I have a split image screen installed in my istDS. It doesnt effect metering when metering wide open, but if you use stop down metering (green button) with K/M lenses AND you are using a small f-stop like F8 and beyond, the dark spot in the center of the screen throws off the metering a little ( tends to overexpose at small fstop settings). This non linearity with stop down metering is probably why Pentax doesnt offer split image screens. But for me, the split image is GREAT for manual focussing and I dont really use the green button metering much anyway so I prefer the trade-off heavily. The stock screen sucks for manual focussing.
JC O'Connell [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Cymen Vig Sent: Thursday, November 20, 2008 11:06 AM To: Pentax-Discuss Mail List Subject: Re: Focus screen question Given that lens adjustment got into the K20D, perhaps Pentax would consider adding a "base meter adjustment" setting? The value is simply that stock screens are too bright and have an "aperture view" of perhaps f2. A more matte replacement screen would allow more precise focusing. There are some screens, like the KatzEye, that claim not to change the metering. But the matte surface of the KatzEye screen is reputed to be very close to stock while other split-prism focusing screens offer a more matte surface (but apparently affect metering). Or does this feature exist? It would be excellent if the introduction of this feature included the announcement of a split-prism focusing screen from Pentax. Cymen On Thu, Nov 20, 2008 at 9:45 AM, P. J. Alling <[EMAIL PROTECTED]> wrote: > They both use the same prism so I would assume yes, I've never tried > it though. Remember the metering is off the focusing screen so it > will require an adjustment of the exposure bias to compensate. Not > like the good old days where you could adjust the ISO... > > Jaume Lahuerta wrote: >> Is it possible to fit a focus screen made for a K10D into a *ist Ds? -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
