14-MAR-2007
17-40L with "kit" hood, EW-83E
Note that this is actually its narrowest aspect, it is quite a bit broader when viewed the other way. The hood is elliptic, being around 15mm longer measured side-to-side. This is impractical when carrying more than one lens as the hood simply will not fit any reasonably sized container.
14-MAR-2007
17-40 with alternative hood, EW-83D
This hood is often suggested as a more effective and more practical hood for this lens on a crop camera. It does not vignette on a 1D-sized sensor (1.28 crop). It is also circular rather than elliptic and will fit into a container that is appropriately sized for the lens itself.
14-MAR-2007
The "D" actually fits inside the "E"
This image shows the difference between the two hoods rather dramatically - the EW-83D nestled inside the EW-83E with room to spare!
14-MAR-2007
Dremeled down upper petal
Here I have removed perhaps 1mm of material from the extreme end of the petal. The corners have also been rounded slightly - compare the outline of the closer (upper) petal with the outline of the original, unmodified lower petal. Some scratch marks from the Dremel tool is visible - it may not be pretty but it works!
14-MAR-2007
Dremeled down side petal
A very small shade of vignetting was visible at either side of the image, so I have removed just a bit of material from the tip of either side petal.
14-MAR-2007
Unmodified lower petal
Prior to doctoring. Compare its squarish shape with the more rounded, modified top petal, slightly out of focus at the far end.