SEL1018 (E 4/10-18 OSS) (E 10-18mm F4 OSS)
4-10
4-3-3. Photographic Resolving Power Check
Equipments and Tools
• Resolution Check Chart (ILC)
• Camera (General E-mount Interchangeable Lens Digital Camera with APS-C Size)
• 40 inch LCD monitor (Full HD)
Note:
When checking and adjusting, check the resolution by expanding the photographed image.
Setting of Equipments
Note:
This lens must be checked the photographic resolving power in multiple focal length.
1. Set the Shooting Mode of the camera to the Aperture Priority mode and set the f-stop value to the minimum (open).
2. Set the focal length to confirm.
3. Set the camera at the position where a chart appears in the whole screen. Furthermore, move it to the 100 mm rear from that position.
1125mm x 750mm 3:2 2015.12.15 LENS Gp
0.8
0.6
0.5
0.3
0.3
0.5
0.6
0.8
Checking Method
1. Set to manual focus on status that the “Setting of Equipments” condition.
2. Focus and shoot with self timer.
3. Keep focusing as step 2, change the object distance to the shooting distance position ± 100 mm of step 1, then shoot two times with self timer.
4. Check the three images to see if the resolution of the patterns in four corners meets the standard shown in the below.
1125mm x 750mm 3:2 2015.12.15 LENS Gp
0.8
0.6
0.5
0.3
0.3
0.5
0.6
0.8
*Check the center circle (red frame) and the other peripheral
circles (blue frame) at the same magnification.
Note:
Check if the circle in the center is resolved clearly. Then, check to ensure the other circles (24 circles) are resolved symmetrically in vertical and horizontal
directions. (A circle and its counterpart on the diametrically opposite side are resolved equally.)
* Use Adobe Photoshop to check the image resolution.
4-4. RESOLVING POWER ADJUSTMENT
4-4-1. Resolving Power (Partial Blur) Adjustment
1. Lightly loosen the three screws that are fixing, adjust (shift) the 2 Group Service Assy.
2. Perform the check and adjustment repeatedly until the partial blur is resolved.
Note:
If the partial blur cannot be resolved even after the adjustment, replace the Optics Unit For Service.
3. If the partial blur is resolved, tighten the three screws and apply the adhesive bond (B-10) to the screw head.
Screws
2 Group Service Assy
Apply the adhesive
bond (B-10)
