SELP1650 (E 3.5-5.6/PZ 16-50 OSS) (E PZ 16-50mm F3.5-5.6 OSS)
4-5
4-4. IMAGE QUALITY CHECK/ADJUSTMENT
4-4-1. Adjusting Procedure
Check/Adjusting Procedure
Check the
resolving power (partial blur)
section 4-5-2
OK
OK
NG
NG
Adjust the flange back
OK
NG
NG
OK
Image Quality
END
Partial blur
Focus
Replace the Lens (Note2)
Replace the Lens (Note1)
resolving power (partial blur)
Check the
resolving power (partial blur)
section 4-5-2
Note 1:
If the result of the projective resolving power (partial blur) check is NG, replace the 1 Group Block Assy.
* If it cannot be resolved even after replacing the 1 Group Block Assy, replace the Service Exclusive Optics Block.
Note 2:
If the result of the flange back check (after adjustment) is NG, replace the 1 Group Block Assy.
* If it cannot be resolved even after replacing the 1 Group Block Assy, replace the Service Exclusive Optics Block.
Fig.4-5-1
266.5 mm
200
mm
4-5. RESOLVING POWER CHECK/ADJUSTMENT
Tools and Equipments
• Resolving power check chart (Note)
* Download the resolving power check chart from the TISS homepage.
• Camera (NEX-3/5)
Note:
Prepare the resolving power check chart according to the procedure shown below.
1. Download the [Focus-Chart_A3.pdf] from TISS homepage.
2. Print the [Focus-Chart_A3.pdf] sized by 100%.
4-5-1. Preparations
1. Set the Shooting Mode to the Aperture Priority mode and set the f-stop value to the minimum (open).
2. Set the camera at a shooting distance of 1300 mm (imager surface) and set the zoom at the TELE end.
3. Focus to make the chart aligned equally in all directions.
4-5-2. Resolving Power (Partial blur) Check
1. Set to manual focus on status that the “4-5-1. Preparations” condition.
2. Focus and shoot with self timer.
3. Keep focusing as step 2, change the object distance to 1200 mm and 1400 mm, 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 Fig.4-5-2.
NOTE:
Check if the patterns on the four corners are visually as the same resolution.
*
Use Adobe PhotoShop to check the image resolution.
Fig.4-5-2
Near the limit
*
Check the five patterns in center and four corners at the same magnification.
OK
OK
NG
NG or out of focus
