EF 20mm f/2.8 USM

very quick focusing

no image stabilizer switch so I have to use a faster shutter speed to avoid camera shake

Good focus system (read about this unique lens) Great value for money Prime lens

Not as sharp as 'L' lenses Plastic build quality Chromatic aberration (however this can be corrected in Camera Raw)

Strong robust construction.

No lens hood supplied. Must be purchased separately.

All good. I spent a lot of time researching wide angle lens before finally choosing the Canon. I made the right decision without doubt.

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beautiful lens- great for fitting more into the frame at close range

Easy to use - Good quality - Not to badly priced

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Low weight

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really good quality lens, super lightweight and perfect all prime all-rounder lens to walk around with. great field of view, and minor (natural in a superwide angle lens) chromatic aberration on the corners, but only noticeable if you have a camera...

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