Einleitung
I have already sent my Sigma lens for the replacement of the focus ring before. So when the new ring broke after 1 more year of usage I decided not to waste money any more and to try to fix it by myself.
Was du brauchst
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Put the lens on the table the way you can access the buttom screws.
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Unscrew the black screws near the contact plate and from the black inner ring (which stands between the optical lens and the top outer ring).
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Remove the top outer ring.
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Remove the little shaft with the focus gear and the multiple rings that hols the shaft.
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Unscrew the screws that hold the top plastic ring (which is part of the lens body) and remove it.
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Unscrew the screws that hols microchip plate.
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Unscrew the screws that attach lens outer body part to the inner optical part.
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Now you should be extra aware and do the next operation very carefully!
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Remove the inner optical part from the outer body part of the lens.
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Try to memorize the way the parts were inserted one into another (when assembilng the lens I have lost a lot of time figuring out how the optical part should be fitted into the outer body part).
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Put the optical part away very carefully without putting it upside down.
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DO NOT TRY TO DISASSAMBLE THE OPTICAL PART.
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Unscrew the screw which were hiding under the zoom ring (see right part of this picture).
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Remove the top part from the fosing ring (focusing ring is on the left part of this image).
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Now you can clearly see the reason of the problem.
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If tou are not sure you can accomplish the further repair steps you order a replacement focus ring and reassemble the lens in the reverse order.
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Take the stapple block and detach some stapples from it (I actually used 2 of them)
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Cut one stapple leg away from the stapples.
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Use a dremmel tool to remove the broken cog (I have removed 2 of them).
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Use a small flathead screwdriver to make 2 small grooves on the flat surface of a ring right behind the removed cogs have been placed.
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Use a soldering iron to solder the previously prapared stapples into the focus ring.
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Put some super glue over the soldered stapples.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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6 Kommentare
I dismounted the lens to make the repair and unintentionally I DISASSAMBLE THE OPTICAL PART and now I can not ride back. chaos
Video da sökme ve takma kısımları var.
I am very thankful to You, as just repaired my Sigma by this method.
Thank You very much!
I have a Sigma DG 70-300 zoom. Problem: zoom part comes all the way out and will not go back in and lock in place . Can it be fixed? John polley