August 01, 2014, 06:55:51 AM

Author Topic: Canon EF 100-400 f/4-5.6L IS Update [CR2]  (Read 18209 times)

mrsfotografie

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Re: Canon EF 100-400 f/4-5.6L IS Update [CR2]
« Reply #90 on: August 10, 2013, 07:36:18 AM »
The only negative of the 300 F4 L IS, IMHO, is the weak 1st gen IS system. I know photogs who have sold their 300 2.8's for 300 F4's, insisting on a combo of 300 F4 IS and 600 F4 IS or 500 F4 IS.

I have considered this idea before; with a DOF as thin as it is at 300 mm f/4 (and a lens that is sharp wide-open), who needs f/2.8?

I do. The 300mm f/2.8 II works brilliantly with the 2xTC III to give a 600mm at f/5.6. The 300mm f/4 with the 2xTC is poor and also is f/8. The bokeh at f/2.8 is superb, and the extra stop gives greater versatility.

Thanks, hadn't considered that. Aside from the benefits of TC versatility, and obviously the AF benefit of having f/2.8, how hit and miss is f/2.8 at this focal length?
5D3, 5D2, NEX-6 | SY14mm f/2.8, Ʃ20mm f/1.8, 24mm f/2.8, 35mm f/2, Ʃ35mm f/1.4A, 50mm f/1.8 I, Ʃ50mm f/1.4 EX, 100mm f/2.8L Macro, 17-40L, 24-105L, 70-200 f/2.8L IS II, 1.4x II, 70-300L, 100-400L | E-mount: SY12mm f/2, Ʃ19mm & 30mm f/2.8 EX DN, 16-50 & 55-210 OSS | 2x FT-QL, AE-1P, FD(n) & FL primes

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Re: Canon EF 100-400 f/4-5.6L IS Update [CR2]
« Reply #90 on: August 10, 2013, 07:36:18 AM »

AlanF

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Re: Canon EF 100-400 f/4-5.6L IS Update [CR2]
« Reply #91 on: August 10, 2013, 02:31:50 PM »
Very, very fast and accurate. Apart from the modern feedback loop technology employed in the newest lenses, the wider the aperture the more the light that is used for processing and the greater the sensitivity. Remember, your lens focusses at its widest aperture when stopped down.
5D III, 70D, Powershot SX50, 300/2.8 II, 1.4xTC III, 2xTC III, 70-200/4 IS, 24-105, 15-85, Sigma 10-20, Tamron 150-600.

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Re: Canon EF 100-400 f/4-5.6L IS Update [CR2]
« Reply #91 on: August 10, 2013, 02:31:50 PM »