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Do-it-yourself centering sanity check
#42
Around 2004 I purchased a Canon 70-200mm 4:0 lens. It had serious decentering problems, so I send it to the official Canon repair centre in the Netherlands. The lens was returned within a fortnight or so with a letter saying the lens was fine, it was all with in the margings. But the lens gave a terrible decentering at the long end. For certain kind of images the lens was fine, but for others it was terrible and I hated the lens. One day I dropped it accidently. Front lens element was broken. I send it to the repair center, I got it back with a scratch on the new glass element and there was considerable room within the zoom. So, I sent it back again and they fixed it.

 

And to my suprise the decentering was gone! Not the first time I got disappointed by the Dutch Canon repair center and not the last. But now I can use this image in the future for an easy check up.

 

So, thanks!

 

 

Kind regards,


Reinier
  


Messages In This Thread
Do-it-yourself centering sanity check - by Klaus - 04-05-2011, 07:27 PM
Do-it-yourself centering sanity check - by popo - 04-05-2011, 07:40 PM
Do-it-yourself centering sanity check - by Klaus - 04-05-2011, 07:52 PM
Do-it-yourself centering sanity check - by IanCD - 04-05-2011, 10:01 PM
Do-it-yourself centering sanity check - by netrex - 04-06-2011, 12:11 AM
Do-it-yourself centering sanity check - by Klaus - 04-06-2011, 05:27 AM
Do-it-yourself centering sanity check - by Ayoh - 04-06-2011, 06:23 AM
Do-it-yourself centering sanity check - by Klaus - 04-06-2011, 06:44 AM
Do-it-yourself centering sanity check - by Steinar1 - 04-06-2011, 08:56 AM
Do-it-yourself centering sanity check - by Klaus - 04-06-2011, 09:12 AM
Do-it-yourself centering sanity check - by Guest - 04-06-2011, 11:33 AM
Do-it-yourself centering sanity check - by Steinar1 - 04-06-2011, 12:48 PM
Do-it-yourself centering sanity check - by mst - 04-06-2011, 01:31 PM
Do-it-yourself centering sanity check - by Klaus - 04-06-2011, 01:47 PM
Do-it-yourself centering sanity check - by Klaus - 04-06-2011, 04:32 PM
Do-it-yourself centering sanity check - by Steinar1 - 04-06-2011, 10:02 PM
Do-it-yourself centering sanity check - by DenisLV - 08-24-2012, 07:52 AM
Do-it-yourself centering sanity check - by Rainer - 08-24-2012, 06:42 PM
Do-it-yourself centering sanity check - by DenisLV - 08-25-2012, 09:02 AM
Do-it-yourself centering sanity check - by ouki - 10-04-2013, 11:31 PM
Do-it-yourself centering sanity check - by Klaus - 12-28-2013, 08:28 AM
Do-it-yourself centering sanity check - by josa - 02-17-2014, 11:00 AM
Do-it-yourself centering sanity check - by mst - 02-17-2014, 03:00 PM
Do-it-yourself centering sanity check - by josa - 02-17-2014, 06:26 PM
Do-it-yourself centering sanity check - by casual snapper - 02-17-2014, 08:47 PM
Do-it-yourself centering sanity check - by Guest - 02-18-2014, 04:12 PM
Do-it-yourself centering sanity check - by casual snapper - 02-21-2014, 03:36 PM
Do-it-yourself centering sanity check - by TomPhillpotts - 11-20-2014, 01:50 AM
Do-it-yourself centering sanity check - by Klaus - 11-20-2014, 08:48 AM
Do-it-yourself centering sanity check - by TomPhillpotts - 11-20-2014, 10:48 AM
Do-it-yourself centering sanity check - by Klaus - 11-21-2014, 11:39 AM
Do-it-yourself centering sanity check - by Klaus - 11-22-2014, 11:39 AM
Do-it-yourself centering sanity check - by Bghead8che - 12-05-2015, 11:49 PM
Do-it-yourself centering sanity check - by Guest - 12-06-2015, 01:19 PM
Do-it-yourself centering sanity check - by toni-a - 06-21-2016, 07:42 PM
Do-it-yourself centering sanity check - by Reinier - 10-01-2016, 02:21 PM
Do-it-yourself centering sanity check - by Klaus - 02-13-2018, 11:45 PM

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