So, in June 2018, canon released this lens. But now, you can get it for as low as GHc 3,000 or as high as GHc 4,500
First of all, I believe, this is the widest lens canon sells for APS-C sensor cameras. On that note, if you’re thinking of getting this lens for your EOS R line of cameras, forget it. Full frame cameras, forget it. APS-C crop sensor cameras with support for only EF lenses, forget it. This is for cameras with EF-S mounts only. You know, that little white square at the lens mount? If your camera doesn’t have that, forget about it. This lens won’t work on it.
If we take a look at the design, it kind of reminds me a lot of the 18-50mm kit lens. If you put them side by side, you may mistake one for the other. The Canon 10-18mm f4.5-5.6 EF-S lens has a filter size of 67mm in diameter. It’s small enough to fit in my hand and weighs in at 240g or 12.3 ounces. For context, here’s how it also stacks up in size compared to the Canon 50mm f1.8 lens.
The lens comes with a circular, 7-blade aperture which is supposed to give some beautifully blurred background; what we call, bokeh. But come on, at f4.5 you pretty much, aren’t getting that much bokeh already. The Canon Optical Image Stabilizer system also provides up to four equivalent stops of shake correction. This is a great thing, but as you can see in this video, the background is a bit wobbly.
One other great thing is that it is an STM lens which most of you can already testify that racking focus on an STM is always smooth, especially in video recording.
The focal length is 10 to 18mm if you don’t already get that in the name, with a 107-degree to 70-degree diagonal angle of view. The closest distance you can get with this while still being able to focus is 0.72ft or 0.22m
For quality, videos are steady and clear enough for outdoor shots. But at its widest length and with the same exact settings, videos are a lot brighter cos the aperture opens up a lot more, from f5.6 to f4.5.
Note that you’ll definitely get some vignetting at the edges of the frame though. This isn’t too much of a problem for photos cos you can typically correct them in Lightroom, Photoshop or whatever photo editing software you’re using, but for videos, that’s a different story.
For photos, you should expect a bit darker image even at its widest aperture. Here’s a shot at 10mm with f4.5, and here’s the same shot with the canon 24mm at f2.8. Without editing, you can clearly see that one is brighter than the other. Note that all these images are JPEGs straight from the camera, which means, that if you have a camera with a good enough dynamic range, you can retrieve a lot in post-production.
Here’s how the video quality looks at 10mm, then 12mm, then 14mm, at 16mm and at 18mm.
But if you’re among the small number of people who don’t need this wide of a lens, you can check out the 24mm f2.8 STM lens instead. It’s wide enough for group shots and even YouTube videos. Actually, that was what I was using and sometimes use for my sit-down shots.