Using a Canon EOS Lens with ZWO Filter Wheel. Use Stepdown Rings for Aperture!

Canon EOS lenses can make great astrographs however the backfocus is limited to 44mm.  ZWO has an EOS filter drawer adapter which I showed in a previous video, however, they have another adapter which can be used with their 1.25 inch (31mm) filter wheels and a monochrome camera.  Also, in order to get the optimal star shapes, the aperture should be stepped down.  In a previous video I described a method for adjusting the aperture of Canon Autofocus lenses, however, there is a better way which I describe in this video.

Video is on my Youtube Channel!

Using a Canon 200mm & ASI294MC Pro

https://youtu.be/HczjqhoXANA

Cuiv, The Lazy Geek

https://youtu.be/D78P1h_a50Q

K&F Concept 18 Pieces Filter Ring Adapter Set

https://www.amazon.com/gp/product/B00JL4HGAI?ref=ppx_pt2_dt_b_prod_image

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