Askar FRA500 f/5.6 Quintuplet APO Apochromatic Refractor Telescope
5-LENZ PETZVAL-LIKE DESIGN - TWO ED ELEMENTS - SUPERIOR 15-STEP QUALITY CONTROL - SUPERB VALUE AND QUALITY FROM SHARPSTAR!
The ultimate portable astro photo and nature photography instrument in this size and quality!
Look no further for the highest quality "Flatfield Refractive Astrograph" - FRA in the 108mm aperture.
Sharpstar Optics introduces the Askar FRA500 astrograph, which is the youngest amongst the well-known FRA- family.
Compared to its siblings, the 500mm-focal-length apochromatic refractor has an aperture size of 90mm (f/5.6), so the Askar FRA500 can better fit into the scenarios of deep-sky imaging than the Askar FRA400 (i.e. imaging smaller objects like galaxies).
Otherwise, its lighter and more compact than the Askar FRA600, which makes it a great choice for out-door observation and portable astrophotography.
Askar FRA500 has inherited the legacies of the superior FRA- series design. 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.
The FRA500 supports an image circle of an 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 take care of is just to make your target stay in focus.
The Askar FRA500 is 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 extended and 410mm when retracted back. At the back end of the astrograph located 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 visual observation and 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.
At The Widescreen Centre, we prioritize prompt order processing and dispatch. We strive to dispatch all orders on the same day or the next working day, depending on the time of your order. We hold extensive stocks to ensure that your items are ready for immediate despatch. Please note that the cut-off time for same-day dispatch is usually 1:30 p.m.
For delivery within Mainland UK, we use reputable couriers to provide efficient service. You can expect your package to arrive in 1-2 working days. Please note that a signature may be required upon delivery to ensure a secure receipt.
In the case of special order items, the delivery time may be longer. If you have any concerns or questions about the delivery of your item, please don't hesitate to Contact Us. We are here to assist you.
Should there be any delay in dispatching your order, we will notify you to keep you informed.
Please be aware that The Widescreen Centre cannot be held responsible for any postal or third-party delays that may occur. We are committed to providing a reliable and efficient delivery service for our valued customers.
For more information please click here
.jpg)
