See my last post. This is simple. the istD doesn't do the SAME AE the cameras for 30 years have been providing. If you want to call what the istD does AE fine, then K/M lenses do SUPER-AE and that what I am arguing needs to be supported. the names are meaningless to me. And while I didn't say it I KNOW what the green button does, yes it sets the shutter speed for you when you take a reading but it doesn't set the shutter speed for you ALL THE TIME WITHOUT NEEDING TO TAKE A READING. that's the AE K/M does and should be contined to be provided. You argued yourself already that automation is good needed function-option, well K/M AE automation is MORE automated than green button MUCH MORE.
-----Original Message----- From: William Robb [mailto:[EMAIL PROTECTED] Sent: Thursday, September 22, 2005 12:52 PM To: [email protected] Subject: Re: Camera engineering (This is signifigant) ----- Original Message ----- From: "J. C. O'Connell" Subject: RE: Camera engineering (This is signifigant) > =============================================================== > WILLIAM ROBB WRITES in post quote BELOW: > > "I need to point out that AE is still available with K/M lenses on > Pentax digital cameras" > ============================================================== > NO ITS NOT. Green button thing is not AE by any stanards > of today or yesterday. Its metered manual. You have > to MANUALLY take a new meter reading every time you change the > aperture setting which you don't have to do with AE and the camera > does not continously AUTOMATICALLY > adjust exposure for changes in subject or lighting either. > That what AE is. Continous AUTOMATIC exposure without > ANY need for operator intervention. When the operator > has to take new reading manually every time any of > these factors change its metered manual mode. > WHAT PART OF THIS DON'T YOU UNDERSTAND? I guess I don't understand the part where I'm right, you are wrong, and you are too stubborn to admit it. It's the reason for why I keep replying. Since you have never used a DSLR, Pentax or otherwise, let me explain what apertue preferred automatic is, and how it is enabled on the istD (the others I am not sure about, I haven't used them). Aperture preferred automatic refers to an exposure function whereby the camera operator sets the aperture, and the camera sets the shutter speed based on a light meter reading. On the istD, this is done thusly: Set the aperture to the desired value. Press the green button. The aperture momentarily stops down to the selected aperture, and the camera sets the shutter speed, all by it's little self, with no input from the operator. Certainly not as seamless as on the fly AE, but since the camera is setting the shutter speed itself, it is *not* manual exposure control by any definition, other than your wrong one. > > So your entire premise below is false because > you have overlooked the key MAJOR difference between metered manual > and AE and you are mistakenly calling metered manual AE when it isnt. > K/M lenses can and have been providing true AE for 30 years, the green > button thing is like the old super-takumars of the 1960's. Stop down > metered manual. Not the same level of automation at all, and not > even close. See above for explanation. I've used stop down metered manual on old Spotmatics, and it is not the same as the aperture preferred AE as implemented by the istD, which, if you had ever used a Pentax DSLR, you would realize, rather than continuing to argue out of ignorance. John, I'm going to admit that you just don't get it , probably never will, and bow out now. Arguing with the ignorant is a fools game that I tire of quickly, and I tired of this conversation yesterday afternoon. William Robb
