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Yeah thats a tricky one George, I think a filter wheel or a filter holder is the only real solution.. I was going to ask if you were using the flat68 on the FLT...
Lumicon make a filter drawer that is T threads on both the telescope and camera side, it has a drawer that you screw your filter into, then drop the drawer into the holder.... I dont know if anywhere in australia advertises these, but you'll find what im talking about if you google for "Filter Drawer"
Price wise I think its cheaper to buy the Orion 2" manual filter wheel. The problem with that is, If you add the filter wheel between the flat68 and the DSLR, you will not have the correct spacing between the flattener and the camera sensor, which means you'll end up with a curved field of view...
Just wondering, what mount do you have the FLT132 riding on?
Alex.
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