Home · Register · Search · View Winners · Software · Hosting · Software · Join Upload & Sell

Moderated by: Fred Miranda
Username   Password

  New fredmiranda.com Mobile Site
  New Feature: SMS Notification alert
  New Feature: Buy & Sell Watchlist
  

FM Forums | Alternative Gear & Lenses | Join Upload & Sell

  

Archive 2012 · sigma 30 E mount problem/question
  
 
kevindar
Offline
• • • •
Upload & Sell: Off
p.1 #1 · sigma 30 E mount problem/question


Just picked up a sigma 30. here is my question. when the lens is not mounted, or the lens is mounted with camera off, the aperture is closed, and as I tilt the lens, it makes a clicking sound like things are shifting inside, and I can actually feel thing tilting inside. when the lens is mounted and the aperture opens, the lens no longer makes the sound. Is this normal? has anyone else experience this? if the camera is on, and the aperture is closed down to f22, it still does not make any noise.
can someone who owns this lens test this and see if its normal? thanks.



Aug 07, 2012 at 05:03 AM
FlyPenFly
Offline
• • • • •
Upload & Sell: On
p.1 #2 · sigma 30 E mount problem/question


Well known characteristic of this lens.

Also, do not try to use AF in video mode with this lens.



Aug 07, 2012 at 05:05 AM
kevindar
Offline
• • • •
Upload & Sell: Off
p.1 #3 · sigma 30 E mount problem/question


. thanks. where does one go to find out about these "well known characteristics"? what happens trying to autofocus during video?


Aug 07, 2012 at 05:06 AM
tomrock
Offline
• • •
Upload & Sell: On
p.1 #4 · sigma 30 E mount problem/question


The manual that comes with the lens mentions the sound.

Sorry, I don't shoot video so I can't help there.



Aug 07, 2012 at 11:26 AM
 

Search in Used Dept. 



Tariq Gibran
Online
• • • • • •
Upload & Sell: On
p.1 #5 · sigma 30 E mount problem/question


kevindar wrote:
. thanks. where does one go to find out about these "well known characteristics"? what happens trying to autofocus during video?


The two Sigma's I had, 30mm and 19mm, would both hunt and hun, seldom locking onto focus, when used in AF mode for Video on the NEX-7. I think most folks use those lenses in MF for video.



Aug 07, 2012 at 07:38 PM
aferiksson
Offline
• •
Upload & Sell: Off
p.1 #6 · sigma 30 E mount problem/question


tomrock wrote:
The manual that comes with the lens mentions the sound.

Sorry, I don't shoot video so I can't help there.


Wow! There are obviously people that read the lens manuals

I've noticed the sound from both the 19 and 30 mm, but never even considered reading the manual ...



Aug 07, 2012 at 08:01 PM
tomrock
Offline
• • •
Upload & Sell: On
p.1 #7 · sigma 30 E mount problem/question


I didn't read the manual -- there were lots of threads about this when the lenses first came out. People in those threads read the manual for me.


Aug 07, 2012 at 08:33 PM
Lan11
Offline
• •
Upload & Sell: Off
p.1 #8 · sigma 30 E mount problem/question


Both rattle, but 19 mm less. They're relatively inexpensive, but I wasn't sure about the long term effect of this internal knocking on performance and return both. I hate gear failures.
The 30 was nice. The 19 was unimpressive off center with poor corners.



Aug 08, 2012 at 03:07 PM





FM Forums | Alternative Gear & Lenses | Join Upload & Sell

    
 

You are not logged in. Login or Register

Username   Password    Retrive password