SEL85F14GM (FE 1.4 / 85 GM) (FE 85mm F1.4 GM)
4-8
Focus Setting:
Note:
The focus setting buttons vary with model.
This is not used
Check off
Use this part
(1) Select “JOG” from the focus menu.
(2) Clicking [Focus(Target Dist.)] display the focus JOG operation window.
Select focus step value
Select and enter
focus step speed
Focus drive (near)
Focus drive (far)
Focus position indicator
(3) Adjust the focus position with [Near] and [Far] while selecting “Focus Step” and “Low”/“Mid”/“High”, and then click [OK] to close the focus
JOG window.
10. Read the value of the number of projective resolving power lines (maximum resolving power) of the center projected image (y’ = 0).
11. Read the value (the number of projective resolving power lines) of the thinnest line (resolution limit) that allows recognition of contrast of the
sagittal (S) image and meridional (M) image (three lines) of the peripheral projected image (y’ = 15, 18).
Note:
Be careful of spurious resolution when checking the resolution limit.
Spurious resolution is a phenomenon where fine lines beyond resolving power are visible as black and white stripes as if resolution is made.
In this case, black and white of three stripes are reversed and seen as if they are two or four lines in some cases. Be careful not to confuse this phenomenon
with the resolution limit.
Correct resolution
Spurious resolution
12. Confirm that the number of projective resolving power lines of the S image and M image meets the reference value.
Reference value
Focal length f
(mm)
Projection
distance (m)
Number of the smallest pitched (lines/mm)
Center (y’ = 0)
Peripheral (y' = 15)
Peripheral (y' = 18)
S
M
S
M
85
3.4
More than 80
lines
More than 40
lines
More than 40
lines
More than 25
lines
More than 25
lines
13. If the reference value is not satisfied, perform the “4-4. RESOLVING POWER ADJUSTMENT”.
