IR/UV filter, Leica or B&W?

Hello
B&W is a very high quality filter. I have one on my 90mm lens. I have the Leica on my 35mm lens. I learned the other day that Heliopan makes the filters for Leica. They are also of excellent quality. Even with the price difference the the Leica (Heliopan) is clearer. The way that you can tell is to put each filter on a magazine and read the words. The B&W seems to be a little distorted. Hope this helps.
 
Thanx guys. I just ordered B&W from BHphoto for my Ultron. The Leica one is way to much for my wallet at this time 🙁 110$ with shipping for the B&W, then I´ll have to pay 24.5% taxes as well when it arrives 😡
 
I have mostly Heliopans, with a couple B+W and several Leica-branded filters. There may be a color balance difference measurable with software, but since I've never seen it with my eyes in an objectionable degree, I've never pursued it further. One thing I have discovered from experience is the anti-reflective coating on the Heliopans is far superior to the others, and lessens the possibility of flare.
 
Gosh DARN! Those filters are pricey these days. I never could detect any difference in actual us between Leica filters and Hoya filters and who-knows-who-made-'em Spiratone filters. Maybe this is a project for Raid?...for when he runs out of lenses to test.

My own collection was mostly bought second hand before anybody ever heard of multi-coating, although I bought my FL-D when it was first introduced and it might be multi-coated.
 
I have both Leica and B+W IR/UV filters. As others have said it is hard to see a practical difference. Before the M8 I always used B+W for CPL and UV filters. It's difficult to imagine a need for higher quality than B+W produces. Recently a friend gave me some Kenko IR cut filters. They are labeled Multi layered coating. By appearances they look like the Leica filter glass. Did not get a chance to try them yet but, the price is less than 25% of the B+W filters. Am I correct that Kenko is owned by Hoya/Pentax...etc? Don't remeber clearly but it seems there is some connection :?
 
I have 46mm filters from Leica on the M-Hexanons 28mm and 90mm, a 40.5mm B&W filter on the M-Hexanon 50mm, a 62mm B&W filter on the M-Hexanon 50mm f1.2.

Never found any difference that could not be corrected easily in Lightroom.

The 62mm filter annoys the hell out of me, its rim is slightly less wide than the original Konica filter, so the lens cap won't grip anymore. Switching the lens from the film M's to the M8 now also calls for switching the lens cap. All other caps still grip sufficiently, but both Leica and B&W filters have rims slightly less bold than those on B&W UV filters, which provided perfect grip for all caps.

Might be something to consider.
 
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