EF-M55-200mm F4.5-6.3 IS STM?

Started Jun 16, 2014 | Discussions thread
Jonathan Brady
Jonathan Brady Veteran Member • Posts: 6,720
Comparison (weight/length) to CANON's EF-S 55-250 STM

The EF-S 55-250 STM is actually just a touch longer than the E mount Sony tele lens mentioned above (3 mm longer) and heavier (30 grams heavier). But, if you're talking about mounting the EF-S 55-250 to the M, you obviously need the adapter as well. You're adding an additional 28mm and 110 grams. So, here's the final comparison...

EF-M 55-200 f/4.5-6.3 IS STM vs EF-S 55-250 f/4-5.6 IS STM + EF to EF-M adapter

Weight: 260 grams vs 485 grams

Length: 87mm vs 139mm

Focal range: 55-200 (88-320 FF equivalent) vs 55-250 (88-400 equivalent)

Aperture: f/4.5-6.3 vs f/4-5.6

So, the EF-M lens is 37% shorter and 43% lighter! Obviously, the EF-M 55-200 is 1/3 of a stop slower at the wide and tele end and is slightly lacking in the "reach" department. The diagonal angle of view at 320mm is 7.7 degrees and the diagonal angle of view at 400mm is 6.2 degrees. So, 1.5 degrees. Significant... but also NOT significant.

I said it before, I think the focal range and aperture range compromises were VERY smart on Canon's part!

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