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Old Jan 4, 2011, 9:35 AM   #1
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Default SLT Alpha 55 - Noise reduction

I like the look of the Alpha 55 but dpreview complains about excessive noise reduction which I can see in their test images. Are they just being picky - I presume you can just reduce the noise reduction in the camera settings?
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Old Jan 4, 2011, 10:24 AM   #2
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Yes - you can reduce the in camera noise reduction for high ISO settings but I have found no problem with it.

I don't think there is an individual NR setting like in the FZ35-40-100

You can download the manual here

http://www.docs.sony.com/release/SLTA33.pdf

Of course there is noise reduction if you shoot RAW also
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Old Jan 5, 2011, 3:03 PM   #3
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Cheers Clint.

So far narrowed it down to the Sony SLT A55, Pentax k-r or the Canon T2i.
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Old Jan 5, 2011, 3:12 PM   #4
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The A55 is a very different compared to the K-r or T2i (thanks to the A55's mirror design with continuous phase detect AF shooting video).

But, if you want to add a camera to the mix that's more like the K-r or T2i (traditional SLR designs with a "flipping" mirror and optical viewfinder), you may also want to look at the Sony A580.

It's probably the best "bang for the buck" camera you'll find using the new Sony 16MP CMOS sensor (the Pentax K-5 and Nikon D7000 are priced a *lot* higher) and the A580 gives you a *much* better Live View system compared to any of it's competitors.
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Old Jan 5, 2011, 4:22 PM   #5
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you also get more battery life with the k-r and t2i and the a580 the jimc mention.
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Old Jan 6, 2011, 2:55 AM   #6
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What difference is there between the 560 and 580 other than 2MP? If that's all there is then the 560 probably gives lower noise and better low light performance?
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Old Jan 6, 2011, 6:18 AM   #7
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The A580 has a deeper buffer (22 raw frames versus 7 for the A560).

From what I can see comparing samples in various controlled conditions lighting, the A580 with it's newer 16MP CMOS Sensor has slightly lower chroma noise levels in shadows at higher ISO speed settings compared to the 14MP CMOS Sensor used in the A560, despite having more megapixels. That's probably one reason the A55 (using the new 16MP CMOS Sensor) tests a tiny better for noise levels compared to the NEX-5 (which uses a newer 14MP CMOS Sensor design, which I suspect is the same as the one in the A560), despite the light loss through the mirror with the A55.

Now, both sensors are very good. But, if you plan on shooting at very high ISO speeds often, or plan on shooting a lot of bursts in RAW (where the A580 has big advantage, thanks to it's larger internal buffer), I'd probably lean towards the A580.
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Old Jan 6, 2011, 7:15 AM   #8
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Cheers. I missed the 580 before because it's not on DXOMark - they only have the 550
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