So looking to expand my filter collection as most of the filters I have were geared towards my back in my b&w film days, so mostly Reds, Oranges, blues, etc. After looking around a but I noticed there are a lot of low budget filters that have come to market but come to find out they are usually acrylic (hence the cheap price). So I thought to pose this to my forum friends here and see if anyone has a brand of choice they could kindly recommend or link me too. Im looking for some good real glass filter sets or if you have had good experience with the acrylic sets, link that too. Im mostly looking for ND and Polarizers for daytime shooting. Oh also variable filters are of interest as well. Thanks!