Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Tamron 70-300 VC exposure issues
#69
[quote name='mst' timestamp='1289429540' post='4095']

I stand corrected. I have just finished a few tests and can happily confirm now that after its latest trip to Tamron Service Europe the Di 60 meters as expected. Sorry for saying otherwise first, this was based on some shots in the field only, combined with ... uhm ... user error. A layer 8 issue <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='Big Grin' />

I will update the review accordingly. Probably also do a quick retest of the MTF values.

[/quote]



Hi Markus,

I haven't noticed the review update? Or something smells fishy again?

Got mine back from Tamron. As I somehow expected, I don't see an improvement in the max aperture department. I mean in M mode, the first click of stopping down the aperture from max doesn't seem to have any effect on the brightness (histogram) of the taken image, the second one barely some, then things start to get going as planned. I guess in MTF that should show as unreasonable sharpness wide open, and also as too wide DoF in the tilted ruler shot.

The A mode looks better than before I guess, though I didn't test seriously. I'm used to rolling the EC dial so I don't really care <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='Wink' />

Kind regards,

Sem



EDIT: I see the review update is there. I think the comment regarding the dark images at max aperture is consistent with what I see (notice that this is more noticeable in M than in A, because in A this is partially concealed by the meter, check the sequence of the shutter times when changing the aperture). I also see unreasonable sharpness wide-open, and the DoF in the tilted ruler shot is indeed not much narrower at F/2 than at F/2.8. I think you guys should not trust the specified apertures.
  


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)