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Askar FRA300 60mm f/5 Petzval Astrograph OTA

Askar FRA300 60mm f/5 Petzval Astrograph OTA
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 Askar FRA300 60mm f/5 Petzval Astrograph OTAAskar FRA300 60mm f/5 Petzval Astrograph OTA 
Price:  £949.00(Inc. 20% VAT)Earn 949 Loyalty Points
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Model:  ASKR-FRA300
Brand:  Askar

Availability:  

  

Generally In Stock, Please Confirm Before Ordering



2 Year Warranty On All New Items
(Excluding Batteries & Globes)



Since their inception, Askar FRA series short focal ratio astrograph have been very well received by astronomical amateurs. This year, we launched the FRA300 Pro —— the smallest 60mm F/5 Petzval astrograph with the fastest native focal ratio in the FRA series so farwith a focal length of just 300mm. The star is sharp and delicate.At the center of its field of view, the RMS radius can reach 2um. Even a serious user can also be satisfied when it comes to the shape of stars.It performs excellence with full-frame and supports 44mm imaging,which is a rare astrograph for amateur astronomers.Compared with F/6 or F/7,F/5 can effectively reduce the exposure time,helps you get the same exposure in less time.In addition, the entire OTA is compact, making it the portable choice for field photographers.

FRA300 Pro 's objective lens adopts a quintuplet fully air-spaced structure, including one piece of ED glass,it also adopts a fully-multi-coating to effectively remove stray light.
In particular, the rear group lens adopts the two pieces of far-separated refractive lenses, which improves both the star quality and the aberration correction performance , and has a very good control of full-frame peripheral light reduction.

Thanks to the native Petzval design, the user does not need to calculate the backfocus, as long as the focus is within a certain range is the optimal position.

Mechanically,FRA300 Pro is assembled with high-quality CNC-machined components , wrapped with smooth spray coating and light oxidation process,both beautiful and practical.The tube ring design is equally lightweight and stylish.Despite the increased cost, we want enthusiasts to use the FRA300 Pro that perform well in every way and are considered in every detail.

The focuser is 2.5"rack-and-pinion focuser, which is solid and beautiful.It's designed with dual-speed hand knobs, twin knobs for coarse adjustment and a fine adjustment knob to accurate the focus, equipped with a universal M48X0.75 thread adapter. There are also two separate M54X0.75 and M48X0.75 adapters in the standard kit for easy access to a variety of imaging equipment and accessories. The end is equipped with a 360° rotator, which is convenient for users to rotate at any angle when shooting.

FRA300 Pro also comes standard with a multi-function handle and a 300mm vixen-style dovetail plate, which can be directly connected to various mounts and accessories, the multi-functional handle can also be connected to the universal vixen-style finder base.The 300mm dovetail plate allows the astrograph to maintain balance on the mount.

Specifications:

Aperture size:60mm
Focal length:300mm
Focal ratio:F/5
Objective lens:quintuplet fully air-spaced Petzval APO (including one ED glass)
Image circle:44mm full-frame
Maximum accessory connection (with the focuser fully retreated):
1. Imaging mode:
71mm (from the base of M42×0.75 male thread)
67mm (from the base of M48×0.75 male thread)
71mm (from the base of M54×0.75 male thread)
Total length:303mm
Net weight:2.26kg
Gross weight:3.12kg
Rear-end thread :M48*0.75 male thread
Standard package items:a tube ring, a handle, an Askar 300mm Vixen dovetail plate, a M42*0.75 adapters, a warranty,a manual

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Some items that are showing as in stock are in stock at our holding warehouses, not at the shop. To double check the stock levels at the shop, please contact us on 01909774369 or sales@rothervalleyoptics.co.uk.

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Rother Valley Optics

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sales@rothervalleyoptics.co.uk

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Rother Valley Optics Ltd is registered in England and Wales 04762707. Registered Office: 21 Station Road, Kiveton Park, Rotherham, S26 6QP. Rother Valley Optics Ltd acts as a credit broker only. Rother Valley Optics Ltd are authorised and regulated by the Financial Conducts Authority. Credit provided subject to age and status..

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- - - Rother Valley Optics Ltd

01909 774 369
sales@rothervalleyoptics.co.uk