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Or use a Rodenstock pocket calculator that quickly and easily, as well as accurately, determines exposure correction based on the image ratio and doesn’t require bellows length or focal length.
It was also sold by Sinar and Linhof. Fits in a shirt pocket, no batteries, also computes Scheimpflug and DOF. Works for all camera formats from 35mm full frame to 810.
Thanks for all the replies
Dan by optical centre I mean nodal point and I think I will mostly be using a 210mm macro sinaron
the image plane meter looks interesting I have the potential for that as my Sinar has a "metering back" but I don't have the probe or meter
dose any body have these ? dose it measure continuous light or just flash ?
I light with continuous light
Bob the Rodenstock calculator looks very interesting and it looks like Linhof and studio has them in stock
best
robin
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