Photo-parts

The Canon 50mm f/1.4 is arguably the most popular - and probably the most failure-prone - lens in photo history. Yes, popularity amplifies the number of complaints, but objectively, there are genuine issues. Early batches were sensitive to even minor impacts — the helicoid ring would deform, and both manual and autofocus would fail. Over time, the planetary gear system would wear out, causing annoying rattle during manual and auto focusing. The motor used has a limited lifespan and fails

Among Sony E-mount lenses, the G Master and Zeiss (ZA) series stand out in particular. The G series is supposed to deliver mind-blowing image quality, fast autofocus, and record-breaking aperture speed, while the ZA line, in turn, focuses on artistic rendering (allegedly) - and fair enough, Carl Zeiss engineers did lend a hand in designing the optics! I'll leave this kind of classification to the marketing department, but from my own experience, there's nothing alien about Zeiss-branded lenses.

A very typical failure of a very good lens – the Sony FE 90mm F2.8 G OSS: it’s no longer detected by the camera after a fall. This lens uses Sony’s proprietary focusing technology – Direct Drive Super Sonic Motor (aka DDSSM) – but with a twist: there are two such motors inside. Essentially, this motor type is an ultrasonic linear actuator, first introduced in exactly this form back in the Minolta/Sony A100, where it was used to move the sensor. The lens is moved along a straight shaft

Sigma 19mm F2.8 E aperture repair (video) byu/Vuvuvtetehe inElectronicsRepair

I have a soft spot for the Sigma DN Art lenses. They offer great image quality, come in three versatile focal lengths (19mm, 30mm, and 60mm), and are incredibly compact. In a pancake-sized design, Sigma engineers have packed a very capable lens with excellent sharpness and pleasant rendering. I also love this series for its very common, almost charmingly typical issues. These flaws show up just slightly less often than always - and are generally very easy to fix. This time, the 19mm version