At 09:18 09.11.01 -0600, you wrote: >Lets not forget in this discussion of the maximum f/stop of a >lens that the f/stop measurement is taken from the relationship >of the entrance pupil and the focal length. The actual diameter >of the front element is not part of the equation. >William Robb
How can the entrance pupit be BIGGER than the the actual front diameter? I don't think that this is possible (the opposite is sometimes the case). Knut - 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 .
