Thanks Sandy
It's just me, the DSLR, a tripod and the mask.
I use a mask on my ED80 with no problems at all. It sits at the end of the dew shield - so, a good few inches from the lens of the scope.
I've made up a little shield to hold the mask an inch or so from the DSLR lens figuring it needs a gap between the lens and the mask in the same way the scope works.
All I get is the baht mask lines on the star instead of the 3 rays to aid focussing.
Then I tried the mask directly on the lens with the same results.
???
cheers
Niko
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