Filters for lens protection seem to divide opinions; however, I’m strongly in favour of them. Not only do they prevent fumbling with lens caps (keep those for storage), but they’re also a lot easier to clean than the front element. I also don’t like cleaning lenses and would rather accidentally scratch a filter than my lens. And if you think it’s unlikely, consider the number of secondhand lenses for sale on eBay with scratched front elements. Those few that aren’t sell for appreciably more. Fingerprints are another issue. They are both greasy and contain an acid that damages coatings, and so should be removed promptly. My filter of choice for…