24 Sep
2010
24 Sep
'10
2:32 p.m.
Anyone who plays a brass musical instrument with
piston valves knows
the technique because of the nature of valve end-caps. They're
usually somewhere around 3/4 - 1" in diameter with fine machined
threads--the danger of cross-threading is great. However, turning
the cap anti/counter-clockwise until one hears the "click" ensures
success.
I do it without thinking when screwing filters onto camera lenses (0.5 or
0.75mm picth threads, 50 or so mm diameter). I guess most photogrpahers
know to do that.
As I seaid early, it;s second-nature to me now. I probably do it on all
sorts of fittings without thinking about it.
-tony