About this product
Model: askar_fra600_5.6
Part Number: ASFRA600
Optical Bench Test
At FLO, we check all our Askar telescopes on an optical bench before dispatch.
So you can be confident your telescope will have well-figured optics, negligible false colour and spherical aberration, and no astigmatism (the bane of any optical system!). Star shapes will be round, not triangular, oval or egg-shaped!
New ASKAR FRA600 108mm f/5.6 Flatfield Astrograph
The Askar FRA600 (Flatfield Refractive Astrograph) has a 5-element Petzval optical design (front triplet and rear doublet) with two ED glass elements for excellent colour correction.
The imaging circle is an impressive 66mm - larger than a full-frame sensor!
The two rear lenses have an 80mm diameter to reduce vignetting and ensure the scope delivers pinpoint stars to the edge.
It also performs well as a rich field telescope for visual astronomy (star diagonal not included).
The large 4.2” Rack & Pinion dual-speed focuser is fully rotatable through 360 degrees. The focuser tube terminates with an M90x1 thread for direct camera attachment and includes a handy conical M90-M54/M48 adapter suitable for connecting most DSLR and dedicated Astro Imaging cameras. It also has a 2” adapter ring and a 1.25”-2” adapter for use with diagonals, eyepieces, or smaller cameras.
The FRA600 is supplied with aluminium tube-rings, a Losmandy-style dovetail, and a carrying handle. The rings have additional mounting points for accessories.
The entire telescope is just 493mm long, with the dew shield retracted and weighs 6.5kg.
Includes hard storage/travel case.
FEATURES
- Aperture: 108mm / 4.3in
- Focal Length: 600mm
- Focus Ratio: f/5.6
- Objective Type: Quintuplet Dual ED Air-Spaced APO
- Overall length: 493mm (with the dew shield retracted)
- Weight: 6.5kg
- Packing Weight: 7.8kg
- Back-end Adapter: M108x1 Male Thread (without rotator), M90x1 Male Thread, 2" Adapter / 1.25" Adapter
- Included Conical Adapter: M90x1 to M54x0.75, M54x0.75 to M48x0.75
- Back focus: 160mm (from the end of the rotator M90x1 thread)
Telescope Field of View Simulator
Focuser Mechanics
Dimensions
Optics
What's in the box
- Telescope OTA
- Tube rings
- Carry Handle
- Losmandy-style Dovetail Bar
- M90 to 2" Eyepiece Holder
- 2" to 1.25" adapter
- M90 to M54 / M48 Conical Camera Adapter
- Instruction manual
- Quality Control Inspection List
- Hard case
Customer reviews
Average Rating (1 Review): | |
Absolutely no regrets - Fantastic refractor 05 January 2024 | Rob
I spent several months going thru the specs of many refractors and scouring the forums for any recomendations before settling on the FRA600. Now having had it for 6 months it's everything I wanted from an affordable astrograph dedicated to imaging. Lightweight enough to easily use portable on the AM5 mount and very well machined. Stars are very uniform and the resultant images are all I can ask for. It's been out overnight in some VERY dewy conditions without issue.
Dealing with FLO was great and they double checked my long shopping list for compatability before placing order.
FAQ
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