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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 06 Feb 2018 (Tuesday) 21:26
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Tamron AF Aspherical XR Di LD (IF) 28-300mm 1:3.5-6.3 Macro breakdown

 
galelegg
Junior Member
23 posts
Likes: 5
Joined Feb 2017
Location: Melbourne
     
Feb 06, 2018 21:26 |  #1

About 8 months ago I bought Tamron 28-300mm Ef mount zoom, 2nd hand from Ebay. It worked fine for 4 months and it then started to show the ER reading. Over the next month this error message became more prevalent and now I find I cannot use it beyond 100mm. I spoke with a repair technician who advised that it was an aperture fault with the wiring connections and the lens would have to be completely disassembled for repair. From internet searching I found a temporary solution was to tape over the brass contacts and the lens would work in manual focus mode ok. Could someone point me in the direction of a diagram that explains what the 7 brass contacts on the lens mean? My lens from right to left a small brass square, a brass rectangle the contacts rise to another level closer to the camera body then 5 other square brass contacts. I was considering taping over the contact that controls aperture and use the lens in TV or manual mode. Can anyone help.




  
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John ­ from ­ PA
Cream of the Crop
7,891 posts
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Location: Southeast Pennsylvania
Post edited 3 months ago by John from PA.
     
Feb 12, 2018 03:11 |  #2

Try http://web.media.mit.e​du …y/invariant/mov​e_lens.pdf (external link) or http://pinoutguide.com …ns_connector_pi​nout.shtml (external link).




  
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Tamron AF Aspherical XR Di LD (IF) 28-300mm 1:3.5-6.3 Macro breakdown
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
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