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Light Loss with Angineaux 9.5-57mm Dogleg Lens


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#1 Mike Lary

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Posted 21 March 2009 - 01:19 PM

Does anyone have a user manual for this lens or know offhand how much light is lost through the reflex prism on the dogleg viewer? A buddy of mine picked one up for his CP-16 and the first roll of film he ran through came back a stop or two darker than unexpected. We're trying to avoid burning a bracketed gray card test if possible. Thanks in advance.
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#2 Leo Anthony Vale

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Posted 24 March 2009 - 03:31 PM

Does anyone have a user manual for this lens or know offhand how much light is lost through the reflex prism on the dogleg viewer? A buddy of mine picked one up for his CP-16 and the first roll of film he ran through came back a stop or two darker than unexpected. We're trying to avoid burning a bracketed gray card test if possible. Thanks in advance.


The finder loss is in the 1/4-1/3 of a stop range.

The lens' f/stops also ramp down toward the long end. It should open to the widest f/stop, f/1.6-T1.9, only between 9.5mm and 14mm, quite a useful range, really.

When they came from the factory there were locks to keep one from zooming into an area of the zoom which did not have the same maximum stop as the area you started from.

The 9.5-57 at Sawyer's did not have the stops in it. So some were modified after the factory.

The f/stop difference between the ends of the zoom were less than a stop, but adding in the finder light loss would bring the light loss close to a full stop.
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