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Manufacturer: Askar Sharpstar
Product number: AS108RED
EUR489.00new
EUR 489,00
incl. 19 % VAT (DE)
The VAT indicated refers to that applicable in Germany. After logging in, the VAT amount is adjusted to the applicable VAT of the stored delivery country. Therefore, the final price may vary accordingly.
excl. 6.95 € shipping costs (DE)
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- Details..
- Technical data..
- In the box..
Askar F3.9 Full-frame Focal Reducer for FRA600/5.6
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 much larger.The reducer was developed for use with the FRA600 flatfield refractor and offers good correction with this telescope, even when full frame 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. The reducer can also be used with other flatfield apos from 100 mm aperture, provided that they have the corrector in the tube and not in the focuser.
| Suitable for: | FRA600 108 mm f/5.6 flatfield apo |
| Focal length reduction: | Factor 0.7x |
| Working distance: | 55 mm from the M48x0.75 connection thread |
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Cleaning & Collimating
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Reviews
Written by Arvid Feldhusen
on 2023-10-07
"Not perfect like a Takahashi but perfect for me. Good value for the money and wonderful for my kind of astronomy (where pleasure is more important than absolute perfection)."
