Quote:
- Purchase a low profile focuser (way too expensive and not worth it)
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It is worth it.
The idea is get the camera sensor as close as possible to the secondary mirror.
This will allow better illumination of the sensor at it's edges.
You need to use a program like this:
http://www.dalekeller.net/ATM/newton...t/newtsoft.htm
to work out dimensions & be able to check for illumination & vignetting.