hello when I was trying to find a filter for my DSLR I was kind of confused because the sales pages kept saying these filters are for visual use and I know what they meant you would just take the filter and you would attach it to the end of your eyepiece like so but I wanted to use it for my DSLR and it finally occurred to me oh I need the 1.25 adapter for my DSLR to fit that onto it so hook it up to your DSLR all you do is um they take your DSLR as usual you apply your t ring to it I can detach that let's see should snap in okay you hear it click and now you then attach your 1.25 inch adapter to the tubing it should screw right on here I'm having some difficulty okay now I don't normally attach my DSLR to my my telescope with a 1.25 inch adapter but this is really my only alternative alternative for now if I want to use this Bader filter and then you just take the filter screw it on like that and now just plug this into the eyepiece hole of them the telescope and you were all set with your Bader filter I'd prefer a filter that I could snap inside the DSLR then I don't have to even use this this adapter here but I don't know if one exists for my Nikon come that's the scoop hope there's help