I assume you are talking about the finderscope. I don't know anything much about your particular finderscope. I assume, according to the specs on the web, that it is a 10x50mm finderscope and that it already has an illuminated EP.
If the finderscope has at least a 200mm focal length, then the EP that comes with it is probably about 20mm. 200/20=10x.
It would defeat the purpose of the finderscope in using a 9mm EP as this would change the finderscope into a 22x50mm with a much narrower field of view. I am guessing that the finderscope would not have enough in focus with the diagonal to go from a 20mm down to a 9mm.
Regards, Rob
|