Mark Roberts wrote: > BTW: http://www.robertstech.com/filters.htm > > There seems to be a hiccup threequarters of the way down the A lenses (35-80) and, following that, some of the numbers seem wrong. Assuming the numbers should move up one, does the 50/2.8 macro really have a 145mm thread? I'm sure the 70-210/4 doesn't have a 112mm.
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