Hi, I've got an iOptron tube I want to use as a guide scope but just realised it's missing the diagonal so there's not enough back focus. Anyone got a spare lying around for a bargain price?
I don't have an extension tube so a diagonal will perform the same function. My intention is to use this set up ans the guidescope for my ED80 piggyback style. I think it'll be a step up from the converted finderscope I have been using