PhaseOne 645DF - Page 135

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17.2 Viewnder Masking
The image area of the Contax 645 camera is 56x41.5 mm. A viewnder mask
is only needed for the smaller size of the IQ140 CCD that measures 44x33mm.
Viewnder masking is not necessary for IQ180 and IQ160 models as their
light sensitive CCD measures 53.9x40.4 mm.
Please check page 142 for the relevant viewnder mask.
Insert a Viewnder Mask
1. Remove the protection tape from the mask.
2. Dismount the prism/waist-level nder and remove the focus screen.
3. Place the viewnder mask in the bracket that holds the focusing screen.
4. Re-mount the viewnder focus screen.
5. Re-attach the prism/waist-level nder.
N.B. Please check the relevant Contax 645 manual regarding how to dismount
the viewnder and remove the focus screen.
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