Quote Originally Posted by ic-racer View Post
You don't have any way to measure it? I think the slip-on caps are around 52mm. B&H has caps. About the time of the SL3003 they went to a cap that clips on the 49mm threads, if you want to go with the later style.
Did a quick survey without leaving the chair: Starret 6" machinist's scale, one side in 64ths the other in 100ths; Stanley tapemeasure, inch & metric, plastic no-name 12"/30cm rule, I can't be that exceptional...