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04-02-2015, 12:14 PM   #16
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QuoteOriginally posted by jamarley Quote
Steve, this makes perfect sense. But it begs the question how does this get fouled up in the first place?

Jeff
Sorry, you lost me there. What is fouled up?


Steve

04-03-2015, 07:05 AM   #17
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QuoteOriginally posted by stevebrot Quote
Sorry, you lost me there. What is fouled up?
Well, if Auto ISO is working as I expected, what changes it that requires me to use the green button? Is it simply a matter of manually adjusting it that plays around with the setting?
04-03-2015, 07:42 AM   #18
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QuoteOriginally posted by jamarley Quote
Well, if Auto ISO is working as I expected
You still lost me. I don't know that your expectations. The original post asked if auto-ISO is available in Av and Tv mode on the K-3. The answer is yes. The behavior goes like this:
  • ISO button + green button --> auto-ISO "ON"
  • Auto-ISO will stay on for all switchable modes* until turned off
  • ISO button + rear e-dial --> manually set ISO (auto-ISO --> "OFF"). If manually set (changed), then it is not on auto anymore.
  • Auto-ISO is always on for TAv and "green" modes
  • Auto-ISO is never enabled for Sv, M, B, or X modes
  • For modes where auto-ISO is never enabled, the last set ISO is used
  • Changing ISO in Sv mode does not toggle auto-ISO off**
It is the second bullet point that might cause some confusion. If you are using auto-ISO in Av mode, switch to M mode, change the ISO, and switch back you will no longer be using auto-ISO. Auto-ISO state is not "pinned" to a particular mode. The work-around is to create a user custom mode (U1, U2, or U3) where auto-ISO is turned on.


Steve

* The modes that are switchable are: P, Av, and Tv
** Don't ask me why this is. I have no idea.

Last edited by stevebrot; 04-03-2015 at 07:59 AM.
04-03-2015, 07:53 AM   #19
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QuoteOriginally posted by stevebrot Quote
The behavior goes like this:
I would add that most of what I documented above is based on trial and error. The auto-ISO feature is poorly documented on the K-3.


Steve

04-03-2015, 08:33 AM   #20
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QuoteOriginally posted by stevebrot Quote
I would add that most of what I documented above is based on trial and error. The auto-ISO feature is poorly documented on the K-3.


Steve
Over the years I've discovered the same thing. I don't think the K3 has really changed these behaviors vs the K5 (at least for the most part).

I personally don't mind too much (partially because I rarely use auto-iso) because usually when I am out and about, if I change modes I want as much of the previous mode as possible to "stick". For instance, I'm often shifting between M, Av, and TAv. Besides the obvious variables and auto-exposure items in each mode (or lack of in M mode), I like setting for instance an aperture and being able to switch to one of the other modes and having the aperture be the same.

Usually, I'm changing modes because I want extra control over the parameter I'm using. I tend to favor aperture, so if I switch to M or TAv, I want the aperture to stick. If I am fixing ISO, I would like that same ISO to persist as I move to other modes (with the obvious caveat that I wouldn't expect that for TAv).

In fact, the one thing I'm not a fan of in user modes is that there does not seem to be an easy way to create a similar type of behavior. I've always wanted to create a user mode that is essentially the same as Av mode with bracketing turned on. The problem is that user modes tend to save a specific aperture or ISO setting, whereas I'd like it to inherit those settings from the settings in a previous mode as occurs with ISO, etc. when switching between other modes. I'm not sure that isn't possible, but I've never figured it out either.
04-03-2015, 10:47 AM   #21
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Thanks Steve & Erik for attempting to clear my brain fog. I normally use either P or TAV modes with AF lenses. I think what confused me in P mode is after having set up the ISO range, I expected the camera to default to that, while presuming that dialing in a manual ISO was not also turning Auto ISO off in order to do so. I normally don't have a problem understanding how computer logic works and digital cameras are basically just an interface between a computer (microchip) and a lens/sensor system.

Jeff
04-04-2015, 01:17 AM   #22
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QuoteOriginally posted by stevebrot Quote
You still lost me. I don't know that your expectations. The original post asked if auto-ISO is available in Av and Tv mode on the K-3. The answer is yes. The behavior goes like this:
  • ISO button + green button --> auto-ISO "ON"
  • Auto-ISO will stay on for all switchable modes* until turned off
  • ISO button + rear e-dial --> manually set ISO (auto-ISO --> "OFF"). If manually set (changed), then it is not on auto anymore.
  • Auto-ISO is always on for TAv and "green" modes
  • Auto-ISO is never enabled for Sv, M, B, or X modes
  • For modes where auto-ISO is never enabled, the last set ISO is used
  • Changing ISO in Sv mode does not toggle auto-ISO off**
It is the second bullet point that might cause some confusion. If you are using auto-ISO in Av mode, switch to M mode, change the ISO, and switch back you will no longer be using auto-ISO. Auto-ISO state is not "pinned" to a particular mode. The work-around is to create a user custom mode (U1, U2, or U3) where auto-ISO is turned on.


Steve

* The modes that are switchable are: P, Av, and Tv
** Don't ask me why this is. I have no idea.

Too many answers :-) but thanks Steve again for my basic ask which was how to set the auto iso in Av and Tv mode. I have the czech manual and it's not explained well. Thanks.
04-04-2015, 02:38 AM   #23
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QuoteOriginally posted by stevebrot Quote
I don't believe that is possible. I have my K-3 in hand (firmware v1.11) and it will not switch to auto-iso when in M mode. In my opinion, that is one of the strong points of the camera.* If you are able to do otherwise, please provide step-by-step instructions. I may have an empty space in experience with the K-3.


Steve

* I am not a fan of Auto-ISO...too many troubleshooting requests on this site where it was the underlying cause of user confusion...
+1 M mode is full manual in k-3..

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