A 70 mm f/7.0 four-element apochromatic refractor with a native flat field and a 44 mm full-frame image circle. At 2.5 kg it is the grab-and-go scope of the FF series, designed for both astrophotography and visual observing.
Every FF series telescope is built around a native flat field, so the optics, focuser and rear interfaces all serve one goal: clean stars across the whole sensor.
Attach your camera, reach focus, start imaging. No flattener. No spacing maths.
Optics
Four elements, fully air-spaced.
The FF70 APO uses a four-element, fully air-spaced apochromatic design in which all four elements work together to form the image. One ED (extra-low dispersion) glass element reduces chromatic aberration for cleaner colour correction and sharper stars.
Native flat field
Flat to the edge. No flattener.
The flat imaging field is generated by the optical design itself, so there is no field flattener to buy and no back focus calculations to get right. Once focus is achieved, you are ready to capture.
Full-frame support
44 mm image circle.
A 44 mm corrected image circle fully covers full-frame sensors, with sharp star fields and consistent illumination from centre to corner. Smaller APS-C and dedicated astronomy sensors have generous headroom.
Focusing
1:10 dual-speed control.
A rigid 2.4″ rack-and-pinion focuser offers precise control, and the 1:10 coarse and fine adjustment makes critical focus easy to hit. A built-in 360° rotator at the rear sets your framing without disturbing focus.
Build
Retractable dew shield.
The dew shield retracts to shorten the tube for packing and travel. Precision CNC machining, a high-quality painted finish and an internal anti-reflection coating keep stray light down and image contrast up.
Connectivity
Adapters in the box.
A photography extension tube with a 2″ filter thread is included, along with rear adapters in M48×0.75 and M54×0.75 standards. The quick-release mounting rings detach in seconds for fast setup and teardown.
Quadruplet optics
Four elements. One flat field.
All four air-spaced elements work together to form the image, with one ED glass element controlling chromatic aberration for clean colour correction and tight, well-defined stars.
Optical layout
The light path, end to end.
The optical layout delivers a corrected, flat field at the sensor with no additional optics in the imaging train. What leaves the objective arrives at your camera, flat.
Full-frame ready
44 mm image circle.
Full-frame sensors are covered corner to corner with sharp star fields and consistent illumination, and smaller sensors sit comfortably inside the sweet spot.
Critical focus
Coarse and fine, 1:10.
The rigid 2.4″ rack-and-pinion focuser moves imaging trains smoothly, and the 1:10 fine knob gives you the resolution to land exact focus on a star.
Framing
360° of rotation.
A built-in rotator at the rear lets you set the camera angle for perfect framing without unthreading anything or disturbing focus.
Field-ready build
Quick-release rings. Retractable dew shield.
The mounting rings detach in seconds for fast setup and teardown, and the dew shield slides back to shorten the tube for transport. CNC machining and an internal anti-reflection coating keep contrast high.
In the box
Photography extension tube.
A photography extension tube with a 2″ filter thread is included, plus M48×0.75 and M54×0.75 rear adapters, connecting cameras, filters and accessories cleanly out of the box.
Lightweight and compact
2.5 kg, ready when you are.
At 70 mm aperture and 490 mm focal length, the FF70 APO balances portability against real performance. The optical tube weighs just 2.5 kg, or 3.0 kg with the handle, mounting rings and dovetail plate fitted.
Flexible connectivity
One telescope. Three configurations.
Pair the FF70 APO with ZWO ASI astronomy cameras, attach a DSLR or mirrorless body, or drop in a diagonal and eyepiece for visual observing. Focus is reached within a back focus range of 32.5–82.5 mm, measured from the M54–M48 interface shoulder. Visual accessories are available separately.
Every detail, considered.
Four-element, fully air-spaced apochromatic design with one ED glass element.
Native flat-field design, no separate field flattener or spacing adjustments required.
44 mm image circle with full-frame sensor support and edge-to-edge sharpness.
2.4″ rack-and-pinion focuser with 1:10 coarse and fine adjustment.
Built-in 360° rotator for precise camera angle adjustment.
Retractable dew shield with internal anti-reflection coating for higher contrast.
Quick-release mounting rings for fast setup and teardown.
Photography extension tube with 2″ filter thread plus M48×0.75 and M54×0.75 rear adapters included.
Specifications.
Optics
Effective aperture
70 mm
Focal length
490 mm
Focal ratio
f/7.0
Objective type
Four-element air-spaced APO (includes 1 ED element)
Image circle
44 mm
Integrated field flattener design
Yes
Focuser and rotation
Focuser
2.4″ rack-and-pinion, 1:10 coarse and fine adjustment
Camera rotator
Built-in, 360°
Back focus
Back focus range
32.5–82.5 mm, measured from the M54–M48 interface shoulder
Maximum rear connection length (focuser retracted)
Imaging mode
82.5 mm (from M48×0.75 male thread) 100.5 mm (from M54×0.75 male thread)
Observation mode
117 mm (from 1.25″ eyepiece holder) 127 mm (from 2″ eyepiece holder)
Dimensions and weight
Overall length
372.5 mm (1.25″ interface retracted) 415 mm (photography extension tube retracted) 430.9 mm (1.25″ interface extended) 473.4 mm (photography extension tube extended)
Telescope body weight
2.5 kg
Standard configuration weight
3.0 kg (including handle, mounting rings and dovetail plate)
A 90 mm f/6.8 four-element apochromatic refractor with a native flat field and a 44 mm full-frame image circle. The all-rounder of the FF series, with the aperture for serious deep-sky imaging and the weight for an easy portable setup.
Every FF series telescope is built around a native flat field, so the optics, focuser and rear interfaces all serve one goal: clean stars across the whole sensor.
Attach your camera, reach focus, start imaging. No flattener. No spacing maths.
Optics
Four elements, fully air-spaced.
The FF90 APO uses a four-element, fully air-spaced apochromatic design in which all four elements work together to form the image. One ED (extra-low dispersion) glass element reduces chromatic aberration for cleaner colour correction and sharper stars.
Native flat field
Flat to the edge. No flattener.
The flat imaging field is generated by the optical design itself, so there is no field flattener to buy and no back focus calculations to get right. Once focus is achieved, you are ready to capture.
Full-frame support
44 mm image circle.
A 44 mm corrected image circle fully covers full-frame sensors, with sharp star fields and consistent illumination from centre to corner. Smaller APS-C and dedicated astronomy sensors have generous headroom.
Focusing
1:10 dual-speed control.
A rigid 3″ rack-and-pinion focuser offers precise control, and the 1:10 coarse and fine adjustment makes critical focus easy to hit. A built-in 360° rotator at the rear sets your framing without disturbing focus.
Build
Retractable dew shield.
The dew shield retracts to shorten the tube for packing and travel. Precision CNC machining, a high-quality painted finish and an internal anti-reflection coating keep stray light down and image contrast up.
Connectivity
Adapters in the box.
A photography extension tube with a 2″ filter thread is included, along with rear adapters in M48×0.75 and M54×0.75 standards. The quick-release mounting rings detach in seconds for fast setup and teardown.
Quadruplet optics
Four elements. One flat field.
All four air-spaced elements work together to form the image, with one ED glass element controlling chromatic aberration for clean colour correction and tight, well-defined stars.
Optical layout
The light path, end to end.
The optical layout delivers a corrected, flat field at the sensor with no additional optics in the imaging train. What leaves the objective arrives at your camera, flat.
Full-frame ready
44 mm image circle.
Full-frame sensors are covered corner to corner with sharp star fields and consistent illumination, and smaller sensors sit comfortably inside the sweet spot.
Critical focus
Coarse and fine, 1:10.
The rigid 3″ rack-and-pinion focuser moves heavy imaging trains smoothly, and the 1:10 fine knob gives you the resolution to land exact focus on a star.
Framing
360° of rotation.
A built-in rotator at the rear lets you set the camera angle for perfect framing without unthreading anything or disturbing focus.
Field-ready build
Quick-release rings. Retractable dew shield.
The mounting rings detach in seconds for fast setup and teardown, and the dew shield slides back to shorten the tube for transport. CNC machining and an internal anti-reflection coating keep contrast high.
In the box
Photography extension tube.
A photography extension tube with a 2″ filter thread is included, plus M48×0.75 and M54×0.75 rear adapters, connecting cameras, filters and accessories cleanly out of the box.
Lightweight and compact
90 mm of aperture, without the bulk.
At 90 mm aperture and 609 mm focal length, the FF90 APO gathers noticeably more light than smaller travel scopes while staying genuinely portable. The optical tube weighs 3.92 kg, or 4.52 kg with the handle, mounting rings and dovetail plate fitted.
Flexible connectivity
One telescope. Three configurations.
Pair the FF90 APO with ZWO ASI astronomy cameras, attach a DSLR or mirrorless body, or drop in a diagonal and eyepiece for visual observing. Focus is reached within a back focus range of 45–75 mm, measured from the M54–M48 interface shoulder. Visual accessories are available separately.
Every detail, considered.
Four-element, fully air-spaced apochromatic design with one ED glass element.
Native flat-field design, no separate field flattener or spacing adjustments required.
44 mm image circle with full-frame sensor support and edge-to-edge sharpness.
3″ rack-and-pinion focuser with 1:10 coarse and fine adjustment.
Built-in 360° rotator for precise camera angle adjustment.
Retractable dew shield with internal anti-reflection coating for higher contrast.
Quick-release mounting rings for fast setup and teardown.
Photography extension tube with 2″ filter thread plus M48×0.75 and M54×0.75 rear adapters included.
Specifications.
Optics
Effective aperture
90 mm
Focal length
609 mm
Focal ratio
f/6.8
Objective type
Four-element air-spaced APO (includes 1 ED element)
Image circle
44 mm
Integrated field flattener design
Yes
Focuser and rotation
Focuser
3″ rack-and-pinion, 1:10 coarse and fine adjustment
Camera rotator
Built-in, 360°
Back focus
Back focus range
45–75 mm, measured from the M54–M48 interface shoulder
Maximum rear connection length (focuser retracted)
Imaging mode
75 mm (from M48×0.75 male thread) 93 mm (from M54×0.75 male thread)
Observation mode
112 mm (from 1.25″ eyepiece holder) 122 mm (from 2″ eyepiece holder)
Dimensions and weight
Overall length
513 mm (1.25″ interface retracted) 550 mm (photography extension tube retracted) 599 mm (1.25″ interface extended) 636 mm (photography extension tube extended)
Telescope body weight
3.92 kg
Standard configuration weight
4.52 kg (including handle, mounting rings and dovetail plate)
A 131 mm f/7.5 four-element apochromatic refractor with a native flat field and a 44 mm full-frame image circle. The flagship of the FF series, with 983 mm of focal length and serious light grasp for deep-sky imaging.
Every FF series telescope is built around a native flat field, so the optics, focuser and rear interfaces all serve one goal: clean stars across the whole sensor.
Attach your camera, reach focus, start imaging. No flattener. No spacing maths.
Optics
Four elements, fully air-spaced.
The FF131 APO uses a four-element, fully air-spaced apochromatic design in which all four elements work together to form the image. One ED (extra-low dispersion) glass element reduces chromatic aberration for cleaner colour correction and sharper stars.
Native flat field
Flat to the edge. No flattener.
The flat imaging field is generated by the optical design itself, so there is no field flattener to buy and no back focus calculations to get right. Once focus is achieved, you are ready to capture.
Full-frame support
44 mm image circle.
A 44 mm corrected image circle fully covers full-frame sensors, with sharp star fields and consistent illumination from centre to corner. Smaller APS-C and dedicated astronomy sensors have generous headroom.
Focusing
1:10 dual-speed control.
A rigid 3″ rack-and-pinion focuser offers precise control, and the 1:10 coarse and fine adjustment makes critical focus easy to hit. A built-in 360° rotator at the rear sets your framing without disturbing focus.
Build
Retractable dew shield.
The dew shield retracts to shorten the tube for packing and travel. Precision CNC machining, a high-quality painted finish and an internal anti-reflection coating keep stray light down and image contrast up.
Connectivity
Adapters in the box.
A four-section photography extension tube with a 2″ filter thread is included, along with rear adapters in M48×0.75 and M54×0.75 standards. The quick-release mounting rings detach in seconds for fast setup and teardown.
Quadruplet optics
Four elements. One flat field.
All four air-spaced elements work together to form the image, with one ED glass element controlling chromatic aberration for clean colour correction and tight, well-defined stars.
Optical layout
The light path, end to end.
The optical layout delivers a corrected, flat field at the sensor with no additional optics in the imaging train. What leaves the objective arrives at your camera, flat.
Full-frame ready
44 mm image circle.
Full-frame sensors are covered corner to corner with sharp star fields and consistent illumination, and smaller sensors sit comfortably inside the sweet spot.
Critical focus
Coarse and fine, 1:10.
The rigid 3″ rack-and-pinion focuser moves heavy imaging trains smoothly, and the 1:10 fine knob gives you the resolution to land exact focus on a star.
Framing
360° of rotation.
A built-in rotator at the rear lets you set the camera angle for perfect framing without unthreading anything or disturbing focus.
Field-ready build
Quick-release rings. Retractable dew shield.
The mounting rings detach in seconds for fast setup and teardown, and the dew shield slides back to shorten the tube for transport. CNC machining and an internal anti-reflection coating keep contrast high.
In the box
Photography extension tube.
A four-section photographic extension tube with a 2″ filter thread is included, plus M48×0.75 and M54×0.75 rear adapters, connecting cameras, filters and accessories cleanly out of the box.
Aperture and reach
131 mm of light grasp, 983 mm of reach.
The flagship of the FF series pulls in the most light and resolves the finest detail of the range, and the 983 mm focal length frames smaller targets tightly. The optical tube weighs 7.9 kg, or 9.4 kg with the handle, mounting rings and dovetail plate fitted.
Flexible connectivity
One telescope. Three configurations.
Pair the FF131 APO with ZWO ASI astronomy cameras, attach a DSLR or mirrorless body, or drop in a diagonal and eyepiece for visual observing. Focus is reached within a back focus range of 42–73 mm, measured from the M54–M48 interface shoulder. Visual accessories are available separately.
Every detail, considered.
Four-element, fully air-spaced apochromatic design with one ED glass element.
Native flat-field design, no separate field flattener or spacing adjustments required.
44 mm image circle with full-frame sensor support and edge-to-edge sharpness.
3″ rack-and-pinion focuser with 1:10 coarse and fine adjustment.
Built-in 360° rotator for precise camera angle adjustment.
Retractable dew shield with internal anti-reflection coating for higher contrast.
Quick-release mounting rings for fast setup and teardown.
Four-section photography extension tube with 2″ filter thread plus M48×0.75 and M54×0.75 rear adapters included.
Specifications.
Optics
Effective aperture
131 mm
Focal length
983 mm
Focal ratio
f/7.5
Objective type
Four-element air-spaced APO (including one ED element)
Image circle
44 mm
Integrated field flattener design
Yes
Focuser and rotation
Focuser
3″ rack-and-pinion, 1:10 coarse and fine adjustment
Camera rotator
Built-in, 360°
Back focus
Back focus range
42–73 mm, measured from the M54–M48 interface shoulder
Maximum rear connection length (focuser retracted)
Imaging mode
73 mm (from the M48×0.75 male thread) 91 mm (from the M54×0.75 male thread)
Observation mode
131 mm (from the 1.25″ interface) 142 mm (from the 2″ interface)
A 110 mm f/7.0 four-element apochromatic refractor with a native flat field and a 44 mm full-frame image circle. With 766 mm of focal length, it reaches deeper into galaxies and small nebulae while remaining a practical one-person setup.
Every FF series telescope is built around a native flat field, so the optics, focuser and rear interfaces all serve one goal: clean stars across the whole sensor.
Attach your camera, reach focus, start imaging. No flattener. No spacing maths.
Optics
Four elements, fully air-spaced.
The FF110 APO uses a four-element, fully air-spaced apochromatic design in which all four elements work together to form the image. One ED (extra-low dispersion) glass element reduces chromatic aberration for cleaner colour correction and sharper stars.
Native flat field
Flat to the edge. No flattener.
The flat imaging field is generated by the optical design itself, so there is no field flattener to buy and no back focus calculations to get right. Once focus is achieved, you are ready to capture.
Full-frame support
44 mm image circle.
A 44 mm corrected image circle fully covers full-frame sensors, with sharp star fields and consistent illumination from centre to corner. Smaller APS-C and dedicated astronomy sensors have generous headroom.
Focusing
1:10 dual-speed control.
A rigid 3″ rack-and-pinion focuser offers precise control, and the 1:10 coarse and fine adjustment makes critical focus easy to hit. A built-in 360° rotator at the rear sets your framing without disturbing focus.
Build
Retractable dew shield.
The dew shield retracts to shorten the tube for packing and travel. Precision CNC machining, a high-quality painted finish and an internal anti-reflection coating keep stray light down and image contrast up.
Connectivity
Adapters in the box.
A photography extension tube with a 2″ filter thread is included, along with rear adapters in M48×0.75 and M54×0.75 standards. The quick-release mounting rings detach in seconds for fast setup and teardown.
Quadruplet optics
Four elements. One flat field.
All four air-spaced elements work together to form the image, with one ED glass element controlling chromatic aberration for clean colour correction and tight, well-defined stars.
Optical layout
The light path, end to end.
The optical layout delivers a corrected, flat field at the sensor with no additional optics in the imaging train. What leaves the objective arrives at your camera, flat.
Full-frame ready
44 mm image circle.
Full-frame sensors are covered corner to corner with sharp star fields and consistent illumination, and smaller sensors sit comfortably inside the sweet spot.
Critical focus
Coarse and fine, 1:10.
The rigid 3″ rack-and-pinion focuser moves heavy imaging trains smoothly, and the 1:10 fine knob gives you the resolution to land exact focus on a star.
Framing
360° of rotation.
A built-in rotator at the rear lets you set the camera angle for perfect framing without unthreading anything or disturbing focus.
Field-ready build
Quick-release rings. Retractable dew shield.
The mounting rings detach in seconds for fast setup and teardown, and the dew shield slides back to shorten the tube for transport. CNC machining and an internal anti-reflection coating keep contrast high.
In the box
Photography extension tube.
A photography extension tube with a 2″ filter thread is included, plus M48×0.75 and M54×0.75 rear adapters, connecting cameras, filters and accessories cleanly out of the box.
Aperture and reach
110 mm of light grasp, 766 mm of reach.
With more aperture than the FF70 and FF90, the FF110 APO pulls in significantly more light than its smaller siblings, while the 766 mm focal length frames smaller targets more tightly. The optical tube weighs 5.74 kg, or 6.76 kg with the handle, mounting rings and dovetail plate fitted.
Flexible connectivity
One telescope. Three configurations.
Pair the FF110 APO with ZWO ASI astronomy cameras, attach a DSLR or mirrorless body, or drop in a diagonal and eyepiece for visual observing. Focus is reached within a back focus range of 42–73 mm, measured from the M54–M48 interface shoulder. Visual accessories are available separately.
Every detail, considered.
Four-element, fully air-spaced apochromatic design with one ED glass element.
Native flat-field design, no separate field flattener or spacing adjustments required.
44 mm image circle with full-frame sensor support and edge-to-edge sharpness.
3″ rack-and-pinion focuser with 1:10 coarse and fine adjustment.
Built-in 360° rotator for precise camera angle adjustment.
Retractable dew shield with internal anti-reflection coating for higher contrast.
Quick-release mounting rings for fast setup and teardown.
Photography extension tube with 2″ filter thread plus M48×0.75 and M54×0.75 rear adapters included.
Specifications.
Optics
Effective aperture
110 mm
Focal length
766 mm
Focal ratio
f/7.0
Objective type
Four-element air-spaced APO (including one ED element)
Image circle
44 mm
Integrated field flattener design
Yes
Focuser and rotation
Focuser
3″ rack-and-pinion, 1:10 coarse and fine adjustment
Camera rotator
Built-in, 360°
Back focus
Back focus range
42–73 mm, measured from the M54–M48 interface shoulder
Maximum rear connection length (focuser retracted)
Imaging mode
73 mm (from the M48×0.75 male thread) 91 mm (from the M54×0.75 male thread)
Observation mode
132 mm (from the 1.25″ eyepiece holder) 142 mm (from the 2″ eyepiece holder)
