I started using a horseman universal zoom finder i picked up cheap. It seems to be be very inaccurate. Maybe someone who uses one of these could enlighten me. It has a 4x5 mask and when dialing in a focal length in the 4x5 scale, it's just wrong. I had a 200mm imagon lens mounted and needed to set the viewfinder at 135mm to get the same frame.
maybe it's been misassembled? With the mask removed, and when dialed to 90mm, the inside element is racked completely forward as far as it could go. I haven't given it an in depth workout, but with a 250mm lens mounted, correct frameing is found at 180mm on the dial. Thanks for any insights
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