So why do you think it has to be stopped down? J. C. O'Connell wrote:
>Sir, You wrote quote : > > >>>" If you change the aperture you get >>>instant exposure compensation" >>> >>> >I did read it correctly. >jco > >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of >P. J. Alling >Sent: Tuesday, October 17, 2006 2:23 PM >To: Pentax-Discuss Mail List >Subject: Re: K1D aperature simulator survey, part Deaux > >Huh, didn't you actually read what I wrote? You don't change the >aperture between shots if you want it to work. The camera remembers the >difference between wide open and stopped down from the last time you >indexed the exposure. Half pressing shutter wakes up the meter the >camera takes that reading and applies the offset, as if it had an >aperture simulator. If you change aperture you have to re-index by >pressing the green button or use the difference between offset and >actual set aperture as an exposure adjustment. > >J. C. O'Connell wrote: > > > >>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
