ISO settings - what should I be seeing ? help please

[sparksey]

Hi Im a new member and recently started an online photography course, I have been told to take photo's inside and outside using "Aperture" mode set to F8 and changing the ISO settings from lowest to highest, enlarging the images to 300% and noting any changes from high to low and from inside to outside,paying attention to shadows.

Ok so I have done all that and have seen that the images are "grainier" the higher the ISO especially the outside images in the shadows and that the indoor images are not as "grainier" at the highest setting. Should I be seeing something else or am I not doing something right ? I have an Olympus E500 and just getting to grips with it.

Thanks in advance

Sparksey

[dcclark]

That's about right. High ISOs make images "grainy" (also called "noise"). At very high ISOs (usually around ISO 1600 or 3200, depending on your camera), the noise should start to be so obvious that, even at small sizes, you can clearly see it.

Also, be sure to look at your shutter speeds. As your ISO goes up, the shutter speed should be getting faster. That's one of the reasons to use a high ISO (despite the noise) -- if you need a fast shutter speed, a high ISO can help you get that even in low light.

[inkista]

You may also want to note that when you double your ISO, you're also doubling your shutter speed: it's proportional.

[Preacherman]

Originally Posted by sparksey

Hi Im a new member and recently started an online photography course, I have been told to take photo's inside and outside using "Aperture" mode set to F8 and changing the ISO settings from lowest to highest, enlarging the images to 300% and noting any changes from high to low and from inside to outside,paying attention to shadows.

Ok so I have done all that and have seen that the images are "grainier" the higher the ISO especially the outside images in the shadows and that the indoor images are not as "grainier" at the highest setting. Should I be seeing something else or am I not doing something right ? I have an Olympus E500 and just getting to grips with it.

Thanks in advance

Sparksey

Hi Sparskey, and welcome to DPS. I hope you enjoy being with us and post some of your shots so that we can all learn together. These are just the sort of questions that many of us can learn from. Cheers. PAUL