Originally posted by eddie1960 So i answered 27earlier, but tonight i looked and there are a few i forgot about, so reality is 32. that's gotta be a danger sign
It's time to build a spreadsheet. For each lens: Make, model, type (prime, zoom, TC, enlarger, etc), mount (M42, K0, T2, KM, KA, KAR, etc), focal length (FL range if zoom), max aperture, min aperture, aperture type (manual, M/A, preset, auto, etc), focus (manual, auto, none), near-focus distance, iris blades, front thread, weght, serial number, notes, origin, total cost (including shipping). I should have included purchase date, but what the hell, it's too late now. For those disposed of, I add fields for sales price and profit/loss.
NOTE: K0 (zero) is what I call K mounts with no aperture linkage, like lens-in-a-caps and some mirrors. T-mount is a subset of K0.