Posted By Randy Roy
I have a pair of Canon 15X50 IS binos and am very happy with them. They are threaded for 58mm lens filters. The other day on a whim, I ordered 58mm to 48mm step down rings for them. They came in today, so I screwed in my 2" UHC and O-III filters in and just came in from trying them out. I was concerned that mixing them would cause me some focusing issues, but I only had to tweak the diopter a hair. The skies are very clear tonight and the view of the North American was fabulous for such a small aperture. The wide field of the binos really makes the nebula stand out. The Veil was also very nice. Both sections were easily seen. I can't wait to get these to a really dark site.
Have any others on the list tried placing nebula filters on binos? I wonder how the Canon 15X50 IS binos would do with a couple of 48mm solar filters?