|
ISO settings
Can anyone please explain to me the difference.
What I cant understand is......everyone tells me to use like 800 ISO or it is favored even 400 is very popular....what i would like to know is what's the advantages and disadvantages of using high or low ISO's.
I have found that the very high ISO's like 1600 or even 3200 enables me to get much more detail then at 800 for my 30 second exposures....is this because my exposure's are short....and if this is the case whats the difference doing a 2 minute exposure say at ISO 800 and doing a 30 second exposure at 3200 ISO.
I did some 90 second exposures at 400 ISO and also some 30 second exposure's at 3200...I thought the 30 second exposure gave me more detail....obviously if I went much longer at 3200 it would be all washed out in a ball of light....so at the moment I am failing to see the full benefit too long exposure's in suburban area's....I must be missing something.
Any info/help is much appreciated
|