Undertstanding the Auto-Focus System of the Canon EOS 7D

EOS 7D
Image courtesy: Andrew Gibson

Interesting post by New Zealand based photographer Andrew S. Gibson. The almost 4 years old Canon EOS 7D (price & specs) is still an outstanding DSLR, with an advanced AF system not previously seen on a Canon APS-C sensor DSLR (and still not featured on any other Canon APS-C DSLR). The AF of the EOS 7D is more advanced than the one sported on the EOS 6D. If you want a more sophisticated AF system you have to go at least for the EOS 5D Mark III.

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Non Scientific Comparison: Olympus 75mm f/1.8 vs Canon Ef 135 f/2L

Canon Ef 135 f/2L

Absolutely non-scientific comparison by Tyson Robichaud between the Olympus 75mm f/1.8 and Canon EF 135 f/2L lenses, the former mounted on an Olympus OM-D E-M5 and Panasonic GX1, the latter on a Canon EOS 5D Mark II and Mark I. Different systems, different sensors, different worlds – but if you are interested to learn how these lenses compare then Tyson's review is right for you.

Canon Ef 135 f/2L
Canon EF 135mm (ISO 200, f/2, 1/8sec)
Olympus 75mm (ISO 200, f/1.8 1/10sec)

 

Yet Another Sigma 18-35mm f/1.8 Review and Sample Pics (slrgear, shockingly sharp images)

Sigma 18-35mm f/1.8
Sigma 18-35mm f/1.8 DC HSM
Adorama | B&H | DigitalRev

slrgear reviewed a pre-production model of the awesome Sigma 18-35mm f/1.8 lens, the first to give you a constant f/1.8 across the zoom range, and at an affordable price ($799). An “an incredible lens at an amazing price” that’s “shockingly sharp”. I am sure this will be the most interesting lens this year (and easily also next year). Can’t wait to have it. Simply speaking: Sigma made everything right with this lens!

Some excerpts from the review:

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