Confused about ISO

J

John.D

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John
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Recently with my photography i've been shooting at 100ISO, hearing it will give the crispest results. I know you are meant to increase the ISO depending on the lighting conditions, but i'm surprised while browsing submissions on Deviantart, how many portrait shots for example are shot in high ISOs, 800 for instance. Is there any other advantage to shooting with a higher ISO? The shots i'm talking about look like the typical studio lighting conditions, not anything like shot during the night time :lol: I can't see why they couldn't be shoot at a lower ISO...
 
The only real reason I can see for shooting in the studio at such a high ISO is that the lights weren't powerful enough to allow the DoF required.

If you need, for example, f11 to get the look you want then lots of the lower power units simply don't have the power to stay in the "high quality" zone. Luckily, lots of the newer cameras still look great at 800 and above.
 
Shooting at higher ISO increases noise. Maybe they want to get a grittier look with higher ISO, although many camera manufacturers try like mad to keep noise down.

As already stated it may have something to do with the light that's available or other variables such as long lens being used. It's difficult to comment without knowing the exact circumstances
 
I shot with a D3 and at 800 its just getting started,there is virtually no noise.
Even at 3200 its not really noisy just grainy in my opinion
 
As said, increasing the iso is a way to get a faster shot. Allowing smaller aperture and/or shorter exposure times. Some people may also want the extra noise/grain.

We would need to see some of the shots to give a good reason. Of course people may have left iso on auto....

Perhaps they are handheld in low light?
 
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