Backfocus help needed | Astrobiscuit | Page 1

sick furnace Jan 7, 2025, 3:00 PM

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Hi guys, I am using a ZWO ASI 183mc pro and want to use the skywatcher 2 inch coma corrector. How much working space do I need for the backfocus?

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https://www.explorescientific.com/de/products/explore-scientific-50mm-2-t2-camera-adapter

I have this adapter which I place between them

Explore Scientific

Erforschen Sie wissenschaftliche 50 mm (2 ") T2 -Kameraadapter 510365

Beschreibung Entdecken Sie den 50-mm-Kameraadapter von Scientific (2 "). Es ist perfekt für alle DSLR-Kameras, die sich an jedem Teleskop mit einem 2-Zoll-oder größeren Fokus anbringen können. Der Faden ermöglicht jedem Kamera-spezifischen T-Mount. Spezifikationen Artikelnummer 510365 Gewicht .15lb/.08 kg Durchmesser 76 mm Höhe 36 mm Garantie Be...

royal coral Jan 7, 2025, 3:08 PM

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99% of the time it's 55mm

sick furnace Jan 7, 2025, 3:56 PM

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Hm… only 5mm to go

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Thank you!

smoky palm Jan 8, 2025, 10:40 PM

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sick furnace Hi guys, I am using a ZWO ASI 183mc pro and want to use the skywatcher 2 inch co...

There are usually two adapters delivered with a ZWO camera, a 21mm and a 16.5mm spacer. If you install them all together, you should archieve 55mm‘s of backfocus.

smoky palm Jan 8, 2025, 10:42 PM

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sick furnace Hm… only 5mm to go

if you‘re going with another option (which for a color camera you really don‘t need), you also have to take account of the cameras own backfocus. The 183mc pro has I believe 6.5mm backfocus without any rings.

#Backfocus help needed