Ok. JCO -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bob W Sent: Tuesday, October 17, 2006 5:54 PM To: 'Pentax-Discuss Mail List' Subject: RE: K1D aperature simulator survey, part Deaux
because it's an email to a friendly group of like-minded people, not a legal deposition, so sloppiness of language is occasionally forgiven? -- Cheers, Bob > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of J. C. O'Connell > Sent: 17 October 2006 22:20 > To: 'Pentax-Discuss Mail List' > Subject: RE: K1D aperature simulator survey, part Deaux > > I guess the terms are unclear, by saying "instant" it seems > To imply compensation for the new aperture setting rather > Than bracketing or metering compensation. Why use "instant" > In that context? > jco > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of > Bob W > Sent: Tuesday, October 17, 2006 3:06 PM > To: 'Pentax-Discuss Mail List' > Subject: RE: K1D aperature simulator survey, part Deaux > > That's why it's exposure compensation, and not a changed exposure. If > you take the original reading at 5.6 then change the aperture to 2.8 > without Gbing again, and without the light changing, you will > overexpose (or compensate) by 2 stops, which is what Peter wrote. > > However, if you take the original reading and the light changes before > you take the picture, the camera can take the changed light into > account and vary the shutter speed or iso when you make the exposure > because it knows the difference between the original wide-open > reading, the immediate pre-exposure reading, and the original > stopped-down reading. > > -- > Cheers, > Bob > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > > Behalf Of J. C. O'Connell > > Sent: 17 October 2006 19:25 > > To: 'Pentax-Discuss Mail List' > > Subject: RE: K1D aperature simulator survey, part Deaux > > > > 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 > > > > > > -- > > 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 > > > -- > 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 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
