The following warnings occurred:
Warning [2] count(): Parameter must be an array or an object that implements Countable - Line: 895 - File: showthread.php PHP 7.2.24-0ubuntu0.18.04.8 (Linux)
File Line Function
/showthread.php 895 errorHandler->error




Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Tamron 70-300 VC exposure issues
#1
Remember the exposure issue of the Tamron Di 60? Well, it seems we have another one ...



I've been shooting in the field with both the Nikon 70-300 VR and the Tamron 70-300 VC for a few days. Some of the Tamron shots looked rather fishy to me, they were a bit bright. A lot brighter than what the Nikon delivered in the same situations.



I did some tests with both lenses yesterday and this is what I got:



[Image: 70-300VC.png]



Left column is what the camera metered with the 70-300 VR (tried three copies, consistent results here). The center column is the 70-300 VC, manually set to the same exposure. As you can see, the results a very similar except stopped down at 70mm, where the Tamron either has higher transmission (unlikely IMO) or just does not set the aperture correctly (I did all these shots 10 times, so the possible variation in exposure due to the mechanical aperture lever is already ruled out).



The right columns shows what the camera metered with the 70-300 VC. Especially at lower focal lengths, the metering is way off. This matches what I saw in the field.



Currently, I have only one copy of the Tamron 70-300 VC. I'll try to find out if this is an issue of my copy only or a general issue of the lens (or more precisely the F-mount variant). Any help in this regard by owners of the lens is highly appreciated.



-- Markus
Editor
opticallimits.com

  


Messages In This Thread
Tamron 70-300 VC exposure issues - by mst - 09-16-2010, 08:01 AM
Tamron 70-300 VC exposure issues - by Klaus - 09-16-2010, 08:11 AM
Tamron 70-300 VC exposure issues - by mst - 09-16-2010, 08:20 AM
Tamron 70-300 VC exposure issues - by wim - 09-16-2010, 09:05 AM
Tamron 70-300 VC exposure issues - by mst - 09-16-2010, 09:12 AM
Tamron 70-300 VC exposure issues - by joachim - 09-16-2010, 03:14 PM
Tamron 70-300 VC exposure issues - by mst - 09-16-2010, 03:33 PM
Tamron 70-300 VC exposure issues - by Bare - 09-16-2010, 06:49 PM
Tamron 70-300 VC exposure issues - by Klaus - 09-16-2010, 07:53 PM
Tamron 70-300 VC exposure issues - by koulang - 09-17-2010, 04:35 AM
Tamron 70-300 VC exposure issues - by Bare - 09-17-2010, 10:33 AM
Tamron 70-300 VC exposure issues - by sth - 09-21-2010, 10:57 PM
Tamron 70-300 VC exposure issues - by Steinar1 - 09-23-2010, 02:15 PM
Tamron 70-300 VC exposure issues - by Steinar1 - 09-24-2010, 10:58 AM
Tamron 70-300 VC exposure issues - by Guest - 09-26-2010, 06:31 AM
Tamron 70-300 VC exposure issues - by Steinar1 - 09-27-2010, 02:20 PM
Tamron 70-300 VC exposure issues - by william9 - 10-06-2010, 04:41 PM
Tamron 70-300 VC exposure issues - by mst - 10-19-2010, 10:43 AM
Tamron 70-300 VC exposure issues - by mst - 10-19-2010, 10:46 AM
Tamron 70-300 VC exposure issues - by samos1111 - 10-25-2010, 08:24 AM
Tamron 70-300 VC exposure issues - by hackmann - 10-27-2010, 12:47 PM
Tamron 70-300 VC exposure issues - by mst - 10-27-2010, 01:25 PM
Tamron 70-300 VC exposure issues - by mst - 10-27-2010, 01:30 PM
Tamron 70-300 VC exposure issues - by wim - 10-27-2010, 01:44 PM
Tamron 70-300 VC exposure issues - by wim - 10-27-2010, 01:46 PM
Tamron 70-300 VC exposure issues - by mst - 10-27-2010, 02:03 PM
Tamron 70-300 VC exposure issues - by hackmann - 10-27-2010, 10:14 PM
Tamron 70-300 VC exposure issues - by samos1111 - 11-08-2010, 03:19 PM
Tamron 70-300 VC exposure issues - by samos1111 - 11-08-2010, 03:35 PM
Tamron 70-300 VC exposure issues - by hackmann - 11-08-2010, 11:00 PM
Tamron 70-300 VC exposure issues - by mst - 11-10-2010, 10:52 PM
Tamron 70-300 VC exposure issues - by samos1111 - 11-12-2010, 01:26 PM
Tamron 70-300 VC exposure issues - by samos1111 - 11-12-2010, 01:48 PM
Tamron 70-300 VC exposure issues - by wim - 11-13-2010, 02:03 AM
Tamron 70-300 VC exposure issues - by mst - 11-13-2010, 12:12 PM
Tamron 70-300 VC exposure issues - by mannypr - 11-17-2010, 09:36 PM
Tamron 70-300 VC exposure issues - by mst - 11-18-2010, 10:26 AM
Tamron 70-300 VC exposure issues - by mannypr - 11-19-2010, 01:07 AM
Tamron 70-300 VC exposure issues - by mst - 11-19-2010, 08:16 AM
Tamron 70-300 VC exposure issues - by Guest - 11-19-2010, 10:21 AM
Tamron 70-300 VC exposure issues - by mst - 11-19-2010, 11:49 AM
Tamron 70-300 VC exposure issues - by mannypr - 11-19-2010, 05:30 PM
Tamron 70-300 VC exposure issues - by mst - 11-19-2010, 06:18 PM
Tamron 70-300 VC exposure issues - by grahamnp - 11-20-2010, 05:42 AM
Tamron 70-300 VC exposure issues - by lugui - 11-27-2010, 07:47 AM
Tamron 70-300 VC exposure issues - by woodsfortysix - 11-27-2010, 04:16 PM
Tamron 70-300 VC exposure issues - by woodsfortysix - 11-28-2010, 12:30 AM
Tamron 70-300 VC exposure issues - by vincent_photo - 12-17-2010, 04:46 PM
Tamron 70-300 VC exposure issues - by opiecat - 12-18-2010, 08:09 PM
Tamron 70-300 VC exposure issues - by vincent_photo - 12-19-2010, 02:59 PM
Tamron 70-300 VC exposure issues - by Steinar1 - 12-20-2010, 06:03 PM
Tamron 70-300 VC exposure issues - by Klaus - 02-06-2011, 01:09 PM
Tamron 70-300 VC exposure issues - by sth - 02-06-2011, 04:42 PM
Tamron 70-300 VC exposure issues - by Klaus - 02-07-2011, 09:13 AM
Tamron 70-300 VC exposure issues - by koulang - 02-08-2011, 06:59 AM
Tamron 70-300 VC exposure issues - by Klaus - 02-08-2011, 07:21 AM
Tamron 70-300 VC exposure issues - by miro - 02-08-2011, 08:59 AM
Tamron 70-300 VC exposure issues - by mst - 02-08-2011, 09:31 AM
Tamron 70-300 VC exposure issues - by IanCD - 02-08-2011, 10:47 PM
Tamron 70-300 VC exposure issues - by IanCD - 02-08-2011, 11:03 PM
Tamron 70-300 VC exposure issues - by Klaus - 02-09-2011, 10:39 AM
Tamron 70-300 VC exposure issues - by mst - 02-09-2011, 10:56 AM
Tamron 70-300 VC exposure issues - by mst - 02-09-2011, 11:26 AM
Tamron 70-300 VC exposure issues - by IanCD - 02-09-2011, 06:32 PM
Tamron 70-300 VC exposure issues - by samos1111 - 02-16-2011, 09:51 AM
Tamron 70-300 VC exposure issues - by janjhoi - 02-26-2011, 04:16 AM
Tamron 70-300 VC exposure issues - by miro - 02-05-2011, 02:42 PM

Forum Jump:


Users browsing this thread:
1 Guest(s)