Iso? - Coin Community Forum

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Author	Replies: 4 / Views: 1,639
John1 Moderator United States 56855 Posts	Posted 04/28/2015 08:43 am I have a point-n-shoot camera and would like to know what ISO is best? Thanks, John1 Report this Post to the Staff

SsuperDdave Moderator United States 23522 Posts	Posted 04/28/2015 09:16 am Keep that number as low as you can possibly force it. Higher ISO numbers are the digital equivalent of "faster" film, so they allow more light in (something we like) but at the cost of greater noise levels. In a P&S type camera this effect is more exaggerated than on the much larger sensors of dSLR's. I doubt you'd be at all happy with the noise at ISO400, which I use regularly with my dSLR. Even if it means using more light, try to keep it no higher than ISO100, but you may end up with "blowouts" so experimentation is in order. Report this Post to the Staff
JimmyJames Valued Member United States 211 Posts	Posted 04/28/2015 09:40 am You can do a little experiment with your camera by taking the same photo a couple times in the same light with different ISOs. I can't tell the difference between 100 and 800 on my camera, but once I start going above 800 there is a detectable increase in noise (noise = grainy). Going up to 1600 would be fine for me, but I keep it down at 100 or 200 because I can. Report this Post to the Staff
John1 Moderator United States 56855 Posts	Posted 04/28/2015 12:54 pm Mine goes down to 80,I will try it there. Does the f stop matter? It's at 2.8 now. Thanks John1 Report this Post to the Staff
SsuperDdave Moderator United States 23522 Posts	Posted 04/28/2015 1:11 pm The more open (bigger number) the Aperture - F-stop - the less the depth of field. Better depth of field costs you light. P&S cameras do better for DoF at a given aperture than dSLR's but you probably do better at a bigger number than 2.8. If your images are fuzzy that might be part oc the cause. Bigger ISO's take the light loss pressure off of smaller apertures, and we all have to juggle those numbers. Never said this was simple. Report this Post to the Staff
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