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Canon 40mm 2.8 STM size (The Canon unholy trio)

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Jan 23, 2011
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A size comparison:

7422473384_261a44acd5_b.jpg


My corgi also reacted in an odd way to the sound of the STM motor:

7422474430_264fc55a91_b.jpg
 
I'm curious to see how the bokeh compares between the 40mm and the 50mm so could you please put together a direct comparison (scene for scene) under a variety of conditions?

Bonus Challenge: Include the 85mm 1.8 USM in this comparison.
 
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