ard at p850ug1.demon.co.uk
Fri Sep 24 16:32:04 CDT 2010
> 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
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.
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