additional feature allowing the 2" extension tube (EBX-2120) to be screwed on, which permits use of 2" filters as well as 1¼". 100% full field visual inspection on our own flat-field test instruments guarantees the performance of every Tele Vue eyepiece.
Review
The TeleVue 22mm Nagler Type 4 is another of the newer improved Naglers.
The 19mm of eye relief as well as TeleVue's "Instadjust" click-stop adjustable-height eyeguard with a soft fold-down rubber eyecup allows for eyeglass wearers to experience a full 82° apparent field of view when fully retracted. The click stop increments of "Instadjust" allows non eyeglass wearer to find the exact height for full field of view images. A small plastic insert that fits in the eyeguard allows non eyeglass wearers to find the correct position of the exit pupil.
In big, fast Dobs this is an amazing medium-low power eyepiece great for open clusters, galaxy clusters and emission nebulae. Eta Carinae is totally awesome in this eyepiece.
In SCT's it offers 2.2mm exit pupil making images very bright and this is ideal for open and globular clusters. Have a look at the Tarantula Nebulae to be convinced how good this eyepiece is.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
$750.00
Nagler Type 6
The 7-element, Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design update for the short focal length Nagler deserves its own designation. Using different exotic materials, coating processes and design ingenuity, Al has massaged more eye-relief, contrast, and true field of view into the shorter focal length Naglers, while maintaining the absolute sharpness of the originals. Eye-relief is 12mm on each model, and all are sized about the same as the original 7mm! Weight about 0.4 to 0.5 lbs.
Concept: The goal we set designing these new eyepieces was to increase contrast, maintain or increase eye-relief, reduce size and weight, and maintain the sharpness of the originals. They are all parfocal and great with the Bino Vue.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
Specifications
| Focal Length (mm) | 7 |
| Barrel Size (in.) | 1¼" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 12 |
| Weight (lb / oz) | 0.50 / 8.0 |
| Field Stop (mm) | 9.7 |
$820.00
Nagler Type 5
With the 31mm, the unique 6-element design using four exotic glasses, maintains the contrast advancement of the Type 4s while achieving a true field area 82% larger than the 22mm Type 4!
Owners of fast Dobsonian/Newtonians can enjoy a larger true field, free of secondary shadowing, than ever before. For example, a 12.5", f/4.5 scope with a Paracorr will deliver a 1.5 degree field (3 Moon diameters), at 53x with a 6mm exit pupil.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
Specifications
| Focal Length (mm) | 16 |
| Barrel Size (in.) | 1¼" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 10 |
| Weight (lb / oz) | 0.44 / 7.1 |
| Field Stop (mm) | 22.1 |
$750.00
The 3.5mm Nagler Type 6 is a natural progression of 1.4x power steps from 7mm and 5mm Naglers. You don't have to sacrifice field in order to gain sharpness and power. And, you're not limited to slow scopes, or have to squint through tiny eye lenses. These are the lunar and "planetary" eyepieces with field to spare.
Nagler Type 6
The 7-element, Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design update for the short focal length Nagler deserves its own designation. Using different exotic materials, coating processes and design ingenuity, Al has massaged more eye-relief, contrast, and true field of view into the shorter focal length Naglers, while maintaining the absolute sharpness of the originals. Eye-relief is 12mm on each model, and all are sized about the same as the original 7mm! Weight about 0.4 to 0.5 lbs.
Concept: The goal we set designing these new eyepieces was to increase contrast, maintain or increase eye-relief, reduce size and weight, and maintain the sharpness of the originals. They are all parfocal and great with the Bino Vue.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
Specifications
| Focal Length (mm) | 3.5 |
| Barrel Size (in.) | 1¼" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 12 |
| Weight (lb / oz) | 0.53 / 8.5 |
| Field Stop (mm) | 4.8 |
$1,310.00
Concept The Nagler Type 7 series was developed as a natural extension of our highly regarded, 85°, limited edition Apollo 11 eyepiece. However, the series can also be thought of as an extension of the long eye relief Nagler Type 4 concept. With the all-new Type 7 design layout, we achieved our goal of Apollo 11-like performance across a series of focal lengths that are eyeglass friendly.
Design Goals The design goal was simple. The performance of each of the Type 7 focal lengths must equal or exceed that of the Apollo 11 eyepiece in the areas of full-field sharpness, contrast, distortion correction, eye relief, and pupil comfort, but across an 82° apparent field of view instead of 85°.
Design Details If you have been waiting for a Nagler series for eyeglass wearers, the Type 7 is it. Combining the expansive 82° apparent field of view with 19 mm of eyeglass friendly eye relief, and large eyelens, the Nagler Type 7s give a new dimension to the "spacewalk" viewing effect. An easily adjustable, locking eye-guard is included for those who don't wear eyeglasses. It helps to correctly position your eye to the exit pupil so you don't get too close to the eyelens, as well as blocks contrast-robbing stray light from interfering with the view. Speaking of which, of course we've applied all the optical coating and baffling features Tele Vue eyepieces are known to maximize contrast and complement the fully corrected field; revealing beautifully natural star colors with pinpoint sharpness. The optical layout affords unrivalled parfocality throughout the four focal lengths and even between 1¼" and 2" modes when used with the Tele Vue Hi-Hat 1¼" and 2" adapter (ASF-8125). The Type 7 series is also parfocal with all other 1¼" Tele Vue eyepieces (except 40 mm Plössl) when those eyepieces are used in the Tele Vue Hi-Hat 1¼" and 2" adapter (ASF-8125). Available in focal lengths of 5.5, 9, 14, and 19-mm, the Type 7s complement the 22-mm Type 4 and 31 mm Type 5 as eyeglass friendly Naglers.
The Nagler Type 7 models all weight 19 to 21 oz / 540 to 590 gm.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
Specifications
| Focal Length (mm) | 19 |
| Barrel Size (in.) | 2" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 19 |
| Weight (lb / oz) | 1.28 / 20.5 |
| Field Stop (mm) | 27.1 |
$1,310.00
Concept The Nagler Type 7 series was developed as a natural extension of our highly regarded, 85°, limited edition Apollo 11 eyepiece. However, the series can also be thought of as an extension of the long eye relief Nagler Type 4 concept. With the all-new Type 7 design layout, we achieved our goal of Apollo 11-like performance across a series of focal lengths that are eyeglass friendly.
Design Goals The design goal was simple. The performance of each of the Type 7 focal lengths must equal or exceed that of the Apollo 11 eyepiece in the areas of full-field sharpness, contrast, distortion correction, eye relief, and pupil comfort, but across an 82° apparent field of view instead of 85°.
Design Details If you have been waiting for a Nagler series for eyeglass wearers, the Type 7 is it. Combining the expansive 82° apparent field of view with 19 mm of eyeglass friendly eye relief, and large eyelens, the Nagler Type 7s give a new dimension to the "spacewalk" viewing effect. An easily adjustable, locking eye-guard is included for those who don't wear eyeglasses. It helps to correctly position your eye to the exit pupil so you don't get too close to the eyelens, as well as blocks contrast-robbing stray light from interfering with the view. Speaking of which, of course we've applied all the optical coating and baffling features Tele Vue eyepieces are known to maximize contrast and complement the fully corrected field; revealing beautifully natural star colors with pinpoint sharpness. The optical layout affords unrivalled parfocality throughout the four focal lengths and even between 1¼" and 2" modes when used with the Tele Vue Hi-Hat 1¼" and 2" adapter (ASF-8125). The Type 7 series is also parfocal with all other 1¼" Tele Vue eyepieces (except 40 mm Plössl) when those eyepieces are used in the Tele Vue Hi-Hat 1¼" and 2" adapter (ASF-8125). Available in focal lengths of 5.5, 9, 14, and 19-mm, the Type 7s complement the 22-mm Type 4 and 31 mm Type 5 as eyeglass friendly Naglers.
The Nagler Type 7 models all weight 19 to 21 oz / 540 to 590 gm.
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Specifications
| Focal Length (mm) | 14 |
| Barrel Size (in.) | 2" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 19 |
| Weight (lb / oz) | 1.23 / 19.7 |
| Field Stop (mm) | 20.5 |
$1,310.00
Concept The Nagler Type 7 series was developed as a natural extension of our highly regarded, 85°, limited edition Apollo 11 eyepiece. However, the series can also be thought of as an extension of the long eye relief Nagler Type 4 concept. With the all-new Type 7 design layout, we achieved our goal of Apollo 11-like performance across a series of focal lengths that are eyeglass friendly.
Design Goals The design goal was simple. The performance of each of the Type 7 focal lengths must equal or exceed that of the Apollo 11 eyepiece in the areas of full-field sharpness, contrast, distortion correction, eye relief, and pupil comfort, but across an 82° apparent field of view instead of 85°.
Design Details If you have been waiting for a Nagler series for eyeglass wearers, the Type 7 is it. Combining the expansive 82° apparent field of view with 19 mm of eyeglass friendly eye relief, and large eyelens, the Nagler Type 7s give a new dimension to the "spacewalk" viewing effect. An easily adjustable, locking eye-guard is included for those who don't wear eyeglasses. It helps to correctly position your eye to the exit pupil so you don't get too close to the eyelens, as well as blocks contrast-robbing stray light from interfering with the view. Speaking of which, of course we've applied all the optical coating and baffling features Tele Vue eyepieces are known to maximize contrast and complement the fully corrected field; revealing beautifully natural star colors with pinpoint sharpness. The optical layout affords unrivalled parfocality throughout the four focal lengths and even between 1¼" and 2" modes when used with the Tele Vue Hi-Hat 1¼" and 2" adapter (ASF-8125). The Type 7 series is also parfocal with all other 1¼" Tele Vue eyepieces (except 40 mm Plössl) when those eyepieces are used in the Tele Vue Hi-Hat 1¼" and 2" adapter (ASF-8125). Available in focal lengths of 5.5, 9, 14, and 19-mm, the Type 7s complement the 22-mm Type 4 and 31 mm Type 5 as eyeglass friendly Naglers.
The Nagler Type 7 models all weight 19 to 21 oz / 540 to 590 gm.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
Specifications
| Focal Length (mm) | 9 |
| Barrel Size (in.) | 2" & 1¼" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 19 |
| Weight (lb / oz) | 1.21 / 19.4 |
| Field Stop (mm) | 13 |
$1,310.00
Concept The Nagler Type 7 series was developed as a natural extension of our highly regarded, 85°, limited edition Apollo 11 eyepiece. However, the series can also be thought of as an extension of the long eye relief Nagler Type 4 concept. With the all-new Type 7 design layout, we achieved our goal of Apollo 11-like performance across a series of focal lengths that are eyeglass friendly.
Design Goals The design goal was simple. The performance of each of the Type 7 focal lengths must equal or exceed that of the Apollo 11 eyepiece in the areas of full-field sharpness, contrast, distortion correction, eye relief, and pupil comfort, but across an 82° apparent field of view instead of 85°.
Design Details If you have been waiting for a Nagler series for eyeglass wearers, the Type 7 is it. Combining the expansive 82° apparent field of view with 19 mm of eyeglass friendly eye relief, and large eyelens, the Nagler Type 7s give a new dimension to the "spacewalk" viewing effect. An easily adjustable, locking eye-guard is included for those who don't wear eyeglasses. It helps to correctly position your eye to the exit pupil so you don't get too close to the eyelens, as well as blocks contrast-robbing stray light from interfering with the view. Speaking of which, of course we've applied all the optical coating and baffling features Tele Vue eyepieces are known to maximize contrast and complement the fully corrected field; revealing beautifully natural star colors with pinpoint sharpness. The optical layout affords unrivalled parfocality throughout the four focal lengths and even between 1¼" and 2" modes when used with the Tele Vue Hi-Hat 1¼" and 2" adapter (ASF-8125). The Type 7 series is also parfocal with all other 1¼" Tele Vue eyepieces (except 40 mm Plössl) when those eyepieces are used in the Tele Vue Hi-Hat 1¼" and 2" adapter (ASF-8125). Available in focal lengths of 5.5, 9, 14, and 19-mm, the Type 7s complement the 22-mm Type 4 and 31 mm Type 5 as eyeglass friendly Naglers.
The Nagler Type 7 models all weight 19 to 21 oz / 540 to 590 gm.
Why Are There 4 Types of Naglers?
To achieve various features requires different design tradeoffs and thus the different types of Nagler eyepieces. The largest possible true fields of view for an 82°' apparent field of view in both 2" and 1¼" formats are achieved with the Nagler Type 5 series, with focal lengths of 31 and 16 mm
Compact size in medium to short focal lengths is achieved with the Nagler Type 6, available in focal lengths of 13, 11, 9, 7, 5, and 3.5 mm.
To achieve eyeglass friendly eye relief without excessively large and heavy designs requires the other two Nagler types. The 22mm Type 4 and 19, 14, 9, 5.5 mm Type 7 with their long eye relief feature adjustable height eyeguards and are best for eyeglass wearers or Dioptrx™ users.
Specifications
| Focal Length (mm) | 5.5 |
| Barrel Size (in.) | 2" & 1¼" |
| Apparent Field of View (deg.) | 82 |
| Eye Relief (mm) | 19 |
| Weight (lb / oz) | 1.29 / 20.6 |
| Field Stop (mm) | 8.1 |
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