the 49 dollar set at best buy or even on amazon gives you good filters from polarpro at the cheaper price. its only a few bucks more than what youre think of getting.

https://www.amazon.com/PolarPro-Filter-3-Pack-Optical-Filters/dp/B073G9X7TR/ref=sr_1_4?ie=UTF8&qid=1527040779&sr=8-4&keywords=polar+pro+spark+filters