Canon C300 Mark III: ISO Efficiency and Publicity Restoration Check

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For digital cinema cameras, the Canon EOS C300 Mark III is without doubt one of the finest to come back out in current instances. It has a well-recognized type issue and solely improves on the dependable and much-loved C300 sequence. This time there’s a brand-new Twin Acquire Output (DGO) sensor that goals to enhance picture high quality in quite a few methods.
Specific areas to take a look at are ISO efficiency and publicity restoration. Dom from LensProToGo went hands-on with the C300 Mark III and did these actual exams. He additionally examined utilizing each Canon Log 3 and the uncooked format to see if there are any variations in efficiency.

On the entrance of the C300 Mark III is the ZEISS Otus 55mm f/1.4 ZE Lens. It’s normally set to ~f/8 with adjustments to ISO and shutter pace as the principle change. For restoration, the aperture is adjusted extra. 
For Canon Log 3 the preliminary ISO exams are recorded in XF-AVC 10-bit 4:2:2 and the grading is actually only a Rec.709 conversion. Beginning at ISO 160 you might be seeing good imagery. Even ISO 320 is sort of good and solely at ISO 640 might you begin discovering something. At 800 there may be one other small soar in noise although nonetheless very, superb.
Shifting as much as ISO 2000 you may see a extra broad addition of noise, although it takes till ISO 2500 to get to a “noticeable” level. Nonetheless very usable. At ISO 5000 it’s there, however practical and certain the tip of the road for most individuals.
ISO 8000 you might be beginning to see extra points with issues like distinction, along with simply having extra noise. ISO 10,000 is getting worse and 12,800 is dangerous. It’s simply increasingly more till the tip at ISO 25,600.
In comparison with the predecessor, this can be a enormous enchancment. In an absolute pinch, these high ISOs are nonetheless accessible whereas earlier than there was much more coloration shift and distinction points.
Picture Credit score: Canon
Moving into uncooked you begin out at ISO 800 the place it’s tremendous clear. Identical deal for ISO 1600 and a tiny little bit of noise at ISO 3200. At ISO 6400 it appears to line up with ISO 2500 in Canon Log – nonetheless pleasing, however it’s there. ISO 12,800 exhibits some points with coloration shift and clearly much more noise. Once more, it simply will get worse from right here and there appears to be a bit extra magenta shift getting as much as ISO 25,600.
Up subsequent are the over/underexposure exams. It’ll once more be performed in XF-AVC with Canon Log 3 and in uncooked.
Going with XF-AVC first, one and two stops over should not a problem for correction—although there’s a slight coloration shift at 2 and over. Three stops is doable, however it’s undoubtedly on the line and desires some work. 4 stops over is the place you might be beginning to doubtlessly lose info and 5 stops is completely a problem.
Underexposure is okay for one cease below, however two stops right here turned a problem for grading. You’ll begin seeing noise and dropping info. Three stops below confirmed critical coloration shifts. 4 stops is only a ton of noise and 5 stops just isn’t very usable in any respect.
Picture Credit score: Canon
Uncooked ought to convey some enhancements right here. For overexposure, it was capable of be pushed all the best way as much as three stops with out dropping a lot of something. 4 stops are spectacular and completely usable. It isn’t till 5 stops the place you see some slight clipping.
For underexposure, you’ll begin seeing noise rapidly. One and two stops are superb, however noise is exhibiting up. Three stops is attending to the road of usability on account of noise, but it surely isn’t dropping an excessive amount of info. 4 and 5 stops are problematic.
The C300 Mark III’s DGO sensor is a large enchancment over its predecessor. Plus, uncooked video presents very seen benefits for moments while you aren’t in full management over the scene.
How did you suppose the C300 held as much as these exams?
[source: LensProToGo]
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Canon EOS C300 Mark III Cinema Digicam (B&H)

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