Godfrey is confusing M42 autoaperture support with M42 AV autoexposure support. The pentax DSLR bodies can do AV autoexposure support but not autoaperture support which sucks. But at least if you have the AV autoexposure support its always accurate. you will get correct exposure all the time whether you stop the m42 lens down or not (forget to). jco
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Godfrey DiGiorgi Sent: Wednesday, February 14, 2007 2:19 PM To: Pentax-Discuss Mail List Subject: Re: Pentax K 28mm f2.0 Lens On Feb 14, 2007, at 10:58 AM, Kostas Kavoussanakis wrote: >> Pentax DSLR's with M42 lenses (which >> offer metering only via the green button hack or DoF preview > > Is that true with M42s? I thought that it meters fully in Av mode > without any user intervention. No K mount (or other bayonet mount, with adapter) body can operate the M42 automatic diaphragm mechanism. Using the Pentax DSLRs with M42 lenses and adapter: - In Av mode, you stop down the lens manually, then the metering system does its job automatically to set exposure time when you release the shutter. - In Manual mode, you stop down the lens manually and then press the green button to set exposure time. Release the shutter at your discretion. The K10D gives you the option of making a digital preview with which you can check exposure, with either a histogram or a blinkie display for saturation and underexposure areas. G -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
