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EF 300mm f/4 L or f/4 L IS?

Started 6 months ago | Discussions thread
John Crowe
John Crowe Veteran Member • Posts: 3,476
EF 300mm f/4 L very close to EF 300/2.8 L.
2

I have only had the non-IS.  Back in the day it was said that the extra IS glass reduced IQ marginally.

I tell myself that my original 300/2.8 is sharper and has faster AF, but boy it is very close!  Both with a Canon 1.4x are still superb and have fast AF.

I had no problem tracking race cars and bikes with the 300/4 L and EF 1.4x during panning.  The 300/2.8 L and EF 1.4x III is marginally better.

 John Crowe's gear list:John Crowe's gear list
Canon EOS 5DS R Canon EF 70-200mm F4L USM Canon TS-E 17mm f/4L Kenko Teleplus Pro 300 AF 1.4x Venus Laowa 12mm F2.8 Zero-D +15 more
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