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Old 30th June 2009, 07:34 PM
Richard Gould Richard Gould is offline
Join Date: Dec 2008
Location: Jersey Channel Islands
Posts: 5,326

I have used extension tubes in the past,not on a bronny but an old mamiya that hs long gone,and I used to increase exposure between half to one and a half stops depending on which extension tube,or combination I was using,this was a rule of thumb, but it worked and should give you a starting point,Richard
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