Orion with astrotracer miscalibration fix

Started Dec 10, 2017 | Discussions thread
chris gunn
chris gunn Veteran Member • Posts: 8,606
Re: Some more tests

Polacofede wrote:

last night, from my backyard

34 shots, iso 1250 (i think), 60s, FA*400 @5.6, i need more light and less pollution

I've only tried this with a k135, and this is certainly better.

thaks! btw, what is a K135? the SMC Pentax 135mm F2.5 ?


I'm wrong though, it was the K200/2.5 with a step down ring => f/3.2 for 220s integration.

Red or purple halos everywhere. And it didn't focus to infinity (I had a lens tech max the focus).

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