----- Original Message ----- From: "Robert Woerner" < Subject: Aperture Blades on Different Lenses
> Does anyone know why the aperture blades are oriented differently on > different Pentax lenses? I was cleaning my M 50mm f1.4 and my FA 50mm f1.4 > and noticed this today. On the M lens the tips of the blades face forward > and the iris diaphragm appears "smooth" when viewed from the rear. The FA > lens is exactly the opposite. I hope this is an adequate description of my > observation. You should see the shape of the aperture on the bellows 100mm lens. It is a really odd shape at middle apertures, and give an intersting bokeh effect. I will post a couple of pictures at some point. 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 .
