Quote:
Originally Posted by Merlin66
Mick,
Making a sub diameter filter is OK (just make sure the support frame covers ALL the aperture and is firmly fixed).
Based on the experienced solar observers over on solar chat http://solarchatforum.com/
the sweet spot for aperture - based on seeing conditions - seems to be around 5" (125mm) |
Thanks for that, so I should be okay with the 20cm wide film. I do understand your advice that whatever I make needs to cover the entire telescope width and be securely attached.
Out of interest: I know the ND 3.8 is not to be used for visual. If the solar film got damaged could it ruin the camera or damage the telescope mirrors in some way?
Thanks
Mick