ml sd card overclocking on digi5 camera

[zlfan]

some cards like lexar silver can do 100 MB/s, stably at 80 MB/s, this is better than cf card. this makes 650d/700/deosm/100d better than r1mx in terms of data stream writing speed. 

5d3 ml has 145 mMB/s, about the same as epic-x, maybe a little less, not much. 

so 14 bit color depth is more possible with many modes.

also, 200d may have a 15-bit mode, the highest in all video camera, including alexa. 

 

[zlfan]

with global draw off, 5d3 ml can do uhd 2.40:1 24p 10 bit color depth lj92 lossless ml raw continuously, 8 MB / frame x 24 frames / s x 0.7 (lj92 lossless compression least compression coefficiency) = 140 MB/s < 145 MB/s. maybe 12 bit too in some cases. 

[zlfan]

5d3 ml in 1x1 uhd mode can only have 2:40:1 and larger aspect ratio, so each frame is 6 MB, so 6 x 24 x 0.7 = 100 MB/s. for 12 bit, 6x24x0.7x1.2= 120 MB/s, for 14 bit, 6x24x0.7x1.4=140 MB/s. so UHD 1x1 24p 2.40:1 14 bit lj92 lossless may be continuous if using fast cards, card spanning, sd card overclocking. 

so 5d3ml is still relevant. and it is 4k 14 bit, crop ratio 1.3 to 1.4 in uhd  1x1 mode. 

[zlfan]

dual iso is possible in this uhd 1x1 mode on 5d3 ml, can increase 2-3 stops, at the expense of possible moire and alias in the highlight area. i watched uhd 1x1 dual iso travel footage, i did not see the moire and alias,, or they were not eye catching. the practical problem is the striped monitoring when using dual iso. 

[zlfan]

another useful mode on 5d3ml is 3.5k 1x1 mode, it can do 16:9, most importantly, it is s35 so that many cinema lenses are adaptable to this mode. 7MBx24x1.4x0.7 ia sbout 170 MB/s, so if do 10 bit, 3.5k 1x1 16:9 is continuous, maybe 12 bit will work. 

[zlfan]

for 700d/650d/eosm/100d, 5.2k 1x3 2.40:1 24p is about 3.75 MB/frame x 24 frame/s x 1.4 x 0.7 = 90 MB/s, with the lexar silver card, this mode may be continuous. this is s35 full frame for these crop mood cameras, the live view is high res color mode even in crop modes, practically very useful. 

[zlfan]

5.2k 1x3 is about 3k 1x1 to my eyes. 

[Andrew - EOSHD]

Dear @zlfan

These posts are like spam.

So I am going to put your account on pause while I look into whether you're a bot.

Too many incidences of low quality posting recently and I have to make an editorial decision to protect the place, ok?