----- Original Message ----- From: "Don Sanderson" Subject: RE: Seen on eBay
> Uh guys, maybe I'm missing something but unless someome is lying > about their product isn't f/4.0 always supposed to be f/4.0?? > It'd pretty much leave slide shooters who use a manual meter SOL > if it wasn't, wouldn't it? The f-stop is a mathmatical calculation of actual aperture size vs. focal length. It says nothing about the transmissive abilities of the glass. William Robb -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
