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05-10-2019, 05:55 PM   #1
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Sigma 70-300mm Super Macro lens stuck switch

Has a stuck switch. Some times, I can get it to move off the macro and back to normal so I can pull the barrel down and get to 70 mm. Yesterday it wouldn't budge. A couple days ago I cleaned it with some quick dry electronic cleaner. Then used a Q-Tip and alcohol. That seemed to work for a day or two. Now it's back to being stuck again. Any idea on how to clean the switch so it doesn't stick again?

05-10-2019, 06:56 PM   #2
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I've had this happen, too. The frustrating problem is that the macro switch won't budge unless the focus ring is turned far enough to get the lens out of the macro range.

And given the lack of quick-shift, that means either: 1) quickly AFing on something distant; 2) flipping to MF on the camera, twisting the focus ring toward ∞, flipping back to AF; or 3) slowly brute-forcing the focus ring.
05-10-2019, 07:10 PM   #3
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I am sorry I misread your statement.

Thanks I'll give your suggestions a try.

Last edited by photolady95; 05-10-2019 at 09:09 PM.
05-11-2019, 04:36 AM - 1 Like   #4
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Thanks photooptimist, it was the focusing ring wasn't turned far enough. After I did that, the switch moved to normal. Whew! I thought my switch was broken. You saved my lens.

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