Be careful with exchangeable camera mount of new Sigma lenses

Sigma 35 mm F1.4 DG HSM has an exchangeable mount and can be adopted this way for any of supported camera systems — Canon, Nikon, Sony, Sigma. This means that if you some day decide to switch to a different camera brand, you can send your Sigma lens to the nearest service, and they will change the mount. The mount is attached to lens body with a metal ring that looks like a cup (see the picture below). There are no visible screws outside, therefore I think that it is fixated somehow before the mount ring is attached. Potentially this part may cause problems. I learned this after some time in the field — during a 43 days long expedition to Pamir and Alai. At certain moment, I noticed that the mount has a play, i.e. the lens moves a little when it is attached to camera. I thought first that the mount lock in the camera was the cause: I had observed already with some other lenses before that one lens attaches to the camera not so tight as the other. But this time it was different — the lens was moving much more. Finally I discovered that it was not the lens-to-camera attachement that wasn’t firm but the attachement of the mount to the lens was loosened so much that I finally had to bind it with an adhesive tape to prevent it from falling off. When I returned home, I sent the lens to Sigma service that fixed it on the same day for free because the lens was still on warranty. I am sure that the reason why the lens was broken wasn’t its quality but my too harsh treatment of it regardless its specific construction. Sigma 35 mm F1.4 DG HSM is an “Art” series lens: It is neither weather sealed nor rugged, and nature photography isn’t primary use area it is intended for. Certainly, it isn’t as sturdy as the Canon and Zeiss counterparts and has to be treated accordingly.

What's in the package: Sigma 35 mm F1.4 DG HSM, hood, pouch

Sigma 35 mm F1.4 DG HSM: lens, hood, pouch

About Arthur Tiutenko
Nature Photographer and Illustrator

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