Quote Originally Posted by ~Cathi~ View Post
Ok, this is my first attempt at putting photos up on here, so I hope I've done it right! I totally see the difference between ISO 100 to ISO 1600.. I had my camera set on F/5.6 and not only is there a definite presence of noise in the 1600 shot, it is also alot brighter. I also wanted to note that they were taken at different distances because the bees weren't liking me being so close to their food hehe
The reason the 2nd one is brighter is the ISO is 16 times more but the shutter speed is only 4000/800 = 5 times more.
So these two photos have been taken with a different exposure!

So lets change the first one to 1/250 and f/11 ISO 100 and the second one to 1/4000 and f/11 ISO 1600 they would be much closer.

Does that make sense?
It is a very important concept - getting the exposure triangle right!
Refer 2nd post in this thread: http://www.ausphotography.net.au/for...ad.php?t=24050