Most of the best Graduated Neutral Density filters (aka ND grads or GND filters) are of the slot-in variety, but these circular ND grads screw directly into your lens's filter thread without the need ...
Amateur Photographer on MSN
Best camera filters for photographers – refine your images in camera
Rod Lawton and the AP team recommend the best camera filters for photographers to buy, for effects that can't be replicated ...
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