Quote:
Originally Posted by Poita
I'm loving these images that are starting to appear from the RH scopes.
What difficulties do you find imaging at f3?
|
Thanks! The only difficulty you will seriously encounter in a short-focal-ratio scope such as the Veloce or the Powernewt, is the fact that the Critical Focus Zone is very small. It's actually +/- 10 micron...
That means, that any small tilt in the imaging plane, will translate into part of the image not being in focus, while the other part is. The part not in focus will reveal all sorts of abberations, which are difficult to handle. Hence you will find yourself investing some effort at the beginning of each imaging session, to make sure that you eliminate all tilt from the system.
Accordingly, I have made a carrying case for the Veloce, which houses the camera together with the scope, such that there's no need to disconnect the two (and risk any change of imaging plane) prior to the next session. You can see the images here:
http://www.pbase.com/boren/image/148381443 and here:
http://www.pbase.com/boren/image/148381439
Cheers,
Harel