Hi, Anybody know anything about these two Mamiya/Sekor Auto SX lenses ( 100mm F2.8 and 105mm F2.8 both Auto SX series lens with M42 ( Pentax Screwmount ) lensmounts?
http:/jcoconnell.com/temp/amsx100vs105.jpg The most obvious difference is the 4 vs 5 element optical design and the extra 5mm focal length but that doesn't really tell me what I need to know... Specifically, I found these both in same catalog but they are so similar it makes no sense that they came out at same time. What I would like to know is which came out first, was there a price difference, is there any optical performance differences, and is there any signifigant mechanical differences? I don't really want to have get both of them to find out. Any experts on the Auto Mamiya SX Lens series out there? ( WARNING - K mount bodies cannot use these lenses with an adapter because they have no means of setting the aperture manually with being modified - only wide open aperture is possible w/ PK bodies which is of little use in most cases ) JCO ---------------------------------------------------------------------------- J.C. O'Connell mailto:[EMAIL PROTECTED] http://jcoconnell.com ----------------------------------------------------------------------------
