Some of you have seen my 7x50mm binocular with internal broadband LPR filters. These are simply Orion .965" broadband filters screwed right onto the plastic eyepiece field stops of the eyepieces. The size match was perfect on this binocular. I paid about $30 for the binocular some years ago, and $20 each for the Orion filters, on-sale at the time. Total investment of $70 for a bino with nebula filters. Orion has these on-sale again for $18.88 each. Go to http://www.telescope.com/ and click on "site map". From there click on "clearance", from there "accessories". You'll see it on the first or second page. #05661. I checked the fit on my 10x50mm binos and here some shimming with Teflon tape would be needed, but the install would still work. I haven't taken the eyepieces out of a pair of 15x70mm yet but am sorely tempted! BTW you can remove the eyepieces from just about any center focus, porro prism binocular without affecting collimation by removing the rear hinge screw and simply lifting them off in sequence. Reassemble the same way. Collimation will be the same as before disassembly. A clever individual could devise a way to hold the filters in the eyeguard, perhaps with a foam-rubber adapter ring. The views with the 7x50mm binos + filters are neat, but the magnification is really too low for most objects. We'll see how big a bino I can talk myself into attempting the "graft" with. There is a slight loss of field on the 7x50mm, if it is excessive on a larger bino then perhaps the outside mounting method is the best after all. C. __________________________________ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/