Review on Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras by Li Kai ᠌

Name: Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras
Item: Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras
Rating: 5

September 13, 2022

The best product, from those that I have viewed, I advise everyone!

A cool affordable and interesting lens.
The only thing, I didn’t understand it on the crop, is that the equivalent focal length of 64 mm is too large for a standard (“normal”) lens, but not enough for a portrait lens, and the aperture is not enough for a beautiful blur (bokeh). A good zoom, especially a fast one, as a standard lens is a great alternative.
At full frame, I really liked the lens as a light, inconspicuous staff lens for non-portrait photography of people (events, premises, genre, friendly meetings, group shooting, etc.), it is also good due to the greater depth of field for landscapes relative to fifty dollars. An excellent pair to the classic fifty dollars, which works on bokeh.
With regards to focus jamming after pressing on the retractable part of the lens, the problem is solved at the software level. Lenses with a serial number with a third digit of 3 or more are already devoid of this glitch, for those with a third digit of 0.1 and 2, you can reflash the lens in the service or with the latest cameras that came out simultaneously with the lens or later (Canon 650D, 700D, 70D , 5D mark III, 6D). And you can not reflash while it works.
I recommend buying a full-frame camera for photography.

Pros

1. Very high optical characteristics - no aberrations are noticeable, sharp from f / 2.8, resistant to hares, high contrast, distortion is not visible. 2. Very compact lens. You can carry all the time on the camera instead of the cover. :) People pay less attention to you. 3. A very attractive price - for 5,000 a great option. 4. Good body, steel bayonet. 5. Autofocus is quite acceptable in terms of speed. 6. Round diaphragm does not make nuts. 7. The electronic drive of the manual focus ring (it has no mechanical connection with the lens unit and only controls the STM drive) allows you to manually adjust the autofocus during the entire time the electronic drive (FTM) is running - that is, with the slider set to AF, you can manually tighten the focus when half-pressed shutter release button (as long as the STM drive is activated).

Cons

1. Not too high aperture - f / 2.8 is noticeably not enough for pampering with bokeh, especially at such a short focal length. 2. Bokeh is harsh relative to fifty dollars on the same apertures. Relative to the Olympus OM 40/2.0, the bokeh is also harsh on similar apertures. Bokeh is pockmarked, slightly rattling. 3. Autofocus is not as fast as USM, and most importantly - it makes a sound. Not buzzing, of course, like conventional micromotors, but not completely silent either. 4. Focusing exclusively through STM. The manual focus ring is electronic and only controls the focus motor. So you should forget about silent video recording even with manual focus.