Cokin graduated ND filters are just the ticket for landscapes where the sky is particularly bright and thus susceptible to being over exposed or when you want a darker, moodier sky. The filter retains normal colour balance across the visible spectrum, with a progressive graduation from the middle to the top of the filter. For those familiar with the Cokin line, the P121M filter has the same colour as the 121 filter, but a lower tone.
Price: £30.99 from Wex Photographic
This Gradual Neutral Grey reduces the total amount of light reaching the film, but without affecting the colour balance. It restores the balance between the main subject and the foregroundbackground.
The Cokin Z121M has a progressive graduation from the middle to the top of the filter, with the same colour as the 121 filter, but with a lower tone.
Progressive graduation from the bottom to the top of the filter, same colour & tone than 121. According to the classic rules of landscape layout, the sky occupies 35 of the space above the line of horizon, whether real or imaginary. In photography, this...
