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Canon Powershot G7 X III Review - Performance

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Canon Powershot G7 X Mark III Performance

This section is where we look at the image quality performance of the camera. Additional sample photos and product shots are available in the Equipment Database, where you can add your own review, photos and product ratings.


 

Canon PowerShot G7 X Mark III Sample Photos

Sample Photos - Exposure is reliable, with consistently good results, and rarely did we need to use exposure compensation. Colour reproduction is another strong point, with Canon's pleasing colour reproduction, so regardless of which Canon camera you use, your images should have the same look and style, which will make this camera a great choice if you have other Canon cameras. Dynamic range recorded in JPEG in images is good, and there's room to recover shadows if needed, although better restuls are possible by processing the raw files. The Auto Lighting Optimizer (ALO) option helps here, and can be adjusted to give a stronger effect if needed. Shooting portraits with flash, there are no signs of red-eye. 

 

Canon PowerShot G7 X Mark III Lens test images

Lens Performance - Shooting with the wide-angle end of the lens, the image is softer in the far corners, but sharper in the centre. Thankfully this isn't a problem at the telephoto end of the lens.

We didn't notice any vignetting. Distortion is automatically corrected in camera, so barrel and pincushion distortion is minimal. Chromatic aberration and purple fringing is difficult to spot in any of the images we took.

Close up photos, shot using the macro focus option, are occassionally soft, and using a smaller aperture can help sharpen the images. The bokeh or background blur possible when shooting close up is good. Focus is reliable, and face detection works well when switched on, however the camera doesn't have eye-detection focus. The built-in optical image stabilisation helps keep shots sharp and blur free when shooting in low light conditions, or when using more optical zoom. 

 

Canon PowerShot G7 X Mark III Other sample images

 

Canon PowerShot G7 X Mark III ISO test images

ISO Noise Performance - With the same sensor as the G5X II, the results are the same. For the lowest noise and best detail possible we would recommend using ISO125 to ISO800, as images have low levels of noise and good levels of detail. For lower light situations ISO1600 to ISO3200 still provides good results, although noise increases and detail is reduced more noticeably at ISO3200. At ISO6400 / ISO12800 noise levels become strong and we would recommend avoiding this setting if possible, although results may still be useful if resized and used on the web. ISO25600 is best avoided as noise is very high, and detail is low.

 

Canon PowerShot G7 X Mark III White-balance test images

White Balance Performance - Auto White Balance (AWB) gives a warm result under tungsten lighting, with a similar result using the tungsten preset. There is an "AWB Cool" setting that you can toggle on, and this gives much more neutral results (which will be useful for product shots). The camera also gives a warm result under mixed lighting, so you may want to use manual white balance. AWB performs well under fluorescent lighting, with the fluorescent preset giving a magenta colour cast. 

 

Canon Powershot G7X Panoramic IMG 2143 | 1/500 sec | f/5.6 | 8.8 mm | ISO 125
Panoramic | 1/500 sec | f/5.6 | 8.8 mm | ISO 125

Panorama mode - The camera features an automatic panoramic mode (under scene modes), where you simply press (and hold) the shutter release button and pan the camera from one side to the other. Results are good, with a relatively high resolution photo produced (2560pixels high), and stitching is reasonable.

 

Video - The Canon Powershot G7X Mark II (and G7X) was a favourite for bloggers, and knowing this, Canon has been listening to feedback, and updated a number of aspects specifically for video, vloggers, and YouTube. You can also use the touch-screen to start and stop video recording.

The G7X III has been updated to include a microphone socket, plus additional features including support vertical videos (Instagram) and, livestreaming to YouTube (assuming you have over 1000 subscribers on YouTube), via the Canon Image Gateway service online. 

Nb. There are a number of error messages you can get if you haven't enabled live streaming on your YouTube account settings, these include: An error message "Error, Err 127" and "An error has occurred". On a further attempts, the camera may tell you to switch the camera off and on again (Err 70, "An error prevented shooting" - requiring us to remove the battery and put it back in), or there may be a different error message: "Error detected on server, try again later" Err 132. 

4K (30fps (NTSC) or 25fps (PAL) only), FullHD (60/30fps NTSC, 50fps PAL), and HDR (FullHD, 25fps) video recording is possible. There's also a high frame rate option letting you record at 120fps (NTSC), or 100fps (PAL). There is no 24fps frame rate option. You can record 4K timelapse videos. There is also an option to record miniature effect movies, as well as video snapshots. Maximum ISO speed for FullHD video is ISO6400, and ISO3200 for 4K video. 

You can choose difficult picture styles (colour profiles), and customise these with settings for sharpness, contrast, saturation, and colour tone. 

You can use the front lens control wheel while recording, although the clicks will be picked up by the internal microphone, this can be avoided by using an external microphone. Lens noise is quiet, even if you use the zoom while recording.

Video quality is good, with good colour reproduction, reliable exposure, and good focus. Some flare was noticeable in the video, when the sun was in the frame, but as long as you avoid bright light sources, this shouldn't be a problem. Image stabilisation helps keep the video steady and stable, and there are options to enhance the Dynamic IS stabilisation (Low, Standard, High). With the camera set to standard, there was some shake when using the full optical zoom of the camera. You can find additional G7X III videos on the ePHOTOzine YouTube Channel.

 


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