I recently recieved a new WO GT71 f/5.9 refractor (for both night and day use), a Daystar Quark Chromo filter and a UV/IR cut filter. I intend to use it both for visual solar Ha and for imaging with my ASI290MM and x0.5 reducer (between the Quark and the camera).
I am still waiting for an opportunity for first light. In the meantime, I re-read some suggestions that I saw and want to be prepared. I understand that f/24.8 is a little less then recommended, so I started to think about aperture mask.
A few questions for the experienced observers:
1. Is the lose of resolution really worth the added contrast?
1. If so, will masking to 60mm (yielding f/7 and therefore f/29.3) be good enough?
3. How do you suggest to prepare the mask? Will a 3D printed disc with 60mm hole that can be inserted into the OTA do the trick?
Edited by YossiZ, 26 January 2022 - 03:01 PM.