7D # 2 no frio do Inverno
Canon 7D in cold weather. Video filmed on Canon 5D Mark II. NB: View it in full screen mode!!
TYPE OF TEST: CFR-2 (What does this mean?)
I´ve had many questions regarding the Canon 7D’s operation in cold temperatures. Last Friday was the perfect opportunity to test the camera for 3 hours in -23 °C temperatures. I dressed warmly and prior to testing I put the 7D and its batteries out in the cold for about 1 hour. This isn’t the smartest thing to do as I always recommend removing the batteries and keeping them warm when the camera is not in use. For this test I wanted to cool down the camera and batteries.
I have some favorite shooting places close to my office and I took along my dog “Chilli”. I wanted to test how well the 7D AF-system works in the cold. My question: Is the 7D a great action camera when the weather is really cold?
AF tracking
As you can see from the images in the above video, the 7D AF follows the running dog very precisely. The situation of a light dog, surrounded by white snow and the sun as back lighting, is a challenging situation for the AF. I think the camera did a great job following the dog. A few times the AF lost track of the dog, but it was fast getting focus back and following the target dog as it approached me. The camera´s fast tracking ability was not hampered by the cold temperatures. I also tried the Canon 1DS Mark III with the same setup, and it was not faster than the 7D (1.6 crop factor) even if it is a full frame camera. The situation in sub-zero temperatures and difficult tracking situations impressed me.

Canon 7D with 70-200/2.8L IS and 1/2000 sec at f/6.3 and ISO 400. No cropping.

Canon 7D with 70-200/2.8L IS and 1/2000 sec at f/6.3 and ISO 400. 100% view.

Canon 7D with 300/2.8L IS and 1/1000 sec at f/5,0 and ISO 400. Distance: 7,37 m. No cropping
Frame rate
The Canon 7D shoots very fast in cold weather. During this test I was shooting up to 8 fps for a total of 32 images in 5 second. This is very effective when shooting fast moving subjects.
It’s very important to use the correct settings to use the high frame rates. First of all you have to select drive mode “high”, not low or single. This can be confusing since the Canon 5D Mark II has a symbol for high frame rate, that is the same as the low frame rate symbol on the Canon 7D. The symbol for the low frame rate in 1D / 1DS Mark III is marked with «L» which makes it very clear. When I´m out in the field I usually use all the 1DS Mark III, 5D Mark II and 7D, and in the heat of the moment it can be very confusing with different symbols for drive modes on each camera. This was the case during my first field test in the cold, when I didn’t get 8 fps, because it was set to low drive mode.
Secondly, you must deactivate noise reduction on high ISO. Even with a setting of ISO 400 you can only shoot 8 frames before the buffer needs a break.
Conclusion
The Canon 7D has absolutely no problems in cold conditions and works as expected. The batteries are really very good, and you can shoot for hours in cold winter weather without recharging the batteries.
Fonte: canonfieldreviews.com
Tags: Camera, Canon, Canon 7D, fotográfia, friu, inverno
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Depois de alguns dos mais básicos rumores, a Canon anunciou ontem, 1 de setembro/2009, o lançamento da EOS 7D.
Por falar em viewfinder, 100% de cobertura é outra coisa que sempre foi solicitado pelos fotógrafos. Raríssimas câmeras conseguem entregar isso, o que é perfeito, pois você vê exatamente o que sairá na foto. É controle total.

