Canon EF 100-300 f5.6 L

First the facts from the Canon literature:

Marketed June 1987
Original Price 93,800 yen
Lens Construction (group) 10
Lens Construction (element) 15
No. of Diaphragm Blades 8
Minimum Aperture 32
Closest Focusing Distance (m) 1.5
Maximum Magnifcation (x) 0.26
Filter Diameter (mm) 58
Maximum Diameter x Length (mm) 75 x 166.6
Weight (g) 695

High-performance 3x telephoto zoom lens. Synthetic fluorite in group 1 and UD glass in group 2 achieve low refraction and low dispersion. They also effectively correct chromatic and other aberrations. Resolution is high throughout all focal lengths. Images are sharp and crisp. At the 300mm focal length, 0.25x magnification is possible.

I did not know this lens existed when I got a chance to shoot a bit with it. Of course I was immediately attracted to the L designation. Zooming is done like the EF 100-400L monster, but here there are no lock rings. This means the lens creeps at the slightest tilting. This lens has a new definition of slow focusing for me… it takes ages to focus. The noise produced when focusing reminds me that of a plane retracting its landing gear.

The test is made in a real world situation. The realworldness comes from the fact that the shots were taken raw and then processed to tiff with DPP 2.0.3.7 with its default params, meaning some sharpening has been applied, but anyway that’s most people’s workflow. All shots were taken with a 20D, mounted on a sturdy Manfrotto tripod using cable release and mirror lockup. Here is a quick set of tests and comparisons against the cheapo EF 100-300 f4.5-5.6.

I won’t comment on the results presented here. It’s up to you to interpret the images.

I apologize for my stupidity of not taking shots of the same part of the building with the two lenses.

Center performance at 100mm

F number 100-300 f5.6 L 100-300 f4.5-5.6
f 5.6
f 8
f 16

Corner performance at 100mm

F number 100-300 f5.6 L 100-300 f4.5-5.6
f 5.6
f 8
f 16

Center performance at 300mm

F number 100-300 f5.6 L 100-300 f4.5-5.6
f 5.6
f 8
f 11
f 16

Corner performance at 300mm

F number 100-300 f5.6 L 100-300 f4.5-5.6
f 5.6
f 8
f 11
f 16

Автор: Стефан Димов

The best labor-saving device of today is tomorrow.

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