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two mirror alignment systems for photography

checking alignment of 4x5 view cameras-to-copy

The "parallelism plate" (see drawing to the left) in the ZP4 system duplicates the weight distribution of a Better Light scan back and is close to the weight of other scan backs. It totally eliminates dis-assembly of the camera when checking parallelism of the CCD/film standard to the copy. A large mirror for the copy plane is provided.

To check alignment of the lens and CCD/film planes, ZP4s contain a 3.3" ring module to attach to a spare lens board that faces the square mirror on the plate.

Diagram for Mirror Alignment

ring module systems format range of camera to copy


4x5 0 - 10 ft


4x5  0 - 20 ft

checking alignment of small & medium format cameras-to-copy

When a ring module is epoxied onto an adapter ring that is screwed into your lens, you can look directly through the camera to view the alignment pattern shown on a mirror at the copy plane. The adapter rings we use are made by B+W™ and Heliopan™ and thus are extremely accurate.

A ZC8 contains a 2.6" ring module in an adapter ring with 49, 52, 55, or 58mm accessory/filter threads. A ZC9 contains a 3.3" ring module in an adapter ring with 62, 67, 72, or 77mm threads. When ordering, you need to know the filter thread diameter in mm (see adapter rings below). 

Round Mirrors

ring module systems camera position range of camera to copy


facing down 0-8 ft


facing a wall—can also be used facing down 0-8 ft


facing down 0-12+ ft


facing a wall—can also be used facing down 0-12+ ft

adapter rings

order a ZC8 for these lens diameters:
- 49mm
- 52mm
- 55mm
- 58mm

order a ZC9 for these lens diameters:
- 62mm
- 67mm
- 72mm
- 77mm