Description
Ilford produces twelve Multigrade filters that are numbered 00 – 5 in 1/2 steps, with the lowest filter number corresponding to the softest contrast.
Filters are available in sets of filters 3-1/2 x 3-1/2″ (8.9 x 8.9cm) and 6 x 6″ (15.2 x 15.2cm ). They can be used above or below the lens and can be cut to fit the enlarger filter drawer.
Multigrade filters are very easy to use: no complicated calculations are needed when changing from one filter to another. The exposure time for filters 00 – 31/2 is the same; that for filters 4 – 5 is double.
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