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Zwo
Mar 14, 2017 10:59:43 GMT
via mobile
Post by davy on Mar 14, 2017 10:59:43 GMT
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Post by ChrisV on Mar 15, 2017 12:18:33 GMT
Its based on the Nikon D810a sensor, a big 37megapixel monster
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Zwo
Mar 15, 2017 13:03:43 GMT
Post by Dragon Man on Mar 15, 2017 13:03:43 GMT
That looks like a HUGE sensor!!!
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Zwo
Mar 16, 2017 20:15:03 GMT
Post by Rick in NWArk on Mar 16, 2017 20:15:03 GMT
Really need to start thinking about how to go to a 2" system for these big cameras.
2" visual back, 2" filters, 2" reducers. Uggh.
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Zwo
Mar 17, 2017 4:18:46 GMT
Post by Dragon Man on Mar 17, 2017 4:18:46 GMT
Rick, yes larger openings really help prevent Vignetting and Coma. For big sensors I put those cameras in my 6" Refractor because it has the Astro-Physics 2.7" focuser. Makes a huge difference. I also have a 2.7" 0.7x Focal Reducer for it. I attached a 2" nosepiece as well. The light cone needs an unrestricted path. When I used the RT 4/3rds camera there was Vignetting in all my scopes except the 6" refractor with the 2.7" focuser.
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Zwo
Mar 17, 2017 8:06:55 GMT
Post by ChrisV on Mar 17, 2017 8:06:55 GMT
I've got 2" and T-threads for everything. There's still a bit of vignetting with a dslr sized sensor. And this new one looks twice as big!
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Zwo
Mar 17, 2017 11:46:44 GMT
Post by Dragon Man on Mar 17, 2017 11:46:44 GMT
I've got 2" and T-threads for everything. There's still a bit of vignetting with a dslr sized sensor. And this new one looks twice as big! The width of the 2.7" Focuser helps Chris. By the time the light path gets to the T-thread it is narrow enough to pass unobstructed. The problem is before it gets to the T-thread. 2" Focuser barrels usually intrude into the light path on big sensors. The chap I got my 2.7" focuser from used it with Full Frame cameras and it did great
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