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Sony Alpha SLT-A33 review
#23
[quote name='oneguy' timestamp='1300110772' post='6754']

That's a bullshit test, and you, who has never touched the camera, has valid opinions? Mot reviewers, including cameralab, dcresourcse, photoclubalpha, and even photozone reported no problem with AF. So there.



The AF performance matched that of 7D in side-by-side test, exact quote from IR.

[/quote]

I know that quote well. You have posted that nonsense how many times now?



Now, do what I did and analyze what they claimed.



Was it a taxing AF test? Car at that (they say from "perhaps" 21 meters distance to "perhaps" 5 meters distance) distance, with that low speed (about 50 km/h), lens at 150mm. Top lens used (70-200mm f2.8 G).



Is that taxing the AF system to see how it performs? Not really.



Are the crops impressive? Not really.

Crop 1: NOT in focus.

Crop 2: not really sharp.

Crop 3: not really sharp.

Crop 4: Totally OOF

Crop 5: Sharp.

Crop 6: not really sharp.

Crop 7: Sharp.

Crop 8: not really in focus.

Crop 9: Not in focus.



Does the claim that crop 4 is "camera shaken" make any sense at all? No, of course not. It is one of 9 shots within one second. Other shots would be shaken too. Stupid claim.



And what about the 7D "comparable performance"? It appears never to have taken place: no 7D lens mentioned, no 7D crops posted, nothing what so ever.



Does it matter, that 7D stuff? No, not really, the A55v crops are bad enough all on their own, it does not matter if there might be other cameras doing just as bad or not.



Cameralab, dcresource do not test the AF on AF tracking performance. Photozone's review gives no detail about IF, and if, HOW Af tracking performance was tested, so it is strange to right now put them forward as source.

photoclubalpha, no idea whether they have tested the AF tracking capability.



So what remains right now is a puzzling IR "test" that poses more questions than answers. It was not a particularly taxing AF track test, and the results are not great. Dpreview mentions that they have found the AF tracking performance lacking.



Just for you, I will do the following test:

I will find a stretch or road around here with speed control, to be sure the cars are driving around 50 km/h. I will measure around 20 meters distance, and start shooting in continuous mode, for the same duration (about 1 second, with my 70-200mm f4 L USM at 150mm setting.

With my camera that should result in about 3 images. I will focus on the car's bonnet emblem too. Then I will 100% crop the results and compare them to the IR results concerning sharpness. Then we will have something to actually compare the IR crops against.
  


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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