Quote:
Originally Posted by Canon Kid
to get bluer Sky's and greener grass what filter do I need to use
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No need to use a filter, as I've said in another of your threads. Try using the exposure compensation function to under expose the shot, this will keep some colour in the sky. Shoot in raw format. Then, process the raw file twice, once to get the scene "correctly" exposed, and the second time to keep the blue in the sky. Put both these images into photoshop as two layers with the blue sky layer on top. Remove the darker area of the underexposed shot keep the bluer sky showing and the correctly exposed foreground from the layer underneath.
If you must use a filter, (or, if you must spend your money) then get an ND grad as Andy already said in your other thread.