Hi, thanks for the answers, I will be investing in ND filter for future use.

I do have one more question

I am wondering why some of my pictures turn out very sharp and clear and other have no edge or sharpness to them at all for example this penguine I took a picture of is so clear and sharp

https://dl.dropbox.com/u/67730394/IMG_0762.JPG

1/640 sec f/5.6 iso 320

Yet this monkey I took a picutre of, has no sharpness or real detail about it, is it becasue it was a darker day or becasue I had my shutter speed up high?

https://dl.dropbox.com/u/67730394/IMG_0721.JPG

1/1600 f/5.6 iso 1000


I do have IS on my lens but I think it takes a better picture with it switched.

I do have a very stead hand so I presume it's not from hand movement