Canon EF 300mm f/4 USM L IS - Review / Test Report - Sample Images & Verdict
Lens Reviews - Canon EOS (APS-C)

Sample Images

Ok, finally here're some sample shots taken with the EOS 350D (converted RAWs and sharpened straight JPEGs).

Click on a thumbnail to view the original file (opens in a separate window). Please note that the originals are FULL SIZE samples (=several megabytes) thus requiring a significant amount of bandwidth so please take care of the limited resources here.

Make Canon
Model Canon EOS 350D DIGITAL
ISO Speed 400
Focal Length 420.0mm
Exposure Data: f/5.6 @ 1/250s
Size 3472x2312
Make Canon
Model Canon EOS 350D DIGITAL
ISO Speed 400
Focal Length 420.0mm
Exposure Data: f/5.6 @ 1/800s
Size 3472x2312
Make Canon
Model Canon EOS 350D DIGITAL
ISO Speed 400
Focal Length 300.0mm
Exposure Data: f/4.0 @ 1/160s
Size 3472x2312
Make Canon
Model Canon EOS 350D DIGITAL
ISO Speed 400
Focal Length 300.0mm
Exposure Data: f/7.1 @ 1/200s
Size 2312x3472
Make Canon
Model Canon EOS 350D DIGITAL
ISO Speed 200
Focal Length 300.0mm
Exposure Data: f/5.6 @ 1/200s
Size 2304x3456
Make Canon
Model Canon EOS 350D DIGITAL
ISO Speed 200
Focal Length 300.0mm
Exposure Data: f/4.0 @ 1/1600s
Size 3456x2304

Verdict

The EF 300mm f/4 USM L IS is an excellent lens both regarding build and optical quality. The naked lens performed near-flawless both in the lab as well as in the field where the IS helped in many situations. Combined with the EF 1.4x II converter the quality remains on high level but there's a little penalty here equivalent to about a school mark. Subjectively there's also a slight loss of contrast which cannot be surprising regarding the number of optical elements involved in the converter combination.

Two samples of this lens were tested during the last year with the 2nd one being substantially better. All tested lenses are supplied by users so they've already seen some field usage over time. Nonetheless the variations in quality are disappointing for a designated L class lens. Assuming you can get a good one the EF 300mm f/4 USM L IS is a highly recommended lens.

Optical Quality:    
Mechanical Quality:
Price/Performance:
      
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