What is the tethering range for the WiFi signal? I'm interested in the feature but it would be useful to know it works reliably over at least 20 meters (line of sight).
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well, what I am really missing is the possibility of a quick change between a single-shot and fast multi-shot.
The reviewer of the digital picture, used the 5DIII for sports with 300 2.8 and 400 2.8 lenses and says that the focus hit rate was impressive. This guy has good experience with the 1 series cameras so I am sure he knows what he is talking about.
Lens drive speed: Because of its higher voltage battery, the 1D Mark IV can supply an initial burst of power to select L-series USM telephoto lenses (limited to EF super telephotos) that drives them twice as fast as normal for the first second of operation. The 5D Mark III can't do that because its battery is lower voltage, and also because the camera body is not designed to accept higher voltage even if it was available.
When expressing chroma subsampling ratios the 4:2:2 doesn't refer to primary colours as G:R:B, it's Y:Cb:Cr which refers to Luminance (Y) and two colour difference components Blue Difference (Cb) and Red difference (Cr)
I think that they are one in the same (G:R:B and Y:Cb:Cr) in this application, but I'm not certain.
The subsampling scheme is commonly expressed as a three part ratio J:a:b
J: horizontal sampling reference (width of the conceptual region). Usually, 4.
a: number of chrominance samples (Cr, Cb) in the first row of J pixels.
b: number of (additional) chrominance samples (Cr, Cb) in the second row of J pixels.
That pancake lens announcement is really good news. May mean that the 600mm f4.0 Pancake prototype may finally see the light of day:
According to the review and the ISO charts on TDP, the 1.4III see very limited IQ loss when mated with the 70-200 f/2.8 IS II vs. the 70-300L
I don't know Pix, the 70-300 looks pretty significantly sharper to me.
smirkypants- you are right
I agree, the 70-300 is at it's sharpest at 300 f/5.6.
The ONLY real difference in these lenses is the focusing mechanism and manual iris. That's it.