TABLE OF REGISTERS - For MPP Large Format Cameras. Registers vary from model to model only the later models matching the international standard. International standard dark slides are currently made, Fidelity and Toyo being examples. It may be necessary to stop the lens down when using international standard dark slides in non standard cameras. Older cameras if required can be checked and screen registers adjusted before using for meticulous work. Wear will reduce registers especially on Mk I - Mk VI MicroTechnical cameras. The list below gives details. Some early and non standard cameras have been noted fitted with International Backs probably resulting from factory repair/upgrading.

DATA - is from published information and tests carried out on a number of sample cameras.

Registers of MPP Large Format Cameras
Model	Register	Intnl Std
:: MicroTechnical Cameras
Mk I	Unknown	No
Mk II / III, MkVI to S/No. 5999	0.200 inch / 5.08mm	No
Mk VI from S/No. 6000	4.85 - 4.90	Yes
Mk VII - VIII	4.85 - 4.90mm	Yes
:: MoD & Government Cameras
S92	0.187 inch	No
MonoRail Cameras	4.80mm	Yes
Prison Mugshot Camera	4.85mm?	Yes
:: MicroPress Cameras
Early Version	0.200 inch / 5.08mm	No
Later Version	4.8mm	Yes
:: MonoRail Cameras
5 x 4	4.8mm	Yes
7 x 5	4.8mm	Yes
10 x 8	4.8mm	Yes