Quote:
Originally Posted by avandonk
The Canon 300mm F2.8L has a rear 48mm filter holder as do all the super telephotos from Canon (some have 52mm). Same thread as an eyepiece. This slot also takes a circular polarizing filter which can be rotated by a small wheel from the outside. You can see there is method in my madness. I don't think a 110mm LPR filter would be cheap or even available.
Bert
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So basically you can use any of the 2" filters that we use in our scopes for use in the 300mm as well, is that right or did I missunderstand?
I knew about the drop in filter on the 300mm but I thought it was only for geletin type filter usage.
And Bert, am I right that your lens is the non IS version? (from memory).