David Heath
February 6th, 2012, 02:37 PM
The C300 only has 3840 pixel horizontally. Hence 80% is 3072. Good lord. Take your shifting goal posts elsewhere please.
If you're going to say I'm shifting goalposts, it's worth checking facts first. The C300 itself only uses 3840 photosites horizontally - but there is a big degree of windowing happening, the chip has far more, 4206 in total. (See http://cinemaeos.usa.canon.com/assets/downloads/Cinema-EOS_Specs.pdf )
Imaging sensor
Effective pixels: 3840x2160 ; Approx 8.29 megapixels
Total pixels:4206x2340 ; Approx 9.84 megapixels
It's usual to have a border of blanked photosites around the edge - but 366 horizontally is a far higher proportion than normal. The belief is that a second camera will follow soon, and to expect 4k. (Oh, OK, expect about 3.2k actual resolution in a 4k wrapper if we have to be precise.) In that case 4206 total makes sense - it's what would be expected if 4096 were actually used.
Similar story vertically. The total number is 2340, and the expectation is that 2304 would be active in 4k mode, as opposed to 2160 as used in the C300.
If you're going to say I'm shifting goalposts, it's worth checking facts first. The C300 itself only uses 3840 photosites horizontally - but there is a big degree of windowing happening, the chip has far more, 4206 in total. (See http://cinemaeos.usa.canon.com/assets/downloads/Cinema-EOS_Specs.pdf )
Imaging sensor
Effective pixels: 3840x2160 ; Approx 8.29 megapixels
Total pixels:4206x2340 ; Approx 9.84 megapixels
It's usual to have a border of blanked photosites around the edge - but 366 horizontally is a far higher proportion than normal. The belief is that a second camera will follow soon, and to expect 4k. (Oh, OK, expect about 3.2k actual resolution in a 4k wrapper if we have to be precise.) In that case 4206 total makes sense - it's what would be expected if 4096 were actually used.
Similar story vertically. The total number is 2340, and the expectation is that 2304 would be active in 4k mode, as opposed to 2160 as used in the C300.