I use a 21 LImited for some group photos. The camera's autofocus likes to back-focus this particular lens, and it's wide enough that it is hard to tell by sight exactly what is going on. I found the best solution seems to be to use hyper-focus where I set the lens distance scale and shoot at f5.6 or f8 with flash.
The Katz-Eye focusing screen looks interesting, and I may try it out, but I'd prefer it to be a center patch of micro-prisms without the split image, such as the old K1000s have. The problem I have with the split image is that, at a glance, the center of the image looks sharp unless you notice that the edges are not lined up. The micro-prisms in the center make it obvious that something is wrong until you get it focused in. This is nice when working quickly. An even better idea, which I recommended to them, would be a micro-prism ring around a matte center spot. This leaves the center's exposure unaffected for spot metering and stopping down old lenses, since only the micro-prism ring would go dark, and yet you could use the ring to dial in the focus if needed. Brian -- Brian Dunn Photographic http://www.bdphotographic.com -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
