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Sony Alpha SLT-A33 review
#50
Most user reviews in dyxum.com say that the Tamron 60/2.0 is slow to focus. The Canon 60/2.8 on the other hand is known to be one of the faster-focusing macro lenses around (at least according to user reviews in fredmiranda.com). Testing the Tamron on the EOS-7D will give you a better point of comparison.



The kit lenses are a similar story. One of the users at dyxum.com had this to say about the Sony 18-55 SAM: "Extremely poor auto-focus (slow and unreliable in anything but good light)". This is from a user who also used the following lenses: Sony 16-105, Sony 18-70, Minolta 17-35, Minolta 20-35, Minolta 24-50. He has enough experience to compare its performance. Another user had this to say about the lens: "slow to almost none af in low light". Among the 44 review at fredmiranda.com I couldn't find a single one that complained the the Canon 18-55 IS is slow to focus. In fact, quite a few of them raved about its fast and accurate AF.



Bottom line: SAM motors are very different than SSM motors. The former are a marketing trick. They are slow and noisy and were only released to the market by Sony as a cheap answer to "those in the know" (e.g. salesmen and Canikon FUD-spreading fanboys) that claim screwdrive AF is a disadvantage. Tamron isn't known for fast focusing lenses and the 60/2.0 is a typical example, if not the worst. Both Canon lenses you've used are much better, and this means that your findings, as interesting as they may be, are not really valid. At least not as a comparison of the AF capabilities of these cameras.
  


Messages In This Thread
Sony Alpha SLT-A33 review - by Klaus - 03-13-2011, 11:05 AM
Sony Alpha SLT-A33 review - by Guest - 03-13-2011, 03:22 PM
Sony Alpha SLT-A33 review - by youpii - 03-13-2011, 04:52 PM
Sony Alpha SLT-A33 review - by Guest - 03-13-2011, 10:35 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-13-2011, 11:16 PM
Sony Alpha SLT-A33 review - by Guest - 03-14-2011, 03:35 AM
Sony Alpha SLT-A33 review - by Guest - 03-14-2011, 03:40 AM
Sony Alpha SLT-A33 review - by Klaus - 03-14-2011, 07:23 AM
Sony Alpha SLT-A33 review - by Sibbi - 03-14-2011, 09:40 AM
Sony Alpha SLT-A33 review - by Sibbi - 03-14-2011, 09:59 AM
Sony Alpha SLT-A33 review - by Yakim - 03-14-2011, 10:23 AM
Sony Alpha SLT-A33 review - by Klaus - 03-14-2011, 10:52 AM
Sony Alpha SLT-A33 review - by Brightcolours - 03-14-2011, 11:06 AM
Sony Alpha SLT-A33 review - by Guest - 03-14-2011, 11:15 AM
Sony Alpha SLT-A33 review - by Brightcolours - 03-14-2011, 11:17 AM
Sony Alpha SLT-A33 review - by Brightcolours - 03-14-2011, 11:36 AM
Sony Alpha SLT-A33 review - by Guest - 03-14-2011, 12:04 PM
Sony Alpha SLT-A33 review - by Guest - 03-14-2011, 12:07 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-14-2011, 12:38 PM
Sony Alpha SLT-A33 review - by Yakim - 03-14-2011, 01:35 PM
Sony Alpha SLT-A33 review - by Guest - 03-14-2011, 01:47 PM
Sony Alpha SLT-A33 review - by Guest - 03-14-2011, 01:52 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-14-2011, 02:40 PM
Sony Alpha SLT-A33 review - by Guest - 03-14-2011, 03:24 PM
Sony Alpha SLT-A33 review - by Guest - 03-14-2011, 03:34 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-14-2011, 04:06 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-14-2011, 04:10 PM
Sony Alpha SLT-A33 review - by Klaus - 03-14-2011, 04:22 PM
Sony Alpha SLT-A33 review - by boren - 03-14-2011, 06:03 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-14-2011, 06:25 PM
Sony Alpha SLT-A33 review - by boren - 03-14-2011, 06:59 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-14-2011, 07:05 PM
Sony Alpha SLT-A33 review - by Guest - 03-14-2011, 11:07 PM
Sony Alpha SLT-A33 review - by Guest - 03-15-2011, 05:30 AM
Sony Alpha SLT-A33 review - by Guest - 03-15-2011, 05:32 AM
Sony Alpha SLT-A33 review - by Guest - 03-15-2011, 06:37 AM
Sony Alpha SLT-A33 review - by Yakim - 03-15-2011, 06:58 AM
Sony Alpha SLT-A33 review - by Guest - 03-15-2011, 10:10 AM
Sony Alpha SLT-A33 review - by Yakim - 03-15-2011, 10:27 AM
Sony Alpha SLT-A33 review - by popo - 03-15-2011, 11:11 AM
Sony Alpha SLT-A33 review - by Brightcolours - 03-15-2011, 11:32 AM
Sony Alpha SLT-A33 review - by Brightcolours - 03-15-2011, 11:36 AM
Sony Alpha SLT-A33 review - by Guest - 03-15-2011, 12:33 PM
Sony Alpha SLT-A33 review - by Guest - 03-15-2011, 12:40 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-15-2011, 12:50 PM
Sony Alpha SLT-A33 review - by Guest - 03-15-2011, 12:56 PM
Sony Alpha SLT-A33 review - by Guest - 03-15-2011, 01:06 PM
Sony Alpha SLT-A33 review - by boren - 03-15-2011, 02:34 PM
Sony Alpha SLT-A33 review - by Yakim - 03-15-2011, 02:43 PM
Sony Alpha SLT-A33 review - by boren - 03-15-2011, 05:06 PM
Sony Alpha SLT-A33 review - by Yakim - 03-16-2011, 07:00 AM
Sony Alpha SLT-A33 review - by Brightcolours - 03-16-2011, 02:45 PM
Sony Alpha SLT-A33 review - by Guest - 03-16-2011, 08:09 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-16-2011, 08:29 PM
Sony Alpha SLT-A33 review - by Guest - 03-16-2011, 09:31 PM
Sony Alpha SLT-A33 review - by Guest - 03-17-2011, 10:28 AM
Sony Alpha SLT-A33 review - by Brightcolours - 03-17-2011, 11:14 AM
Sony Alpha SLT-A33 review - by Yakim - 03-17-2011, 01:35 PM
Sony Alpha SLT-A33 review - by Guest - 03-18-2011, 06:22 AM
Sony Alpha SLT-A33 review - by Brightcolours - 03-18-2011, 11:39 AM
Sony Alpha SLT-A33 review - by Klaus - 03-18-2011, 11:59 AM
Sony Alpha SLT-A33 review - by boren - 03-18-2011, 01:07 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-18-2011, 01:19 PM
Sony Alpha SLT-A33 review - by mst - 03-18-2011, 01:20 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-18-2011, 01:22 PM
Sony Alpha SLT-A33 review - by mst - 03-18-2011, 01:33 PM
Sony Alpha SLT-A33 review - by Brightcolours - 03-18-2011, 02:47 PM
Sony Alpha SLT-A33 review - by Guest - 03-18-2011, 04:57 PM
Sony Alpha SLT-A33 review - by Guest - 03-19-2011, 08:54 AM
Sony Alpha SLT-A33 review - by Brightcolours - 03-19-2011, 09:42 AM
Sony Alpha SLT-A33 review - by mst - 03-19-2011, 10:04 AM
Sony Alpha SLT-A33 review - by Yakim - 03-20-2011, 06:49 AM
Sony Alpha SLT-A33 review - by Guest - 03-20-2011, 07:38 AM

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