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07-21-2021, 08:55 AM   #1
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k1 ii - minimum shutter speed in AV mode?

Hello all,
I'm shooting an outdoor wedding in a couple of weeks, I don't do many weddings so a little (a lot) nervous. I normally shoot manual but thought shooting in AV mode would be better for getting quick moments without needing to stop to manage the settings if the clouds change.

However, I don't want the shutter speed to slow down too much so I can avoid unwanted blur. Is it possible to fix a minimum shutter speed? I've had a few good looks through the menus and google so don't think so but I thought someone here would know or have advice.

Thanks in advance.
Julie

07-21-2021, 08:58 AM - 1 Like   #2
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What about Tav mode? Letting iso float a little. Iím sorry I donít have a k-1 to verify options.

Last edited by UncleVanya; 07-21-2021 at 09:11 AM.
07-21-2021, 09:12 AM   #3
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QuoteOriginally posted by UncleVanya Quote
What about Tav mode? Letting iso float a little.
Thank you, I must admit rarely using Tav but will practise.
07-21-2021, 09:24 AM - 1 Like   #4
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Start with TAv mode, 1/100s, f2.8 and adjust accordingly on the fly.
Important: Weddings are tricky for many factors including some things that happen very fast and can not be repeated. So be ready to draw and shoot fast.

Thanks

07-21-2021, 09:44 AM - 1 Like   #5
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QuoteOriginally posted by Julie Whelan Quote
Thank you, I must admit rarely using Tav but will practise.
If you shoot in raw and limit iso to something reasonable you should be able to adjust to nearly any situation quickly. The alternative is program mode where when you spin the aperture dial the shutter automatically adjusts and vice versa. The exposure compensation adjustment is your friend in this mode but it isnít as fast at reacting as Tav if you normally shoot in manual. Itís faster if the camera generally gets exposures right.
07-21-2021, 10:16 AM - 1 Like   #6
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The K1ii doesn't have this option, so I use Av with a higher minimum ISO (say 400 in bright daylight), and more rarely TAv as suggested above (just a matter of personal preference). Btw for comparison's sake, GR III does have this option, and it's handy but not crucially more useful than a min ISO, I still end up with a user mode to quickly get to this mode of operation.
07-21-2021, 12:06 PM - 1 Like   #7
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You can also do just Tv, shutter priority mode, it will set you aperture to best possible setting at that speed, and keep ISO in the range you specify.

07-21-2021, 12:27 PM - 1 Like   #8
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QuoteOriginally posted by aaacb Quote
The K1ii doesn't have this option, so I use Av with a higher minimum ISO (say 400 in bright daylight), and more rarely TAv as suggested above (just a matter of personal preference). Btw for comparison's sake, GR III does have this option, and it's handy but not crucially more useful than a min ISO, I still end up with a user mode to quickly get to this mode of operation.
Which option? I believe it has Sv, Tv, Av, and TAv priority options, as well as program mode which can be switched to shutter or aperture priority with the flip of a front or rear finger dial.

Last edited by Bob 256; 07-21-2021 at 12:34 PM.
07-21-2021, 12:34 PM - 1 Like   #9
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It is a little strange that KP have the option of (manual setting) minimum shutter speed for auto ISO, but not K1 II released after KP.

Last edited by Fogel70; 07-21-2021 at 12:42 PM.
07-21-2021, 12:48 PM - 2 Likes   #10
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QuoteOriginally posted by Julie Whelan Quote
Hello all,
I'm shooting an outdoor wedding in a couple of weeks, I don't do many weddings so a little (a lot) nervous. I normally shoot manual but thought shooting in AV mode would be better for getting quick moments without needing to stop to manage the settings if the clouds change.

However, I don't want the shutter speed to slow down too much so I can avoid unwanted blur. Is it possible to fix a minimum shutter speed? I've had a few good looks through the menus and google so don't think so but I thought someone here would know or have advice.

Thanks in advance.
Julie
Assuming the K-1II behaves like other Pentax DSLRs (I have a KP) and that you want to use Av Mode, then set the ISO to Auto - lower limit 100 and upper limit as high as you are prepared to go to maintain quality (perhaps 3200 on K-1?). The camera will then not allow the shutter speed to fall below the old rule of thumb of 1/focal length, unless the light is so low that the chosen upper ISO limit is not high enough.

Philip
07-21-2021, 01:12 PM - 1 Like   #11
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QuoteOriginally posted by Bob 256 Quote
Which option? I believe it has Sv, Tv, Av, and TAv priority options
I meant that the GR III allows to set a minimum shutter speed. The way you do it is independent from the modes, it's in the ISO menu, where in addition to low and high limits you also get a min shutter speed. Default is 1/30 I believe, for landscapes I set 1/4" and for street 1/500. If ISO/aperture don't allow for correct exposure, it'll still go below the limit, it doesn't seem to be a hard limit.
07-21-2021, 05:17 PM - 1 Like   #12
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Maybe it is possible to set up a USER preset. In it you could use a shutter priority mode and set the shutter speed to your desired speed, maybe run with auto iso too? In it you could also specify spot metering or whatever you desire
07-21-2021, 05:24 PM - 1 Like   #13
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Sounds like hyperprogram (P with dials) mode would do what you need. You can change everything on the fly without being locked into a mode.
07-23-2021, 05:21 AM - 1 Like   #14
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Using TAv mode is a possibility.

Another way is to set a minimum ISO value for the auto ISO, given average light of the day or situation (cloudy, sunny, indoors, outdoors), which indirectly is equivalent to setting a minimum shutter speed. Setting the max allowed ISO setting for auto-ISO will avoid unnecessary high shutter speed for optimal image quality.
4 Days Ago - 1 Like   #15
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Technically you will get the best possible results with M at fixed ISO 100 and your preferred Aperture and minimum shutter speeds (= longest tolerable exposure time like 1/125 sec or so) dialed in.
That will yield lots of underexposed images, but since you can fix these raws in post without any significant penalty versus choosing higher ISO initially due to the K-1's ISOless sensor. This yields the biggest possible max dynamic range for all images (because ISO 100).

Caveat:

This will not protect against overexposures, so if you use a very fast lens and shoot outdoors then probably you will need to manually choose even shorter shutter times.
No different from using TAv, though.


If you feel uncomfortable with shooting a wedding already this probably is an approach out of your comfort zone.

The setting max exposure time is only available in cameras from KP onwards I think.
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