Samsung NX lens mount : Metal or plastic ?
First of all, I would like to apologize for any typo or grammatical errors in this article : english is not my mother tongue...
Users of Samsung NX lenses have noticed that there are two types of rear lens mount : the black one, made of plastic, and the chrome-plated one. But is the shining one made of metal ALWAYS ? Could there be a third type ?
I bought a second-hand 16mm F2.4 prime lens sometimes ago. But rather quickly, the autofocus mecanism became noisy. I decided to take the lens apart to find why. After having removed the rear mount, I found it so light in my hand that I was suspicous about what it is made of. So I took apart the rear mount of my 18-55mm lens, which is obviously black plastic, and the rear mount of my 50-200mm, a chrome-plated one. Then I weighted them on a precision scales. Here are the results :
- 18-55mm plastic mount : 4,14 g
- 50-200mm chrome-plated mount : 26.43 g
- 16mm chrome-plated mount : 8.98 g !!!!
Moreover, I noticed that the two screws that attach the semi-circular plate holding the electrical contacts to the rear mount are of different types : the screws of the 50-200mm lens are threaded to fit metal. The screws of the 16mm lens are threaded to fit... plastic !
I could have drilled a small hole into the back side of the mount to check the type of the material under the chrome surface. But I respect my gear and do not want to do any harm to it... I am sure many of you can understand that...
Anyway, I think I have gathered enough proofs to say : the rear mount of my Samsung NX 16mm lens is made of plastic plated with chrome !
But the most puzzling part of this, is that I have not found, so far, either in the Samsung lens documentation (brochures, user manuals, press releases, etc...) or on web sites dedicated to photographic gear that do reviews and tests (like this one...), any mention of this "pseudo metallic" chrome-plated rear mount.
I think Samsung managed to fool its customers (and the reviewers too) pretty well... until now !
Where is the sheep (cheap...) in wolf's (chrome) clothing ?
Note : baïonnette is the french word for bayonet.
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