>>3993776>As to the Sigma: if you can get a 50mm ART in good condition at that price, jump on it. I've never seen them that low.you do realize that Sigma made lenses before the Art line, or are you just retarded?
>>3993727seems dumb. in a studio you have all the time in the world to fuck around with threading things you need to. in the field, if the filter gets bumped the magnets will become unaligned and it'll fall off on to the ground. its for people who got a filter stuck once and were too cheap or retarded to buy a set of filter wrenches