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1. TESTS MAGIC LANTERN CANON 5D MARK III BENCHMARKS MANUAL
2. TESTS MAGIC LANTERN CANON 5D MARK III BENCHMARKS ISO

The situation with autofocus is compounded by the camera’s apparent insistence that focusing be done at the maximum aperture instead of the currently selected one. Note this scene is deliberately underexposed. Activating the autofocus system while recording video. In my experience, the best option for smoothly dealing with changing conditions is to use a variable ND filter in conjunction with manually set exposure that won’t need to be changed when moving from one environment to the next.

TESTS MAGIC LANTERN CANON 5D MARK III BENCHMARKS ISO

This means you can’t effectively change the ISO manually to compensate for changing conditions.

TESTS MAGIC LANTERN CANON 5D MARK III BENCHMARKS MANUAL

Moreover, in manual exposure mode, changes in ISO, shutter, or aperture all take effect instantly there’s no smooth transition. In some ways, this really limits what you can do with the video features on the 5D mark III. Ultimately, at least in my experience, the best quality video is achieved in manual exposure mode with a manual ISO set. However, Canon didn’t see fit to provide a mechanism to adjust the exposure compensation for auto ISO while in manual exposure mode, making adjusting for darker or lighter scenes impossible, and therefore rendering the feature largely useless. This would be the obvious pairing given the limitations imposed by the normal auto exposure modes. However, the biggest problem with Auto ISO is when you pair it with manual exposure mode-where it would simultaneously be most useful for doing the auto exposure work. Moreover, since the 5D mark III has quite a bit of ISO latitude before noise starts becoming a consideration, there’s a significant amount of range to work with before the video will be strongly negatively impacted. Potentially this could be the most useful method for automatically addressing exposure changes, as it won’t affect the depth of field or motion blur. Auto ISOĪuto ISO is available in all video exposure modes, and it’s the only ISO mode available in the auto exposure modes. Auto exposure tarnsitions over a 2 stop change in scene brightness. Though keep in mind since this transition is achieved by way of changing the ISO, the noise characteristics will change as well. Transitions, at least over reasonably small (4-5 stops) ranges are smooth.

The latter being adjusted only when the exposure change is much larger than auto ISO range will allow. The auto exposure algorithm appears to favor adjusting the ISO over altering the shutter speed or aperture. All auto exposure modes force the camera to operate in auto ISO, since the ISO is smoothly adjusted to allow for smooth transitions in the video. However, I can’t really recommend using any of them in practice. The auto exposure modes are available while shooting video. That said, I’d almost rather Canon have simply disabled autofocus and auto exposure modes instead of giving users the implementations that they did. When it comes to serious users, we’re already talking about manual everything, shutter speed, aperture, ISO, focus, the works. The 5D mark III, like the 5D mark II before it, is clearly targeted at serious users, not mom’s and pop’s looking to shoot video of their kids at soccer practice. I don’t fault Canon for focusing the design on manual control. Simply put, the camera does little to assist you in shooting and where it does provide automation the automation is often hamstrung in frustrating ways.

Shooting video with a 5D mark III is a decidedly cinemaesque shooting experience. Video quality is a hugely complex undertaking to make any kind of serious discussion on, and likely if I went into serious detail including all of the necessary testing, it’s likely that I would more than double the size of this already sizeable review.