Can't put filters on the webcam at the moment but I have ordered a couple of internally threaded eyepiece barrels from SurplusShed. The webcam body is tubular and just 0.5mm smaller in diameter than an an 1 1/4 eyepiece so I should be able to fit the internals inside one of the barrels. Fun this ATM stuff, innit
Just had a thought and found that with the application of a little thread tape an 1 1/4 IR filter fits neatly inside the end of the Webcam body (original filter was removed with the lens housing). With a bit of clear sticky tape applied to the outside for extra security I now have a thread to attach more filters
Cheers
Bill