Optec Pyxis Camera Field Rotator

[gerry aarts]

Optec Pyxis Camera Field Rotator
To buy new from Optec in the USA plus shipping & Gst it would cost in excess of $770USD = $1100AU.Asking price:$390AU. You pay for shipping.This unit is is like new condition.
(see attached PDF below fo more information)

[Mokusatsu]

I've never done imaging, but I'd like to start. Forgive the dumb noob question...

Will this compensate for field rotation, allowing a dobsonian scope with alt-az tracking to take long exposures?

[gerry aarts]

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.

[Mokusatsu]

That sounds like something I could use! My scopes are an equatorial mounted refractor, and a goto dob. I hope to buy a really big dob next.

2" focusers on both. Which of your two field rotators would suit me?