I can tell you about the screw mount lens: For the focal length it is light and very handholdable (at speeds about 1/250 if you are good); Very sharp, fast enough, easy to focus; typical screw-mount construction (high quality); minimal flare/ghost images Here are some photos made hand-held: http://whitemetal.com/kids_09_2000/airshow_08_2000_06.htm <http://whitemetal.com/kids_09_2000/airshow_08_2000_06.htm> http://whitemetal.com/kids_09_2000/hangar_08_2000_01.htm <http://whitemetal.com/kids_09_2000/hangar_08_2000_01.htm> http://whitemetal.com/kids_09_2000/airshow_08_2000_04.htm <http://whitemetal.com/kids_09_2000/airshow_08_2000_04.htm> I believe the early K-Mount version is the same optical layout. Paul M. Provencher, Senior Systems Engineer NICHD Tracking System - Technical Lead 703-575-6147 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 22, 2001 10:46 PM To: [EMAIL PROTECTED] Subject: 300mm f/4 Hello gang! Tell me what you know about the Pentax 300mm f/4. My brother wants one, should he buy it? Thanks, John - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
