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Aperture Sound - Sigma 17-50mm

Anonymous Thu 04 May 2017 19:20:00 No.3069676 View View Reply Original Report

Quoted By: >>3069681 >>3069686 >>3069739 >>3069770

Just bought a Sigma 17-50mm f2.8, and when changing the aperture, the blades closing or opening produce sound.

The AF is also very loud in live-view.

Is this normal?

Anonymous

Anonymous Thu 04 May 2017 19:28:14 No.3069681 Report

Quoted By:

>>3069676
No, it's not normal. It probably has fungus.

Anonymous

Anonymous Thu 04 May 2017 19:38:08 No.3069686 Report

Quoted By: >>3069698 >>3069702 >>3069739

>>3069676
The aperture blades might be warped, could happen when closed down and exposed to sunlight for some time. If you screww off the front element the whole optics come out and you can take a better look at the aperture blades and bend them back with your fingers. Just screw the optics back and you're good to go.

Anonymous

Anonymous Thu 04 May 2017 20:08:47 No.3069698 Report

Quoted By: >>3069702

>>3069686
This
/thread

Anonymous

Anonymous Thu 04 May 2017 20:19:13 No.3069702 Report

Quoted By:

>>3069686
>>3069698
OP here, thanks for the memes.

Anonymous

View Same Google ImgOps iqdb SauceNAO Cameracleaning.gif, 1MiB, 490x154

Anonymous Thu 04 May 2017 21:36:43 No.3069739 Report

Quoted By:

>>3069686
>>3069676
Make sure to clean the camera and lens before you open the lens up.

Anonymous

Anonymous Thu 04 May 2017 22:26:39 No.3069765 Report

Quoted By:

mods please delete this thread

Anonymous

Anonymous Thu 04 May 2017 22:33:59 No.3069770 Report

Quoted By:

>>3069676
>Is this normal?
Screw driven AF is loud (and fast!), old motorized AF for EF is probably loud too.

How loud is the aperture sound? Definitely audible with my 17-70 C, never had a problem. Can't remember if 17-70 aperture sound was any louder, it probably was not.

Anonymous

Anonymous Fri 05 May 2017 18:40:26 No.3070243 Report

Quoted By: >>3070370

Aperture sound depends on the mount. EF's apertures are objective-driven, Pentax' and Nikon's (and Sony's?) are body-driven.

Anonymous

Anonymous Fri 05 May 2017 23:11:37 No.3070370 Report

Quoted By: >>3070386

>>3070243
It's Canon.

Anonymous

Anonymous Fri 05 May 2017 23:45:27 No.3070386 Report

Quoted By:

>>3070370
Clicking of EF aperture is quieter because there are less movnig parts (no coupling) but it still can be audible.

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