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DSLR Release Modes and Exposure (Video Tutorial)

This week's video tutorial will explain what your DSLR's shutter release modes, exposure metering, and exposure compensation controls do, how you control them, and when to use them.

nikon a12 amber filter

blue island , Jan 28, 2005; 04:03 p.m.

Hi. Can someone clarify regarding the nikon a12 amber filter. For colour this reduces colour temp ... yes? For B&W it will have a similar effect to a yellow filter? (more or less contrast?)

Many thanks in advance


Ellis Vener , Jan 28, 2005; 04:09 p.m.

it will have a very, very mild effect on contast. A12 = Wratten #81A filter = KR1.5

Michael R. Freeman , Jan 28, 2005; 06:14 p.m.

Ellis - I think you are thinking of the A2 (81A). The A12 is much stronger and is roughly equivalent to an #85 (KR-12). As to its effect on B&W film in comparison to a yellow filter, I haven't a clue.


Arnab Pratim Das , Jan 28, 2005; 06:48 p.m.

Michael is right, I use the Conversion A2 all the time with film (one on each lens as the proverbial "protector") and it has a light, though visible effect. My only one A12 is quite strong, to the extent that I take care not to use it in the late afternoons.

With digital I use neither. I used to use the A2 on my D70 but later figured I had to do manual WB corrections to crank up the color temperature most of the time. So I replaced them with L37C for digital work.

Arnab Pratim Das , Jan 28, 2005; 09:28 p.m.

To answer original question -- for BW photography even the A12 will hardly have any effect (IMHO).

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