Paul: > The Helios 40 and 40-2 is definitely a different lens. I don't know its > optical formula, but its diaphragm has 12 blades, it weighs 900 g, and it > uses 67mm filters.
This K-mount Zenitar 85/1.4 uses 8 blades. (In fact, you can see the octagonal diaphragm opening in http://www.cetussoft.com/pentax/zk85f142.jpg , along with the 9-sided opening - is that "nonagonal"? - of the A* 85/1.4 - both lenses were set at f/8 for the picture.) > The Jupiter 9, another 85/1.5, I have no specs on. Nor I... Fred - 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 .
