On 9/12/06 5:03 PM, "K.Takeshita", <[EMAIL PROTECTED]> wrote:
> It would be a dovetail-like groove to which the rubber O ring is pushed in and > only a very slight amount is protruding outside. Someone questioned if all lenses could be sealed. That's a good question because the retaining the O ring on a flat surface might be a bit of problem. Machining even the slightest dovetail on the mount surface would be costly (unless they use two plates), and taking a good look at the sealing diagram in Steve's Digicam, it might also look like a circumferential seal in which case the installation and the replacement of a rubber O ring is very easy. O ring on the mount surface might also be messy when it breaks. If circumferential, the lenses have to have some sort of extension collars to cover the seal. I wonder how canon is doing it. In any case, everything will be known soon. Ken -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
