John Celio wrote: > Speaking of teleconverters, does anyone know what, exactly, the advantage > would be in using the longer telecons (the ones made for telephoto lenses > only) instead of the more compact ones (made for use with any lens)?
My understanding is that they're better matched optically to the longer lenses, but I'm not quite sure what that means. I'm no optical engineer. :-) My guess would be that for longer lenses, the light "rays" coming out of the back of the lens are more nearly parallel than on shorter lenses, and this allows them to optimize the light path better than if they had to assume receiving light from lenses of any focal length. -- Thanks, DougF (KG4LMZ) -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
