How would the camera know the current set aperture of the lens? Gonz wrote:
>You still have to put in the focal length for SR, the aperture simulator >is not going to help you there. In fact, you could make the firmware >remember your lens history and let you select from that for much quicker >setup when you power on. > >With the new bodies, you cannot do multi-segment metering with the old >lenses, the aperture simulator is not going help you there either. > >Plus, knowing the characteristics of the lens can help you do things in >the firmware the the aperture simulator couldnt possibly do, like do >distortion correction in the firmware, or vignetting compensation, etc. > >It may be seem to be messy, but you do it ONCE per lens (or you could >skip it because it would come with default tables) and your done. After >that, you simply dial in the lens you are using and you get max >functionality. > >And to answer your more direct question why: because it would be >redundant, the tables would provide the equivalent function. > >[EMAIL PROTECTED] wrote: > > >>But why, your autocalibration for each lens is >>Not as smooth an integration as the simple >>Cam sensor would be. There is no need to >>do it from the body. The user would also have >>to input the absolute maximum apeture too. Its >>messy compared to simple lens cam sensor >>and mounting ANY K/M lens you please without >>having to change any settings or run calibrations. >>jco >> >>-----Original Message----- >>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of >>Gonz >>Sent: Saturday, October 14, 2006 12:39 AM >>To: Pentax-Discuss Mail List >>Subject: Re: K1D aperature simulator survey, part Deaux >> >>My point is not that Pentax would do it, my point is that it could be >>done. That way they could do away with the simulator if they wanted to >>continue moving forward with the concept of controlling the lens from >>the body. >> >>[EMAIL PROTECTED] wrote: >> >> >> >>>Yes each lens could be autocalibrated but I doubt >>>Pentax would be willing to go that far if they >>>Wont even provide something as simple and cheap >>>As the cam sensor which would eliminate the need >>>For any calibration with any K/M lenses. That's how >>>The were designed to be used anyway. >>>jco >>> >>>-----Original Message----- >>>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf >>> >>> >>Of >> >> >> >>>Gonz >>>Sent: Friday, October 13, 2006 11:59 PM >>>To: Pentax-Discuss Mail List >>>Subject: Re: K1D aperature simulator survey, part Deaux >>> >>>I bet you'll find that due to mass production, the sample variation is >>> >>> >> >> >>>not significant. Even though the "A" lenses might be calibrated that >>>way, its still the same basic concept. I've found that while using >>> >>> >>the >> >> >> >>>aperture ring is more accurate even for "A" lenses, its not off by >>> >>> >>that >> >> >> >>>much, maybe 1/3 stop on worst case. Its probably similar to the K/M >>>lenses. Besides you could autocalibrate your lens and write the table >>> >>> >> >> >>>back into the firmware. Problem solved. >>> >>> >>>[EMAIL PROTECTED] wrote: >>> >>> >>> >>> >>>>What I said is they are not all the SAME >>>>Non linearity. Not enough consistancy >>>>>From sample to sample and lens model to lens >>>>Model to allow it. Non linearity isnt the >>>>Problem, non consistancy is because they >>>>Were all designed to use "digitally" (fully >>>>Closed or fully open with regard to the aperture >>>>Actuator). >>>>jco >>>> >>>>-----Original Message----- >>>>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf >>>> >>>> >>>Of >>> >>> >>> >>> >>>>Gonz >>>>Sent: Friday, October 13, 2006 8:24 PM >>>>To: Pentax-Discuss Mail List >>>>Subject: Re: K1D aperature simulator survey, part Deaux >>>> >>>>"A" lenses are no different, except that the actuator is linear. If >>>> >>>> >>>you >>> >>> >>> >>> >>>>put your M or K lense on f22 and move the actuator, it acts the same >>>>way. Since they have to at least work with the mechanical stop based >>>>method, this means that they are machined to at least this accuracy. >>>> >>>> >>>So >>> >>> >>> >>> >>>>it should work, I disagree with you. >>>> >>>> >>>>[EMAIL PROTECTED] wrote: >>>> >>>> >>>> >>>> >>>> >>>>>I don't think this is possible because K/M >>>>>Lenses were not designed for partial closure >>>>>Of the aperture and do not have consistant >>>>>Non linear closure from sample to sample. It >>>>>Was a simple OPEN/CLOSE/OPEN design. >>>>>jco >>>>> >>>>>-----Original Message----- >>>>>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf >>>>> >>>>> >>>>Of >>>> >>>> >>>> >>>> >>>> >>>>>Gonz >>>>>Sent: Friday, October 13, 2006 4:47 PM >>>>>To: Pentax-Discuss Mail List >>>>>Subject: Re: K1D aperature simulator survey, part Deaux >>>>> >>>>>The firmware on the Samsungs is definitely different, see the pics >>>>>floating around for the K10D samsung equivalent. The UI is >>>>> >>>>> >>distinctly >> >> >> >>>>>different. >>>>> >>>>>If the firmware is different, then they could actually implement the >>>>>whole aperture simulator thing in firmware if I understand correctly >>>>> >>>>> >>>>how >>>> >>>> >>>> >>>> >>>> >>>>>its supposed to work. The way you could do it is by inputing the lens >>>>> >>>>> >> >> >>>>>being used, say K50 1.4 into the body UI when you powered up the >>>>> >>>>> >>>>camera. >>>> >>>> >>>> >>>> >>>> >>>>>All they would need would be the actual non-linear response of the >>>>>aperture linkage (which would be in a table in the firmware) and they >>>>> >>>>> >> >> >>>>>could close down the aperture to the correct position as dialed in by >>>>> >>>>> >> >> >>>>>the user on the body. The user would have to set the lens to f22 or >>>>>whatever the min on the lens is, effectively mimicing the "A" >>>>> >>>>> >>setting. >> >> >> >>>>>Knowing exactly what lens is mounted would be used not only for the >>>>>aperture response, but the focal length for SR, the wide open >>>>> >>>>> >>>>aperture, >>>> >>>> >>>> >>>> >>>> >>>>>and possibly even used for multi-segment metering. >>>>> >>>>>[EMAIL PROTECTED] wrote: >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>>>Umm.... Hello! It's another moot question! Samsung bodies are, >>>>>> >>>>>> >>and >> >> >> >>>>>>will always be, re-named Pentax bodies. They will not produce a >>>>>> >>>>>> >>>>>unique >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>>>k-mount body. Stop with the surveys and get a grip. >>>>>> >>>>>> >>>>>> >>>>> >>>>> > > > -- 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
