Heliopan filters are known for their outstanding quality. High-quality glass, scratch-resistant coating, brass mount. We can also order double-coated filters (SHPMC Series), which prevent reflection between the lens and filter. The scratch-resistant coating will hold up even after repeated cleaning. The brass mount is - almost always - the Slimline variety, so that there is no edge vignetting even with Wide-angle lenses. Brass is a soft metal and is "self-lubricating" - so the filter mount won't get stuck in place like with cheaper aluminum mounts.
If you need a Heliopan filter or adapter that we don't currently have on offer, we'll be happy to place a special order for you.