Wont work because there is no way the camera knows You changed the apeture setting unless the aperture Is stopped down all the time and its not ( that would Drain the battery if they tried that as it's a solenoid If I am not mistaken ). jco
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of P. J. Alling Sent: Tuesday, October 17, 2006 1:13 PM To: Pentax-Discuss Mail List Subject: Re: K1D aperature simulator survey, part Deaux I think you're being too complicated. How about this. Call it auto stop down compensation 1.) Mount a K lens. Or take an A/F/FA off A position. The Camera automatically senses this. 2.) Set the mode dial to Av, if it's not there already. 3.) Press the green button. a) The camera takes a meter reading and temporally records it. b) The lens stops down to taking aperture and makes a reading subtracting the EV value from the temporally stored value. The camera now knows the difference between wide open and the current F stop set on the lens. Now every time you take an exposure the camera calculates the proper exposure based on that offset. (It and also display an estimate of over or under exposure in the viewfinder). No extra dials or buttons to press. If you change the aperture you get instant exposure compensation. If you change aperture and don't want exposure compensation press the green button again. Make this type of operation a menu item in the custom menu with a default to the Av behavior. Basically an aperture simulator for Av all done in software. The only problem is that you might run out metering range, but that's true of using the green button Kludge now anyway. Cory Papenfuss wrote: >>> Of course it's academic since it's not an option with the current >>>firmware, but I don't think it would be too bad. The +-EV only works >>>within 3 EV from wide open, and even then you have to do the math of how >>>many stops you are from wide-open. >>> >>> >>Or 6 if you calibrate on 3 stops up from open-aperture. I have done >>it, Cory, it's a pain, even without having to go into a menu to >>indicate the aperture. >> >>Kostas >> >> >> > I still think that's more confusing than what I'm thinking. The >most annoying thing is having to set (somewhere) the maximum aperture of >the lens... I'm thinking a "button+wheel" maneuver in P or Av mode when >you mount up a K/M lens. Firmware could "blink" the aperture (e.g. '1.4') >to let you know you set it. After the lens is mounted and max dialed in , >you just have to dial the wheel to match what you've set the lens to. It >saves having to mentally do the math, allows open-aperture metering all >the way to the min aperture of the lens, and doesn't require the "GB >trick" evertime the lighting changes... only that when you move the >aperture ring on the lens you match it with the dial. > > How exactly do you get 6 EV? > >-Cory > > -- > >*********************************************************************** ** >* Cory Papenfuss, Ph.D., PPSEL-IA * >* Electrical Engineering * >* Virginia Polytechnic Institute and State University * >*********************************************************************** ** > > > > -- Things should be made as simple as possible -- but no simpler. --Albert Einstein -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
