Thread: [WITHDRAWN] Optec Pyxis Camera Field Rotator
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Old 13-12-2018, 04:19 PM
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gerry aarts (Gerry)
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gerry aarts is offline
Join Date: Dec 2005
Location: Penrith, Sydney, Australia
Posts: 73
The field derotator compensates for field rotation in AltAz scopes.
Exposures up to 5 minutes are possible.

Having said that, there is no substitute for a well aligned EQ mount for Astro photography where you can do much longer exposures.