Canon - Canon Lenses

EF 100mm f/2 USM

*LEns Specification*
Lens	EF 100mm f/2 USM
Focus Drive	USM
Angle of View
Construction (groups-elements)	6/8
Minimum Aperture	22
Closest Focusing Distance	Feet	Meters
		0.9
Filter Size (mm)	58
Hood	ET65II
Length	Inch	Millimeters
		73.5
Weight	Ounce	Grams
		460

Related Links

Personal Opinion

This lens feels and looks very much like its sibling, the EF85mm f/1.8 USM. It is only slightly longer than the EF85mm from the Manual Focusing ring onwards.

This means that for both lens, the Manual Focusing rings are the same distance from the lens mount. This makes it a snap to get used to either lens if you have the other.

The difference in focal lengths is really not that much of a difference. Personally, I prefer the EF100mm but different users will have different preferences I guess.

The surprising thing is that on both the EOS5 and EOS1n, the EF100mm "glides" into focus, whereas the EF85mm seems to "snaps" into focus. I am surprised because both are USM, and both are of very similar built.

Both weighs about the same with the EF100mm slightly heavier.

Conclusion? No difference in both the lenses (except, of course the focal length and maximum aperture). That little 0.2 of f/stop difference shouldn't be the deciding factor for anybody wanting to compare before deciding which one to get. Instead, I suggest using the 15mm difference as the deciding factor.

Feel free to give me feedback or new links.

All pictures scanned from Canon brochures, in which the original image is actually about 10 times smaller than the image that you see above.
Hence, the resolution of the above image is limited by the original size of the brochure image. The image above is life-size.