Be Careful with Sigma 50/2.8 Macro

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Dr. Harout
Tower of Babel
Posts: 5833
Joined: Wed May 30, 2007 7:38 pm
Location: Yerevan, Armenia

Be Careful with Sigma 50/2.8 Macro

Unread postby Dr. Harout » Fri Dec 21, 2007 6:34 am

Unexpectedly, the focus limiter knob on my Sigma 50/2.8 Macro EX DG refused to go back to "full", thus forcing me to take pictures from a distance and then to crop. In fact I used that knob just once!
So, having no repairer here, and with no possibility to send outside, decided to try to fix it myself. Don't tell me to mind my own business or not to get in fields I have no idea of.
The truth is, my father was a camera/lens repairer (professional), and being a kid, I used to look how he handled things.
The beginning was long till I realized how was the construction (and believe me it's not what we think it is from the inside).
I dismantled almost everything till I reached that ***** screw which wouldn't come out (the last screw, after which I would've fixed that *** limiter knob). Ok, that screw was stuck and the perforation (or whatever it is called, where you fix the screwdriver...) was defective (hiccup!hiccup!)...
So carefully I isolated it from the surrounding so that it doesn't hold the ring to the adjacent structure. I managed it. And it was just then, when I was happy that I did it, the tip of the screwdriver thorned the electric wires and cut it... :oops:
All in vain...
So what do we learn from this? Never dismantle a Sigma lens? NO! NEVER PLAY/USE THE LIMITER KNOB. From the inside: it's not a reliable construction! And that's probably why Sigma lenses are cheaper.
I've learned my lesson. My next Macro will be Sony (don't cheer up Sony, you have too many mistakes that you should fix too. But that's another story).

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Joined: Thu Dec 06, 2007 4:13 pm

Unread postby Margie28 » Fri Dec 21, 2007 2:00 pm

Hi Dr Harrout,

I'm so sorry for that bad experience you had with the Sigma lens!

Thank you for the warning, because I haven't used it a lot yet, but I certainly won't press that knob, for what you told in the earlier mesage!

Sony lenses are so expensive. Can we find compatible lenses in the Tamron lenses?

I hope there is, because I have read great reviews about the Tamron lenses

Sony Alpha 100, Sony lens 18-70mm, F3.5-5.6, Sigma lens 70-300DG MacroSigma 50 mm Macro

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