Askar FRA 400 Quintuplet APO Astrograph (FRA400)
Askar FRA 400 Quintuplet APO Astrograph (FRA400)
Why Purchase from All-Star Telescope?
Free Expert Support
Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
Stress Free, Secure Transactions
You can trust purchasing and delivery with All-Star Telescope. All of our transactions are 100% secure and Level 1 PCI DSS compliant thanks to Shopify's ShopPay platform. For additional protection, we insure 100% of the value of every shipment we make. If it get's lost during shipment, we replace it. If it gets damaged during shipment, we repalce it. We make sure your product arrives exactly as you would expect it to; we promise.
We also ensure privacy protection. We never keep any of your credit card information on file and any of your personal data is stored accordign to our policies.
30 Day Return Policy
Buy with confidence knowing that we accept returns up to 30 days after purchase. We want you to have something you will actually use and we are confident that we keep good quality products in our store with No Junk.
Price Match Promise
Shipping around for the best price is tough, we make it easier by offering the best pricing in the market. But if you find a better price on an in-store item somewhere else we will match it!
Askar 2.5" F/3.9 Full Frame Reducer for FR...
ZWO AM5 Harmonic EQ and AZ Mount (ZWO-AM5)
ZWO TC40 Carbon Fiber Tripod for AM5 (ZWO-...
ZWO ASIAIR PLUS (ZWO-ASIAIR-PLUS)
You may have heard of the ASIAir, but if you haven't, it's a groundbreaking device that drastically simplifies astrophotography. This will allow y...
ZWO ASI2600MC Pro USB 3.0 Colour Cooled Ca...
These are extraordinary cameras. Incredible detail and sensitivity combined with huge sensors result in gorgeous wide-field images. They also work ...
ZWO Filter Drawer for 2" Mounted Filter (Z...
Filter drawers are the simplest way to improve your astrophotography. Whether you're adding a light pollution filter, or a premium performance narr...
Optolong L-Ultimate Dual-Band 3nm Filter 1...
ZWO 30mm f4 Mini Guide Scope (ZWO-30F4)
This is a great, lightweight guide scope. Compatible with any ZWO planetary or guide camera and capable of vastly improving your astrophotography m...
ZWO ASI220MM Mini Mono Guiding Camera (ASI...
This is a great guiding camera in a small, lightweight package. This will integrate seamlessly with the ASIAir, and will improve the performance of...
Why we love the Askar FRA 400 Quintuplet APO Astrograph (FRA400)
The FRA, which stands for "Flatfield Refractive Astragraph", is a refractive astrograph designed for built-in flat field correction. FRA also used in visual observation, this series creates versatile high-quality flat frame images for astrophotography, is the few great telescope of versatile optical tube.
For easy parameter conversion between different lenses, the first-come of the FRA family features a Petzval-like quintuplet design (two pieces of which are special ED glass) with an aperture of 72mm, a focal length of 400mm and a focal ratio of f/5.6, providing a 44mm image circle.
The FRA400 quintuplet astrograph has adopted modern optical design with a retractable dew shield, a 3" rack-and-gear-based high-precision reducer containing a 360-degree rotator, M68×1 thread, a 2" adapter ring and a 1.25" visual adapter. The reducer is equipped with fine focal adjustment function for more precise calibration in practical observation or sky imaging.
It is excellent in controlling and possibly avoiding chromatic aberrations. The image quality is also optimized to satisfy various observing or imaging purposes.
It’s worth mentioning that FRA 400/5.6 has a pair of fashionable-looking and multifunctional patented tube rings. Various practical attachments are available on three sides of the tube rings which is really a convenience for practical observation or imaging activities.
The back focus of FRA400 is 140mm, starting from the base of mounting thread on the housing to the focal plane. And users don't need to worry about the calculation of back focus when using FRA400, as long as the object in the objective lens is focused.
The portable and versatile astrograph can go with many potential attachments of other accessories during your observation or sky imaging. It’s definitely your intimate helper for your exploration.
F/5.6 is a relatively fast focal ratio for astrophotographic use, but we further provide an ultra focal reducer to satisfy the special needs of experienced imagers, greatly reducing the practical focal ratio to f/3.9. This inventive combination supports full-frame imaging and can dramatically shorten the exposure time, which is a pioneering design in the astrophotography field.
The inborn mission of Askar FRA400 is to simplify and enhance our customers’ observing and imaging practice, bringing them infinite surprise when safariing the boundless universe.
What can I see with a Askar FRA 400 Quintuplet APO Astrograph (FRA400)?
Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.
25mm Eyepiece - 16x Magnification
10mm Eyepiece - 40x Magnification
5mm Eyepiece - 80x Magnification
Moon with 25mm Eyepiece
Moon with 10mm Eyepiece
Moon with 5mm Eyepiece
Andromeda with 36mm Eyepiece
Andromeda with 25mm Eyepiece
Andromeda with 10mm Eyepiece
What's in the Box
|Objective Type||Quintuplet dual ED air-spaced APO|
|Back Focus||140mm (from the end of rotator M68x1 thread)|
|Back-End Adapter||M68x1 male thread, 2" adapter/1.25" adapter|
I bought this a few months ago and now that I've had time to et the feel of it....I'm super impressed. This is actually my first refractor and I was worried about the new learning curve going from reflectors The built in reducer and adapter cones are a big plus and make the back focus simple and easy. This thing takes beautiful photos from edge to edge. I highly recommend it. I only wish it came with a carry case...other than that I cannot complain.
Here is an example. The Rosette nebula 100 - 60sec exposures, zwo533mc. just slightly cropped to remove stacking artifacts.
Heard about it from a friend..seems like an extraordinary buy
Got this from all-star last year, perfect stars edge to edge even without the reducer. Light enough for my cem25p as well.