Auto Iso Settings?

BATMON · 08-01-2015, 10:10 AM

I usually shoot in TAV and keep the auto iso settings from 100 - 1600.

Should I just open it up from 100 - 51200?

Im using a K-50.

I recently moved it to 51200, and I was getting noisy photos when shooting a friend in warm light/nighttime/apt shots.

**MJSfoto1956** · 08-01-2015, 10:20 AM

I limit my K-3 to ISO 3200 which uses a more "modern" processor than the K-50.
I think ISO 1600 is the sweet spot, but you can always experiment -- keep in mind high ISO affect print SIZE more than anything.
As long as your print size is small (e.g. 4"x6") leveraging high ISO to keep the image sharp is a smart strategy.

As a reminder, "back in the day" ISO 400 was consider high speed!

Michael

BATMON · 08-01-2015, 10:28 AM

Cool.

Adam · 08-01-2015, 12:27 PM

Originally posted by BATMON

I usually shoot in TAV and keep the auto iso settings from 100 - 1600.

Should I just open it up from 100 - 51200?

Im using a K-50.

I recently moved it to 51200, and I was getting noisy photos when shooting a friend in warm light/nighttime/apt shots.

I wouldn't leave auto ISO higher higher than 3200, maybe 6400.

Adam
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swanlefitte · 08-01-2015, 07:13 PM

on my k-s2 I say in low light 3200 is pushing it. In bright light stopping down for dof I think, 6400 can work but those pics are still on the card unprocessed.

stevebrot · 08-02-2015, 12:53 PM

Originally posted by Adam

I wouldn't leave auto ISO higher higher than 3200, maybe 6400.

I concur. That being said, I have mine set to the range 100-6400, but seldom use auto-ISO. When I do so, it is usually for situations where I am willing to spend the time on noise reduction in PP.

Steve

przemomir · 08-10-2015, 08:31 AM

A noising is the matter of photographer, I think

. I did some tests - the same object (a few things in my kitchen) from tripod in ISO from 100 to max. In JPEG and RAW. The second test is a portrait of humen.So now, if I want use JPEG only, for things I use 100-6400 and to photo people - 100-800. Night shots of lights of city can be made even in higher ISO. When I want to work in LR with noise reduction, then I can use higher ISO too.
That is for K-3.

mcgregni · 08-10-2015, 12:24 PM

From a shooting 'priority' point of view, then auto -iso logically is for times when both aperture and shutter time value are a higher 'priority' than image quality. Tav is the priority mode to choose in those situations (time and aperture value as the priorities).

This would apply to scenes where you need to maintain a certain depth of field as well as capture specific motion effects.

Personally, I feel, that auto-iso should be avoided apart from those dual priority situations. In the name of extracting the best from our cameras it should be the aim to shoot at the lowest ISO compatible with steady handholding (dependent on focal length mostly).

I don't think it really should be used as an easy way of getting automatic exposures, or at least not with a wide auto-iso range. I suppose really, the range should be adjusted specifically for each time you need it, not set as some kind of generic camera default

Fogel70 · 08-11-2015, 01:16 AM

Originally posted by BATMON

I usually shoot in TAV and keep the auto iso settings from 100 - 1600.

Should I just open it up from 100 - 51200?

Im using a K-50.

I recently moved it to 51200, and I was getting noisy photos when shooting a friend in warm light/nighttime/apt shots.

In TAv mode it should be safe to use whole ISO range, as ISO will depend on what you manually set shutter speed and aperture to.
If the camera choose higher ISO then than you prefer, you need to use slower shutter speed or larger aperture. If you cannot, then there are simply to little light available to use lower ISO. Limiting the ISO range in TAv will only add risk of underexposure.

If using semi-automatic modes you might want to limit ISO range as you do not have full control over shutter speed and aperture, but you can also try setting "auto ISO parameters" to slow, so the camera FI will use slower shutter speed before it start to raise the ISO (in Av mode).

Bagga_Txips · 08-11-2015, 03:38 AM

Nowadays we often view our shots on large monitors, or even on big TV screens. I think we should implement a new rule - if you think the shot is a bit noisy, don't lean forwards to check the noise, lean backwards and look at the image!

08-01-2015, 10:10 AM	#1
BATMON Senior Member Join Date: Aug 2013 Posts: 207	Auto Iso Settings? I usually shoot in TAV and keep the auto iso settings from 100 - 1600. Should I just open it up from 100 - 51200? Im using a K-50. I recently moved it to 51200, and I was getting noisy photos when shooting a friend in warm light/nighttime/apt shots.

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08-01-2015, 10:20 AM	#2
MJSfoto1956 Site Supporter Join Date: Dec 2013 Location: Boston Posts: 1,305	I limit my K-3 to ISO 3200 which uses a more "modern" processor than the K-50. I think ISO 1600 is the sweet spot, but you can always experiment -- keep in mind high ISO affect print SIZE more than anything. As long as your print size is small (e.g. 4"x6") leveraging high ISO to keep the image sharp is a smart strategy. As a reminder, "back in the day" ISO 400 was consider high speed! Michael

08-01-2015, 10:28 AM	#3
BATMON Senior Member Join Date: Aug 2013 Posts: 207 Original Poster	Cool.

08-01-2015, 12:27 PM	#4
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Originally posted by BATMON I usually shoot in TAV and keep the auto iso settings from 100 - 1600. Should I just open it up from 100 - 51200? Im using a K-50. I recently moved it to 51200, and I was getting noisy photos when shooting a friend in warm light/nighttime/apt shots. I wouldn't leave auto ISO higher higher than 3200, maybe 6400. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

08-01-2015, 07:13 PM	#5
swanlefitte Pentaxian Join Date: May 2015 Location: Minneapolis Photos: Gallery Posts: 4,068	on my k-s2 I say in low light 3200 is pushing it. In bright light stopping down for dof I think, 6400 can work but those pics are still on the card unprocessed.

08-02-2015, 12:53 PM	#6
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by Adam I wouldn't leave auto ISO higher higher than 3200, maybe 6400. I concur. That being said, I have mine set to the range 100-6400, but seldom use auto-ISO. When I do so, it is usually for situations where I am willing to spend the time on noise reduction in PP. Steve

08-10-2015, 08:31 AM	#7
przemomir Guest	A noising is the matter of photographer, I think . I did some tests - the same object (a few things in my kitchen) from tripod in ISO from 100 to max. In JPEG and RAW. The second test is a portrait of humen.So now, if I want use JPEG only, for things I use 100-6400 and to photo people - 100-800. Night shots of lights of city can be made even in higher ISO. When I want to work in LR with noise reduction, then I can use higher ISO too. That is for K-3.

08-10-2015, 12:24 PM	#8
mcgregni Veteran Member Join Date: Sep 2012 Location: Surrey, England Posts: 2,603	From a shooting 'priority' point of view, then auto -iso logically is for times when both aperture and shutter time value are a higher 'priority' than image quality. Tav is the priority mode to choose in those situations (time and aperture value as the priorities). This would apply to scenes where you need to maintain a certain depth of field as well as capture specific motion effects. Personally, I feel, that auto-iso should be avoided apart from those dual priority situations. In the name of extracting the best from our cameras it should be the aim to shoot at the lowest ISO compatible with steady handholding (dependent on focal length mostly). I don't think it really should be used as an easy way of getting automatic exposures, or at least not with a wide auto-iso range. I suppose really, the range should be adjusted specifically for each time you need it, not set as some kind of generic camera default

08-11-2015, 01:16 AM	#9
Fogel70 Pentaxian Join Date: Sep 2009 Location: Stockholm, Sweden Photos: Albums Posts: 3,062	Originally posted by BATMON I usually shoot in TAV and keep the auto iso settings from 100 - 1600. Should I just open it up from 100 - 51200? Im using a K-50. I recently moved it to 51200, and I was getting noisy photos when shooting a friend in warm light/nighttime/apt shots. In TAv mode it should be safe to use whole ISO range, as ISO will depend on what you manually set shutter speed and aperture to. If the camera choose higher ISO then than you prefer, you need to use slower shutter speed or larger aperture. If you cannot, then there are simply to little light available to use lower ISO. Limiting the ISO range in TAv will only add risk of underexposure. If using semi-automatic modes you might want to limit ISO range as you do not have full control over shutter speed and aperture, but you can also try setting "auto ISO parameters" to slow, so the camera FI will use slower shutter speed before it start to raise the ISO (in Av mode).

08-11-2015, 03:38 AM	#10
Bagga_Txips Veteran Member Join Date: Nov 2011 Location: Waterford Photos: Gallery \| Albums Posts: 454	Nowadays we often view our shots on large monitors, or even on big TV screens. I think we should implement a new rule - if you think the shot is a bit noisy, don't lean forwards to check the noise, lean backwards and look at the image!