Quote:
Originally Posted by gaseous
Hi all,
I've been toying with the idea of getting a 2" filter wheel or filter slider for my 16" collapsible dob. I've previously had a 1.25" filter wheel for my 8" dob with limited success due to lack of in-travel, which I'm currently revisiting with a few modifications. Do any of the clever people on this forum have any opinion as to whether a wheel or slide would be the better option for the 16", or whether both are a waste of time/money due to inherent dob focuser issues. Not really looking (at this stage) for a slider which mounts inside the OTA. Cheers.
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If you only have a couple of filters, you could screw them onto extension tubes and then put the eyepiece you want to use in the extension tube and then rack it inwards.
Good if you have enough "in focus" travel.....not so good if you don't.