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Manual ISO


3 years 6 months ago #697380 by Kris W
If you are shooting in manual mode, why are some setting manual ISO vs auto ISO?
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3 years 6 months ago #697381 by Nikon Shooter
When shooting in manual mode, Kris, you are taking critical
decisions and that is ok. At the same, time you want these
decisions to be taken quickly before the good shot is gone.
I shoot in manual mode all the time but I want my cameras
to behave as responsively as P&S.

For that reason, I take decisions on the smallest number of
parameters possible, read exposure (including aperture and
exposure compensation) and shutter speed. White balance
and ISO are both left on Auto thus reducing greatly the ma-
nipulations prior to shutter release.
Light is free… capturing it is not!
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3 years 6 months ago #697388 by Kris W
Yes, this is what I'm referring too.  Aperture is setting depth of field and shutter speed is setting is controlling the action.  ISO I get controls brightness, but so can adjustments on both aperture and shutter speed.


Am I right in my thinking here?
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3 years 6 months ago #697390 by Nikon Shooter
I teach my students to leave the ISO on auto,
understand and use exposure compensation.
Light is free… capturing it is not!
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3 years 6 months ago #697441 by Shadowfixer1
Most of the time people set ISO manually to control noise in an image. They don't want the camera to pick a higher ISO and create more noise in the image. The more cameras improve in controlling noise, the less need to set ISO manually. I am about 50/50 on manual vs. auto depending on conditions.  
www.betterphoto.com/?ramshots
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3 years 6 months ago #697447 by Ozzie_Traveller
G'day Kris

Perhaps if you are operating in a studio where the overall lighting is constant, then maybe a fixed ISO will work for you. Equally, maybe if you are a wedding photographer and using flash all the time, then by having a fixed ISO, you can also control the end results

However, for me - I am all over the place with venue + lighting + whatever results I am after, so I need to do things a bit differently. For me, both my cameras are set as "ISO on auto with 800 max"

This allows me to shoot away and set a speed and / or aperture as preference, along with any EV +/- for exposure variations and then allow the camera to balance the exposure with aperture (if I have set speed) or speed (if I have set aperture)

Whenever I see the exposure blinking in red in the EVF, I then need to re-evaluate my ISO for that scene and alter it accordingly. I have no big issues with ISO up to 3200, but overall prefer to keep it to 800 or below

Hope this helps
Phil from the great land Downunder
www.flickr.com/photos/ozzie_traveller/sets/
Phil from the great land Downunder
www.flickr.com/photos/ozzie_traveller/sets/
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