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01-17-2009, 10:49 AM   #16
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QuoteOriginally posted by qksilver Quote
this is the k20d program mode glitch. all k20d's do it. hopefully it will be fixed with the next firmware update
Are you saying what I described above is a "known bug"? Just looking for clarification on what your reply is in reference to.

01-20-2009, 04:34 PM   #17
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Yes it's a known bug.

See this thread
01-20-2009, 04:39 PM   #18
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I had an email from Dorian (who frequents this forum) on 04/04/2008 saying Pentax would look into it. They didn't fix it in their latest firmware.
01-20-2009, 07:39 PM   #19
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Hey, guys, try TAv mode. You set the shutter speed and aperture, the camera adjusts the ISO to the meter. That's what it is there for.

01-20-2009, 07:50 PM   #20
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I use TAv a lot. But when I got the K20D I put it in its much vaunted Hyper-P mode wanting the quick change to Av or Tv mode via the dials. However it doesn't do what it should do and I would have thought Pentax would fix this blatant and rather large error. I still want to be able to do this.
01-20-2009, 10:24 PM   #21
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Thanks for the heads up, Arpe. It had me scratching my head for sure. It certainly would be a handy mode if it worked but I'm not going to lose sleep over it.
01-21-2009, 10:11 AM   #22
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QuoteOriginally posted by Arpe Quote
I use TAv a lot. But when I got the K20D I put it in its much vaunted Hyper-P mode wanting the quick change to Av or Tv mode via the dials. However it doesn't do what it should do and I would have thought Pentax would fix this blatant and rather large error. I still want to be able to do this.
Arpe, are you saying that the P mode shifts properly when you change an e-dial, but then won't change the ISO when it runs out of f/stop room or shutter speeds? If so, I missed the whole topic.
01-21-2009, 12:37 PM   #23
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That is precisely the problem/issue/yadda, Albert. I elaborated a bit in my 2nd post...

QuoteQuote:
What I am expecting the camera to do in P mode is mimic the behavior of Tv mode when I am moving the Tv e-dial and mimic Av mode when moving the Av e-dial. It doesn't.
Take this example of a base exp. of 1/60s, f/4, ISO 100 and increase shutter to 1/90 and then 1/125. Aperture changes to f/3.5 and f/2.8 respectively. The ISO will not increase from 100 however, and so the shutter can not increase past 1/125s. Now if I change the aperture back to f/4 the ISO will now increase to 200 and the shutter stays on 1/125. I can continue to push the ISO by stopping down the aperture until the ISO maxes out and the shutter will not budge off of 1/125. And if I try increasing the shutter dial again it runs home to mama and I'm back to 1/60, f/4, ISO 100.
And, If I start with an exposure with ISO mid-range and decrease shutter, once aperture hits 2.8 it will decrease ISO down to 100 (yay!). But it will not then let me increase shutter again (boo!).
Easy to replicate: Put the camera into P mode and auto-ISO, focus and hit the green button to get a "correct" exposure (best demonstrated if the f-stop begins stopped down one or two stops). Now start increasing shutter speed. The aperture will stop down until it maxes out. Another click of the Tv dial *should* now start increasing ISO, but it won't. Your ISO will however increase/decrease if the light changes in the framed image or you move the camera around thus changing the light.

01-21-2009, 01:59 PM   #24
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Now that I understand the question (it takes a while) I took my trusty k10d with firmware 1.30 on it. It has exactly the same problem. In P, to change the ISO upward, I need to use the aperture wheel. It goes down just fine, but won't go up using the shutter e-dial. Interesting! This bug is there from the k10, at least.
01-21-2009, 02:32 PM   #25
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helps if I type right too ... "The aperture will stop down until it maxes out" should be "The aperture will open up until it maxes out".

I never really noticed the behavior until the other night when I decided I should check out P mode to see what it was all about. I'd only set it there maybe once or twice when I first got my K10D last March
01-21-2009, 04:42 PM   #26
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The Hyper-P mode was one reason I upgraded to K20D (amongst others of course). But now I never use it because of this programming failure.
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