Canon EF 300mm f/2.8L IS II USM review

What price for perfection in a super-fast telephoto camera lens?

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As part of our test of the Canon EF 300mm f/2.8 IS II USM we've shot our SFR Plus chart at every aperture to check for sharpness and fringing across the frame. The resulting images are then fed through the Imatest Master software.

The graph below shows the results of the test, with each of the coloured lines depicting the lenses performance at the centre (in blue), and an average of the results for the middle of the frame (pink) and the image edge (yellow).

Canon ef 300mm f 2 8l is ii usm sharpness
Canon ef 300mm f/2.8l is ii usm sharpness

The graph shows that the Canon EF 300mm f/2.8L IS USM performs well across the aperture range, with the best results for sharpness achieved between f/4 and f/7.1.

As usual the lens performs best at the centre, but at most apertures the edge performance is not far behind.


Canon ef 300mm f 2 8l is ii usm fringing
Canon ef 300mm f/2.8l is ii usm fringing

This graph shows that signs of fringing are low across the aperture range. Despite the expected rise at the edge of the frame the amount of fringing is still very low.

Tech Specs

Product TypeLens
Fixed Focal Length300 mm
Lens Mount TypeCanon EF/EF-S
Brand NameCanon
Filter Attachment Diameter52 mm
Lens TypeSuper Telephoto
Depth248 mm
Product SeriesL

Canon EOS DSLR Cameras

ManufacturerCanon, Inc
Product Model4411B005
Product Name4411B005 Lens
Product LineEF
Manufacturer Part Number4411B005
Manufacturer Website Address
Marketing Information

High-performance L-series super-telephoto lens, with 4 stop Image Stabilizer with 3 modes ideal for all types of action photography. The EF 300mm f/2.8L IS II USM delivers outstanding image quality in a robust lightweight construction.

Weight (Approximate)2.40 kg