4-6-2. Flange Back (f'F) Adjustment
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50mm)
1. Adjustment Procedure
Perform "4-6-1. Flange back (f'F) Check" and confirm that the flange back value (f'F) of lens to be checked does not meet the
specification in Table 4-6-1.
Set the focus of lens to be checked to the infinite end.
Viewing the microscope, turn the knob of flange back tester to focus.
Using the formula below, calculate the shift amount (X).
Shift amount (X) = f'F (measured value) with focal length "16 mm" at the infinite end - 44.59 mm
X = Shift amount to be adjusted by the back adjustment washer
According to the result in step 4), adjust the thickness of back adjustment washer
Measure the thickness of back adjustment washer with a micrometer (or a caliper). (Refer to Table 4-6-2.)
• In case of negative value (-) of shift amount (X), make the back adjustment washer thinner by x.
• In case of positive value (+) of shift amount (X), make the back adjustment washer thicker by x.
Back Adjustment Washer
Select the coupler adjustment washer of the thickness as same as back adjustment washer, and replace the coupler adjustment washer.
Coupler Adjustment Washer
SAL16105 (DT 3.5-5.6/16-105) (DT 16-105mm F3.5-5.6)
BACK ADJUSTMENT WASHER A
BACK ADJUSTMENT WASHER B
BACK ADJUSTMENT WASHER C
BACK ADJUSTMENT WASHER D
BACK ADJUSTMENT WASHER E
COUPLER ADJUSTMENT WASHER A
COUPLER ADJUST WASHER B
COUPLER ADJUSTMENT WASHER C
COUPLER ADJUSTMENT WASHER D
COUPLER ADJUSTMENT WASHER E