Manufacturer: Askar Sharpstar
Product number: FRA400Red

EUR 369,00


incl. 19 % VAT (DE)  
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excl. 6.95 € shipping costs (DE)  
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Product expected to be available from 30.04.2024

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  • Details..
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  • In the box..
Askar F3.9 full-frame focal reducer
The new Askar FRA400 F3.9 full-frame reducer reduces the effective focal length of the telescope by a factor of 0.7x. The original f/5.6 apo becomes an f/3.9 apo. Its exposure time is significantly shorter, it is reduced to about 50%. The field of view becomes considerably larger.

The FRA400Red was developed for use with the FRA400 and FRA500 flatfield refractors and offers good correction with these telescopes, even when full-frame size sensors are used. The working distance from the M48x0.75 thread to the camera sensor is 55 mm. The camera adapter is equipped with a 2" filter thread.


Video: Mounting the reducer on the telescope




Excellent image quality
The ]shot was taken with a FRA400, the reducer and a ZWO ASI6200. The total exposure time was two hours.


Suitable for:FRA400 and FRA500 flatfield apo
Focal length reduction:Factor 0.7x
Working distance:55 mm from the M48x0.75 connection thread
Intermediate thread:M58x0.75 external thread
Working distance from the M58 external thread:71.8 mm
Length of the M58x0.75 thread:5 mm
Length of the reduction adapter from M58 to M48:16.6 mm
Askar Reducer



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Reviews

Written by Severin SCHMITZ
on 2023-10-10

Super