Quote:
Originally Posted by SkyViking
there is literally zero focus shift throughout the night. I carefully inspect each subframe afterwards, so can say that with certainty.
If that still holds for, say, a 20" made of the same materials I don't know. But at this scale any expansion is evidently within the focus tolerance and not measurable.
The materials for my OTA (excl. optics and focuser) cost around $300 so that's decent value for money  |
Rolf, your rendition of 5128 is proof of the pudding.
That image btw, has been used as my desk top image since your last repro.
Imho, you set a new standard right there.