![]() The importance to me is that the reduction in effective resolution is a significant issue for both the lower end Panasonics, but even worse for the Yi-M1. All the issues for that degree of sensor cropping apply equally in this situation as the do for using APS-C cropping modes on full frame cameras such as the various Canons, Nikons and Sonys. The Yi-M1 based on a 20MP sensor with X dimension of about 5184 sensors (based on the 5184 x 3888 20MP image format) and crops it to 3840 for 4K for a lens equivalence ratio of about 1.4X which is close to the same reduction from a full size APS sensor down to APS-C (which is roughly 1.5X). In the X dimension this is a crop from about 4592 sensors (the DC-GX850 16 GB largest still picture format is 4592 x 3448) down to 3840 pixels for 4K video for a lens equivalence ratio of about 1.2X (compared to the full Micro 4:3 sensor usage). The Panasonics start with a 16M sensor and crop that down to the 3840 x 2160 "4K" video format. The Yi-M1 is not the only camera cropping the sensor during 4K video recording, but the amount of cropping is more than the other Micro 4:3 cameras ("budget" Panasonics). "Full HD" video now supports stabilization. So while the processor is probably being heavily utilized, it does not seem to be pushed as hard as some other early or low end 4K video cameras (such as the Panasonic GX850 and the Sony a6300). But not only has this problem been addressed without reducing the framerate, but I did not notice the camera body becoming unusually hot. When the first reports came out about the exposure "flashing" when the zoom was used, I thought that it could be a problem of the processor being over-used, and that it might be best to reduce the frame rate from 30 fps down to 24 fps. I have no current easy way to test whether it still forces the aperture fully open, but I do not think so. Apparently this was partly the fault of the metering forcing the aperture fully open. If I had tested the 1.0.20 firmware I could say for certain how much difference having this new icon with is new set of controls changes the usability of the camera, but it seems likely to me that it is a substantial improvement for users.Īnother change that I know has occurred is that zooming during 4K video does not seem to cause exposure errors as it did in the past. This adds a second level of quick adjustments to the three dedicated screen buttons on the left which force control of "F-Stop", "Shutter Speed" or "Exposure Compensation" and the "Quick" hardware button on the bottom right outside the screen and the rotary Mode control on the top deck. It can redefine the wheel to adjust "Focus Mode", "ISO", "White Balance", "Metering Mode", "File Format" (RAW or JPEG) or "Drive Mode". The 2.0 firmware has a new icon on the right side of the screen which opens a menu for selecting the function of the far right "wheel" control. It would be nice if they re-tested it with newer firmware, in particular the auto-focus speed and image quality might have improved. This review has the most useful lens analysis Apparently the lenses are both quite good optically. The firmware is not identified, but I suspect that it was at best 1.0.20 International, and possibly earlier. "Reviews/Consumer Electronics/Digital Cameras/YI M1" I also noticed that his camera was made in China. Apparently his camera is having "locking up" problems. While Tomkins does not state outright which the last firmware he used was, it was clearly the version "2.0 International" (he mentions "mid-April"). Last update "07/31/17: Field Test Part II" "YI M1 Review", "Camera Reviews / YI Cameras" There is no indication of an update, so it is best to read this as "historical". ![]() I will only report specific issues that I am interested in or specific problems I run into.Īccording to the publishing date this review was written before version "1.0.20 International" which was the first reasonably stable firmware. I will not be attempting anything like a "full review" of this camera. Actually, since I had not heard of a problem with storage up till now, I think testing "1.0.20" would probably have been safe enough, but I went ahead with the upgrade. Originally I intended to use it with that firmware first and then upgrade to the April version "2.0 International" firmware, but I saw that one of the upgrades was for SD-Card compatibility and I felt that I wanted the safest firmware available for storage since a trashed card could mean losing a day's efforts. ![]() I received it with the "1.0.20 International" firmware. I have been using a Yi-M1 since around the second week of August 2017.
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