> 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.
The entrance pupil is always smaller or equal to the largest lens in the system, so there is still a problem. Frank > William Robb - 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 .
