Celestron retaining ring, the adapter that attaches to the telescope end of RASA 8 has lot of tilt issues due to lot of give in the adapter. So, I plan to go baader route.
Please help me with the backfocus. I am planning to attach ASI294MM to it.
Baader UFC S70 RASA 8" Telescope-Adapter (optical height: 1.4 mm)
Baader UFC Base (Filter Chamber) telescope-sided S70 dovetail receptor (optical height: 13 mm)
Baader UFC 2" (M48) Filter Slider
Baader UFC T-2 (m) Camera-Adapter (optical height: 2 mm)
This makes up to 13 + 1.4 + 2 = 16.4mm. For 29 mm I need to add 12.6mm. How can I achieve this? I have attached a photo from baader website comment section but I am not sure if I can attach 11mm ZWO adapter or maybe he is referring to SKU: N/A adapter (6mm) adapter ring instead of 11mm that comes with the camera.
I am guessing 29mm is with the celestron clear filter and if I were to remove it the backfocus becomes 28mm, and I need to attach a 5mm spacer instead. Is that correct?
Also does the Baader UFC 2" (M48) Filter Slider accept 2'' filters from Astronomik?
PS: The tilt of up to 8% is fine with me, I am not too much concerned about a very small tilt
Edited by radix655, 22 September 2021 - 08:50 PM.