Введение

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.

Put the lens on the table the way you can access the buttom screws.
  • Put the lens on the table the way you can access the buttom screws.

  • 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).

Добавить комментарий

Remove the inner ring.
  • Remove the inner ring.

  • Unscrew the screw from the top outer ring.

Добавить комментарий

Remove the top outer ring. Remove the little shaft with the focus gear and the multiple rings that hols the shaft.
  • Remove the top outer ring.

  • Remove the little shaft with the focus gear and the multiple rings that hols the shaft.

Добавить комментарий

Unscrew the screws that hold the top plastic ring (which is part of the lens body) and remove it.
  • Unscrew the screws that hold the top plastic ring (which is part of the lens body) and remove it.

  • Unscrew the screws that hols microchip plate.

  • Unscrew the screws that attach lens outer body part to the inner optical part.

Добавить комментарий

Now you should be extra aware and do the next operation very carefully!
  • Now you should be extra aware and do the next operation very carefully!

  • Remove the inner optical part from the outer body part of the lens.

  • 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).

  • Put the optical part away very carefully without putting it upside down.

  • DO NOT TRY TO DISASSAMBLE THE OPTICAL PART.

At this point you need to loosen/ of remove the screw that allows the zoom ring to turn so the lug seen on the ring meets the slot allowing it to be removed

Daniel Wright - Ответить

Remove the zoom ring.
  • Remove the zoom ring.

Добавить комментарий

Unscrew the screw which were hiding under the zoom ring (see right part of this picture).
  • Unscrew the screw which were hiding under the zoom ring (see right part of this picture).

  • Remove the top part from the fosing ring (focusing ring is on the left part of this image).

Добавить комментарий

Now you can clearly see the reason of the problem. 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.
  • Now you can clearly see the reason of the problem.

  • 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.

Добавить комментарий

Take the stapple block and detach some stapples from it (I actually used 2 of them) Cut one stapple leg away from the stapples.
  • Take the stapple block and detach some stapples from it (I actually used 2 of them)

  • Cut one stapple leg away from the stapples.

Добавить комментарий

Use a dremmel tool to remove the broken cog (I have removed 2 of them).
  • Use a dremmel tool to remove the broken cog (I have removed 2 of them).

  • 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.

Добавить комментарий

Use a soldering iron to solder the previously prapared stapples into the focus ring. Put some super glue over the soldered stapples.
  • Use a soldering iron to solder the previously prapared stapples into the focus ring.

  • Put some super glue over the soldered stapples.

Добавить комментарий

Заключение

To reassemble your device, follow these instructions in reverse order.

6 участников успешно повторили данное руководство.

Pavel

Участник с: 03.07.2014

288 Репутация

1 Guide authored

Комментариев: 4

I dismounted the lens to make the repair and unintentionally I DISASSAMBLE THE OPTICAL PART and now I can not ride back. chaos

Ricardo Morais - Ответить

Thank you so much for posting this.

It helped me to fix my focus ring. In my case the teeth on the ring were not damaged, but a small piece of some broken plastic was blocking the ring from moving smoothly.

Thanks!

Shlomsi - Ответить

I am very thankful to You, as just repaired my Sigma by this method.

Thank You very much!

egidijus1972 - Ответить

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

John Polley - Ответить

Добавить комментарий

Просмотр статистики:

За 24 часа: 10

За 7 дней: 83

За 30 дней: 267

За всё время: 9,237