Sunday, September 27, 2015

I have begun to experiment with neutral density filters to learn how to make long exposure photographs.  I don't know what's involved with digital cameras and this technique, but with film it's mostly a lot of careful calculation and consultation with reciprocity failure graphs.  (RF is the falloff of film's sensitivity with extended exposure that is compensated for with still longer exposure which  has to be fairly precise.)   To do this, I'm using my oldest medium format camera, a Mamiya C220.  The reason is that it uses no battery, so exposure can last as long as necessary.  This photograph was only a one second exposure, but I used a fast film (ISO 400) so couldn't extend the time given the brightness of the scene.  I'm learning.  More to come!  (Film, of course!)

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