Point about front element taken, but the front element is not THE single factor in deciding the weight of a lens. I have five lenses for the 645 system, and all of them are heavier, and bulkier, than their K counterparts.
Jostein On 9/2/06, Digital Image Studio <[EMAIL PROTECTED]> wrote: > On 03/09/06, Jostein Øksne <[EMAIL PROTECTED]> wrote: > > Then tell me, guys, > > Why are the medium format optics so much larger for corresponding > > focal lengths and max apertures? > > The long lenses aren't, I had a 400/4 for my 67, it didn't taper much > as the back end used the external bayonet but the front end was no > bigger than a 400/4 in any format. > > -- > Rob Studdert > HURSTVILLE AUSTRALIA > Tel +61-2-9554-4110 > UTC(GMT) +10 Hours > [EMAIL PROTECTED] > http://home.swiftdsl.com.au/~distudio//publications/ > Pentax user since 1986, PDMLer since 1998 > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
