Quintuplet astrograph telescope Askar FRA400 72mm f/5.6

Telescope astrograph quintuplet Askar FRA400 72mm f/5.6

Astrograph ASKAR FRA 400 72mm f/5.6 quintuplet
ASKAR is the new line of telescopes selected for astrophotography. With these telescopes great attention is paid to optical quality, but also to mechanics. FRA stands for refractor telescopes with integrated corrector element for a flat, corrected image field. The FRA series is mainly used for astrophotography.

The ASKAR FRA400 is a 5-element Petzval apo with 400 mm focal length, f/5.6 and 72 mm aperture. On the lens there are 2 ED lenses for good correction of chromatic aberration. The apo is corrected for cameras up to FULL FRAME format.

The anti-fog lens hood also offers good protection against stray light and can be extended. The large focuser holds even heavy cameras and allows sharp focusing due to the speed reduction. For connections 2", 1.25" and M68x1 thread are available. Also included is an adapter to M48x0.75 which is ideal for all cameras with a working distance of 55 mm.

Important: To access the M48 female thread for 2" filters, unscrew the adapter, then it is very easy.

A specialist for photography, but also suitable for observation:
The ASKAR FRA400 is designed for astrophotography. However, due to the comfortable working distance, 2" star diagonals can also be connected. This makes the astrograph a very good telescope for astronomical observation and also for landscape observation. All common 2" and 1.25" accessories can be attached.

Speed increase to f/3.9
The focal ratio of f/5.6 is already relatively fast. But often you want even faster optics. With the optional FRA400Red, you can increase the speed from f/5.6 to f/3.9, thus halving the exposure time. The focal length is shortened to 281 mm.

General features:

• Aperture 72 mm
• Focal length 400mm / focal ratio f/5.6
• 5-element quintuplet design with tube corrector
• Two ED lenses in the lens for very good correction of chromatic aberration
• 44 mm image circle with full illumination and full correction
• 140 mm working distance for visual observation or focal length reduction
• Stable 3" double speed RAP focuser with 360° rotation
• 2" and 1.25" receptacles as well as M68x1 external thread for screw adapters
• Delivery includes a long M68 to M48x0.75 adapter for camera connection (with 2" filter thread)
• Flexible GP/EQ5 style dovetail rod with photographic tripod connection and carrying handle with flexible slotted hole
• Finder shoe for standard finder stand
• Manufacturer's inspection checklist included

Technical Specifications:

• Aperture: 72mm
• Focal length: 400mm
• Focal ratio: f/5.6
• Telescope type: 5-element apo quintuplet with 2-element ED lens
• Transport length: 317mm
• Weight: 2.56 kg
• Camera side connection: M68x1 external thread, 2" and 1.25" receptacle
• Photo adapter: female thread M68x1 - male thread M48x0,75 - length 63,5 mm
• Filter thread: 2" filter thread (M48x0,75) included in the photoadapter (access after unscrewing the adapter)

what is included in the box?

• Apo telescope
• CNC tube rings
• Dovetail type Vixen
• Hand grip handle
• Photo adapter to M48x0.75
• Finder shoe (mounted)
• Inspection list

Quintuplet astrograph telescope Askar FRA400 72mm f/5.6