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Canon 300 f/4 L IS Review

Started May 6, 2014 | User reviews thread
jason sheridan
OP jason sheridan Regular Member • Posts: 146
Re: similar to the 500 f4?

brightcolours wrote:

jason sheridan wrote:

I was by no means comparing the 300mm f/4 with the outstanding 500mm f/4 I or II. I was just mentioning how the field of view is similar for the 300mm when attached to 1.4x converter (480mm equivalent). I have owned the 100-400mm also and found the 2 lenses similar in many aspects but I really appreciate the extra light of the f/4 aperture.

Well, it actually is more like a 500mm f6.4. Not f4.

(300 x 1.6 = 480, f4 x 1.6 = f6.4)

Jay

The 300mm f/4 does acts like a 480mm f/6.4 only for depth of field on a 1.6x crop camera. As for shutter speed and field of view it acts more like a 480mm f/4 (close enough to a 500mm f/4). I personally find I am often wanting more focal length and higher shutter speed, while narrower depth of field is not something I am often wanting for my telephoto work. In fact I am usually trying to balance keeping shutter speed high enough while maintaining adequate depth of field. Not having to stop down as much is actually an advantage, but this is made up for with a full frame camera with better ISO performance and higher resolution.

Jay

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My adventures in nature photography are found at: www.sheridanphoto.com

 jason sheridan's gear list:jason sheridan's gear list
Canon EOS 50D Canon EF 300mm f/4.0L IS USM Sigma 10-20mm F4-5.6 EX DC HSM Sigma 17-70mm F2.8-4 DC Macro OS HSM Canon EF 70-200mm F4L IS USM +3 more
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