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Follow the steps below to adjust the relay back focus.
Steps Instructions Explanatory Notes
1 Release the hex screw k (1.5mm) by about a
half a turn. Now the ring is free for adjustment:
2 Leave the Iris on the relay lens fully open and
adjust the back focus ring until you have
achieved the sharpest image.
3 Check that the film lens is at the best focus
before you check the back focus a second
time.
You will need a good quality monitor to
accurately judge the sharpness.
4 Once satisfied with the image, lock the hex
screw to secure this adjustment and double
check the image.
By using a Putora 7A9 chart you will be able to
see the moiré effect of the test circles visible
through the relatively low definition of the
viewfinder.
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