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Brainwave to solve the vignetting! Make a forward-mounting adapter using a lens bottom cap to accomodate the bayonet mount. I have a choice of caps to work with. From left to right: Kenko, Sigma, Canon, Canon. Yes, Canon apparently changed their cap design at some point to use a little less plastic. I choose the Kenko (from my new set of extension tubes!) because it is the lowest.
Copyright © 2005, Norm Lyon

Brainwave to solve the vignetting! Make a forward-mounting adapter using a lens bottom cap to accomodate the bayonet mount. I have a choice of caps to work with. From left to right: Kenko, Sigma, Canon, Canon. Yes, Canon apparently changed their cap design at some point to use a little less plastic. I choose the Kenko (from my new set of extension tubes!) because it is the lowest.

File: 1D__1040.JPG
File size: 692KB
Image Serial Number: 000-1040
Camera Model: Canon EOS-1D Mark II N
Camera serial number: 0000404701
Firmware: Firmware Version 1.0.0
Date/Time: 2005:12:19 20:24:20
Shutter speed: 1/125 sec
Aperture: 4
Exposure mode: Av
Flash: Off
Metering mode: Evaluative
Drive mode: Single frame shooting
ISO: 800
Lens: 17 to 40mm
Focal length: 38mm
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:
"Brainwave to solve the vignetting! Make a forward-mounting adapter using a lens bottom cap to accomodate the bayonet mount. I have a choice of caps to work with. From left to right: Kenko, Sigma, Canon, Canon. Yes, Canon apparently changed their cap design at some point to use a little less plastic. I choose the Kenko (from my new set of extension tubes!) because it is the lowest."