On 03.6.8 0:10 AM, "Gary L. Murphy" <[EMAIL PROTECTED]> wrote:
> After 18 years in the aerospace industry, that is exactly correct, Bruce. I do not pretend to be a know-it-all, and leave everything to an expert like you :-), but I thought the aircraft aluminum was usually designated by 7075-T6 (never mind the number itself as I made it up) for the highest strength "alloy" content and then forged (and perhaps tempered again for the stress relief). But again, my knowledge is rusty and this whole discussion is irrelevant to the lens barrel argument (for now). Now I do not understand why this element was thrown in :-). It's late in the night and I realize I was dragged into this and too bogged down for the aircraft Al and lens barrel issue :-). Cheers, Ken
