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I was trying to align the rings by the outside edge, but the glue set too quickly. I then soaked the rings in acetone and separated by tapping a one-sided paint-scraper razor blade between them. (Then clean and re-sand and re-clean...) The second attempt was good but revealed unequal vignetting. I repeated the separation process. In the third attempt I had the plates installed on the camera and lens before adding the glue, and then assembled them "live", with the viewfinder on to see the vignetting.
Copyright © 2005, Norm Lyon

I was trying to align the rings by the outside edge, but the glue set too quickly. I then soaked the rings in acetone and separated by tapping a one-sided paint-scraper razor blade between them. (Then clean and re-sand and re-clean...) The second attempt was good but revealed unequal vignetting. I repeated the separation process. In the third attempt I had the plates installed on the camera and lens before adding the glue, and then assembled them "live", with the viewfinder on to see the vignetting.

File: 1D__0891.JPG
File size: 471KB
Image Serial Number: 000-0891
Camera Model: Canon EOS-1D Mark II N
Camera serial number: 0000404701
Firmware: Firmware Version 1.0.0
Date/Time: 2005:12:14 21:58:02
Shutter speed: 1/50 sec
Aperture: 4
Exposure mode: Manual
Flash: Off
Metering mode: Evaluative
Drive mode: Single frame shooting
ISO: 200
Lens: 17 to 40mm
Focal length: 40mm
AF mode: One-shot AF
Image size: 1728 x 1152
Rotation: none
Image quality: Fine
White balance: Tungsten
Color space: sRGB
Custom Functions:
CFn 2: No exposure without CF card
CFn 5: Manual Tv/Av set: Quick dial/Main dial
CFn 8: Top LCD panel: ISO, Back LCD panel: Remaining shots
CFn 18: Hold Assist button for registered AF point
CFn 20: AI Servo tracking: Slow
User comments:
"I was trying to align the rings by the outside edge, but the glue set too quickly. I then soaked the rings in acetone and separated by tapping a one-sided paint-scraper razor blade between them. (Then clean and re-sand and re-clean...) The second attempt was good but revealed unequal vignetting. I repeated the separation process. In the third attempt I had the plates installed on the camera and lens before adding the glue, and then assembled them "live", with the viewfinder on to see the vignetting."