CHF 599
Reference LU-0024
Visit Askar 71F is a compact and versatile apochromatic telescope, designed for both
l’wide-field astrophotography as well as for visual observation. Its air-spaced quadruplet objective,
featuring an ED glass element, offers excellent chromatic aberration correction and a corrected field compatible with the
full-frame sensors.
Thanks to its optical design featuring integrated flat field, the 71F does not require any additional field corrector.
It is also not necessary to maintain a specific backfocus distance: simply connect the equipment
take a photo, and then focus.
The Askar 71F has an aperture of 71 mm, a focal length of 490 mm and a native focal ratio
from f/6.9. Its air-spaced APO quadruplet optical design includes an ED element that helps reduce
effectively corrects chromatic aberrations.
Its image circle, corrected for 44 mm allows it to be used with astronomical cameras and regular cameras
equipped with full-frame sensors, while maintaining well-defined stars all the way to the corners of the image.
The 71F is a native flat-field eyepiece. Therefore, it does not require the purchase of a field corrector or a field flattener.
additional. Unlike many astronomical telescopes, it also does not require you to maintain a certain distance
a fixed backfocus distance between the lens and the sensor.
After setting up your camera, filter wheel, or camera, all you need to do is focus to
begin data acquisition. This design greatly simplifies the setup of the imaging system.
The Askar 71F comes with a set of photographic adapter rings and tubes that include, among other things, connections
M54 × 0.75 and M48 × 0.75. The M48 adapter also features a thread that allows
the installation of a 2-inch filter.
The eyepiece can therefore be easily used with an SLR or mirrorless camera, a cooled astronomical camera,
a filter wheel, a filter drawer, or other photography accessories.
The optical tube is fully CNC-machined and features a compact, rugged design. The retractable anti-fog shield
reduces the transport distance, while its interior, coated with a matte finish, minimizes unwanted reflections.
The rack-and-pinion eyepiece holder from 2.4 inches features a multi-stage focusing system 1:10.
A 360° graduated field rotator allows for precise adjustment of the camera's orientation.
The top handle has a slot for a search tool. There are two additional slots on each side.
from the eyepiece holder to mount a finder scope, a guiding system, a mini-computer, or other accessories.
The telescope is equipped with a Vixen dovetail mount 230 mm. It also has threads
1/4″ and 3/8″, allowing for direct attachment to many camera tripods or heads
compatible panoramic images.
When using the camera on a tripod, make sure that the head and tripod can comfortably support the
Total weight of the scope and its accessories.
| Opening | 71 mm |
|---|---|
| Focal length | 490 mm |
| Focus report | f/6.9 |
| Optical package | APO Quadruplet with Air Spacing |
| ED glass | 1 item |
| Image circle | 44 mm, full-format compatible |
| Field corrector | Integrated |
| Eyepiece Holder Travel | 50 mm |
| Lens holder | 2.4-inch rack, 1:10 two-speed |
| Rotator | 360° Graduated Field Rotator |
| Optical tube weight | 2.5 kg |
| Weight with collars and dovetail | 3 kg |
| Dovetail | Vixen, length 230 mm |
| Threads for tripods | 1/4″ and 3/8″ |
| Configuration | Length |
|---|---|
| With 1.25″ adapter, dew shield retracted | 372.5 mm |
| With 1.25-inch adapter, anti-fog screen deployed | 430.9 mm |
| With camera adapter, anti-fog screen retracted | 415 mm |
| With camera adapter, anti-fog screen deployed | 473.4 mm |
| Configuration | Eyepiece holder retracted | Eyepiece holder extended |
|---|---|---|
| From the M48 × 0.75 male thread | 82.5 mm | 32.5 mm |
| From the M54 × 0.75 male thread | 100.5 mm | 50.5 mm |
| From the 1.25-inch eyepiece holder | 111 mm | 61 mm |
| From the 2-inch eyepiece holder | 121 mm | 71 mm |
Note: cameras, video cameras, filters, elbow mirrors, eyepieces, focusing systems
Electronics and other accessories shown in some illustrations are not necessarily included.
