On Sun, May 18, 2025 at 09:57 AM, Will wrote:
Well I wanted to buy the new 220mm, but my dyslexic eyes did me in :-)
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I am not familiar with the Celestron OAG specs but IMHO the best ZWO autoguider camera for use on an SCT with a ZWO OAG-L is the ASI174MM mini.? The large 12mm prism is a perfect match for the ASI174MM mini as they have almost the same rectangular window opening dimensions.? The ZWO OAG-L is also obviously well suited to the entire ZWO/ASIAIR ecosystem so down the road you will have the best options with future ZWO cameras and accessories.? I had this setup and it worked fine on refractors and SCTs but I am using shorter focal length optics and can guide very well using a piggyback autoguider for up to 2,000mm FL.? I will not likely be guiding past that so I plan to sell the ZWO OAG-L.? ??
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Chip Louie Chief Daydreamer Imagination Hardware?
? ?Astrospheric - South Pasadena?
Chip Louie