Askar FRA 500 Quintuplet APO Astrograph (FRA500)
Askar FRA 500 Quintuplet APO Astrograph (FRA500)
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!
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...
Askar 2.5" F/3.9 Full Frame Reducer for FR...
Why we love the Askar FRA 500 Quintuplet APO Astrograph (FRA500)
Sharpstar Optics introduces Askar FRA500 astrograph, which is the youngest among the FRA family well-known to our customers. Compared with its siblings, the 500mm-focal-length refractor has an aperture size of 90mm (f/5.6), so Askar FRA500 can better fit into the scenarios of deep-sky imaging than the Askar FRA400. Besides, it is more lightweight and compact than Askar FRA600, which makes it a great choice for out-door observation or astrophotography.
Askar FRA500 has inherited the legacies of superior FRA- series designing. It boasts a quintuplet air-spaced APO optical structure, a “three plus two” Petzval lens combination. The front lens group consists of three lenses (including two pieces of ED glass) for excellent correction of aberrations. The posterior group is composed of two lenses separated by small space which is able to provide fine sharpness across the whole image. You may barely detect any blurry star at the edge of the image. FRA500 supports an image circle of amazing 55mm, much larger than the standard 44mm full-frame image circle. Its special back-focus design frees users from calculating confusing back-focus distance or rummaging around for a proper spacer. What you need to focus on is just to make your target stay in focus.
Askar FRA500 is typically a wonderful mix of pragmatism and aesthetics. The astrograph shows smooth lines and a sound layout of components. From the front, the Askar FRA500 has an impressive dew shield decorated with a classic bright-red bezel ring. The total length of FRA500 is 452mm when the dew shield is stretched out and 410mm when contracted back. At the tail end of the astrograph locates a 3.5" massively-built focuser with dual-speed hand knobs (twin knobs for coarse adjustment and one 1:10 fine adjustment knob), which is of great use in real observation or astrophotography.
The astrograph wears smooth coating and is evenly finished. The graduation inside of the focuser is quite clear and easily readable. The focuser is tough and solid, and on the left side of it, there is a standard finder base with a silver thumb screw. So the FRA500 can piggyback carry finders, guiders or other potential astronomy accessories.
Askar FRA500 comes also with a pair of sought-after tube rings. On the top of the tube rings attached a handle and at the bottom, there is an Askar Losmandy-style dovetail plate. The combination of milk-white main tube and dew shield together with a high-gloss piano-black focuser makes the optical tube assembly calm and deep which is offset by the bright red decorative ring and tube rings.
The Askar FRA500 is 410mm long and weighs about 4kg, so it’s quite convenient for users to carry around or mount on an EQ mount. It’s particularly suitable for astronomy enthusiasts who frequently engage in long-distance trips or out-door astrophotography.
Askar FRA500 together with the FRA family is well received for large aperture, fast speed, delicate focusing system, unique optical design and the subsequently high-quality imaging results. Wish the Askar FRA500 be a loyal companion alongside your journey of astrophotography.
What can I see with a Askar FRA 500 Quintuplet APO Astrograph (FRA500)?
Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.
25mm Eyepiece - 20x Magnification
10mm Eyepiece - 50x Magnification
5mm Eyepiece - 100x 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
|Quintuplet air-spaced APO (including two ED glass)
|158mm（from base of M48×0.75 thread on the conical extender to focal plane
85mm（from base of M86×1 thread on the rotator to focal plane）
|452mm（410mm when the dew shield is contracted)
|Rear-end thread type
I attached a full frame DSLR on this telescope and I don't have to crop anything!
The stars are round all across the FOV, even on the edges.