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10-15-2019, 05:25 PM   #1
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Auto ISO in M ?

I thought i saw an option for Auto ISO in Manual Mode mentioned somewhere but can't seem to find a way to enable it.

10-15-2019, 05:29 PM   #2
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Well, TAv does that, right, DT?
10-15-2019, 05:35 PM   #3
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QuoteOriginally posted by DeepThrob Quote
I thought i saw an option for Auto ISO in Manual Mode mentioned somewhere but can't seem to find a way to enable it.
I don't think this has been supported on any Pentax camera since before I bought my K10D in 2006. Auto ISO for M modes is disabled on flagship models and defaults over silently to TAv mode on other models.


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10-15-2019, 05:49 PM   #4
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In case you're asking about manual lenses ("K" or "M") you can have auto-ISO, but the camera will only shoot wide open (in all modes: M, TAv, P, etc). The green button does nothing. With manual ISO, the green button performs a stop-down metering, and the lens will stop down during the exposurer to whatever you have set on the aperture ring. Just tried it with my K-50 and K 50.

10-15-2019, 06:06 PM   #5
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In TAV mode you set shutter speed and aperture and the camera chooses ISO. Is that what you mean?
10-15-2019, 06:12 PM - 1 Like   #6
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QuoteOriginally posted by DeepThrob Quote
I thought i saw an option for Auto ISO in Manual Mode mentioned somewhere but can't seem to find a way to enable it.
Yup, just switch to TAv on the mode dial. On certain cameras like the K-01, TAv is baked into M mode, but is effectively the same thing.
10-15-2019, 07:27 PM   #7
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QuoteOriginally posted by clackers Quote
Well, TAv does that, right, DT?
Well yes, it does. Never used TAv , had to look it up. (Only Pentax has TAv)

What Is TAV Mode And Why Is It Useful? | ePHOTOzine
10-15-2019, 07:33 PM   #8
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QuoteOriginally posted by DeepThrob Quote
Well yes, it does. Never used TAv , had to look it up. (Only Pentax has TAv)

What Is TAV Mode And Why Is It Useful? | ePHOTOzine
My camera practically lives in TAv mode.

10-15-2019, 07:55 PM - 1 Like   #9
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QuoteOriginally posted by MarkJerling Quote
My camera practically lives in TAv mode.
Seems likely it will be optimal (mostly) for me too.
10-15-2019, 08:37 PM   #10
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QuoteOriginally posted by Adam Quote
Yup, just switch to TAv on the mode dial. On certain cameras like the K-01, TAv is baked into M mode, but is effectively the same thing.
Yup, that is how I fequently use my K-01. Too bad exposure compensation is not available, though.
10-16-2019, 01:22 AM   #11
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Indeed, no auto ISO in M mode, but TAv works like a charm (on my K-50 at least)
10-25-2019, 07:39 PM   #12
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No auto ISO in M mode on my K-5 either, but TAv mode works great! You just have to remember to set the Range of Automatic Sensitivity Correction first to ensure the camera has enough leeway to make the ISO adjustment to match your shutter speed and aperture settings.
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