glass is very dense and I don't think they are going to be so very small as to weigh less than 7 grams for a group of them not even counting the cell to hold them together as a group...But this is drifting into conjecture because I doubt that me, you, or anyone else can come up with the mass specs. for the IS moving elements in all the currently availble IS lenses on the market.... JCO
-----Original Message----- From: Rob Studdert [mailto:[EMAIL PROTECTED] Sent: Thursday, October 14, 2004 7:16 PM To: [EMAIL PROTECTED] Subject: RE: Minolta Maxxum wth BODY IS On 14 Oct 2004 at 18:41, J. C. O'Connell wrote: > Are you trying saying that a moving lens cell in a tele lens (most of > the IS lenses are longer teles and zooms) with several glass elements > and a cell to hold them weighs LESS than 7 grams? No. I'm saying that the the CCD alone is 7g therefore the assembly has to weigh considerably more. Look at any typical IS lens cross section and you'll see quite plainly that the corrective elements are always quite small relative to the lenses max aperture, they have to have low mass obviously. Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
