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Forums > Back > Sony Alpha SLT-A33 review
#54
[quote name='Lomskij' timestamp='1300306161' post='6884']

Not sure if this proves anything (apart from that Canon camera prefers Lexus), but just out of interest:



Judging by those crops on the IR site, my math (which can be wrong obviously) tells me that car at the beginning of the sequence was around 26 meters away, which actually *should* help the AF, making the DOF wider.

[/quote]

How did you calculate that? The 70 foot comes to 21 meters here (using a calculator as I am not familiar all that much with feet <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='Wink' /> ), and I can not, from the crops, determine 26 meters. A foot is 0.3048 meters.



The Toyota (IR) obviously was further away than the Lexus (BC), and that should help the Toyota crops in 2 ways: DOF is a bit deeper and the AF has it easier when a subject is further away.



But, on DOF, I shot with f4 (lens is not faster. This makes the AF having a harder time, though. I also am not entirely sure about the aperture used with the Sony... You can not actually choose the aperture, and if it is like with the video mode with AF, the aperture is actually set to f3.5. Which then does not make a big difference to f4.



All in all, I can not conclude, from the IR crop samples, that the A55v (and therefor the A33) have a very capable AF tracking implementation.
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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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