Manufacturer: Astrozap .. Tau
Product number: AZ-504

EUR 169,00


incl. 19 % VAT (DE)  
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Bahtinov Masks for convenient and exact focusing of your Astro Images
The Bahtinov Mask is named after its inventor Pavel Bahtinov. This focusing tool enables precise adjustment of your Astro pictures to the focus plane of your telescope or camera lens.

Attaching the Bahtinov Mask to your telescope or lens is very simple. Each mask is supplied with 3 screws. Remove the plastic from the screws, put them through the designated holes and then pull the plastic covers back over the screws. Now you can attach the focusing mask to your telescope or lens and start focusing.

This is how focusing of your camera on your telescope or lens works.




Attach the mask to your telescope and slew the telescope to a bright star.
Turn on your camera and watch your selected star on the live view screen.
If the image isn´t yet in focus, the central line of the Bahtinov pattern is shifted. Adjust your focuser until this very line sits exactly inbetween the other two lines.
Now you have achieved optimal focus. Remove the mask from your optics and you can start the exposure of your object.


Practical advice from Teleskop Service
Using a Bahtinov Mask for focusing works especially well for Deep Sky photography. Correctors and Barlow Lenses are not a problem.
Ideally you want to use a star with medium brightness for focusing. It should neither be too dark nor too bright. The lines of the Bahtinov interference pattern have to be clearly visible.
The chosen star shouldn´t be positioned in the center of your live view, because most telescopes or lenses, although corrected, do not produce a plane field of view. We recommend to position the star in the outer third of your image. That way, you will achieve a better overall sharpness across your field of view.

For Tube diameters:292 mm - 368 mm
Mask´s outer diameter:380 mm
Clear aperture:368 mm
Attaching to telescope:by hanging in front of dew cap or tube
Material:Plastic
1 Bahtinov Mask



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  • Only 3 pcs left in stock

EUR 38,90RRP EUR 49,00you save 20.6% (EUR 10,10)

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Reviews

Written by Malte Kreklau
on 2017-09-05

"Die Maske passt gut auf meinem 12"" GSO RC. Der Schärfepunkt ist schnell und zuverlässig gefunden. Wirklich stramm sitzt die Maske allerdings nicht am Tubus weil die 3 Halteschrauben zu locker sind und sich nicht arretieren lassen"