A900 keeping up with D700- EXHIBIT-A

Started Oct 25, 2008 | Discussions
JohnBee
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A900 keeping up with D700- EXHIBIT-A
Oct 25, 2008

In light of my introductory post, I figured we could safely omit ISO 1600 since there are no measurable differences between the D700 and the A900 in the noise dept.

In fact... I would have no problems admitting that the A900 out-resolves the D700 in resolution and contrast detail. Whether this is the result of less destructive NR processing(though both off), or.. simply the results of the added MP and DR coming through I do not know, however, the results are observable nonetheless.

Here we have a side by side ISO 3200 samples with decent shadow curves from both the D700 and A900. I did not label them because I would be curious to see who can identify which is which. Whatever, the case, the differences between the two samples are negligible and even finer in print. Either way... I would say the A900 is holding up very well against the D700 at ISO3200.

  • Please keep in mind that both files have been converted to JPG for storage and so there are quality losses as well... However, if anyone wants to see the uncompressed TIFF samples, I can post them as well.

andrea buso
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Re: A900 keeping up with D700- EXHIBIT-A
In reply to JohnBee, Oct 25, 2008

a900 is the second one?

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pheanix300
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Re: A900 keeping up with D700- EXHIBIT-A
In reply to JohnBee, Oct 25, 2008

I'm not a pixel peeper but the exposure seems slightly different between the two. If all settings were the same, I'd guess the 2nd one is A900.
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taamberg
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Re: A900 keeping up with D700- EXHIBIT-A
In reply to JohnBee, Oct 25, 2008

Top is A900? I concluded that because the noise isn't as tight, it's a bit more "splotchy".

Still though, not much difference. Am I correct in my understanding that the A900 is just roughly .75 F-stop worse performing, IF you get the exposure of the scene spot-on? The D3 seems (by the samples I see) to be more forgiving (and can handle ISO6400+ much better), at the cost of significant resolution.

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Ken_5D
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Top D700 botton A900
In reply to JohnBee, Oct 25, 2008

but only about 65% confidence in this
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headofdestiny
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Re: Top D700 botton A900
In reply to Ken_5D, Oct 25, 2008

Wow, great idea. They are clearly close, and I'd take either one. I'm gonna guess that the A900 is on top, but I'm not betting on it. lol.

Keep these comparisons coming!

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mike_2008
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Re: Top D700 botton A900
In reply to headofdestiny, Oct 25, 2008

for iso3200 this is an excellent result. i would guess the lower shot is the a900, but it's hard to tell.

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andrea buso
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Re: Top D700 botton A900
In reply to mike_2008, Oct 25, 2008

the bottom image got the "sphere mad of chopped sticks" clearly sharper on the edge of the sticks.

the grain of the bottom image is a little more "salt and pepper" and of smaller size, which is typical of a larger file that has been downsized.

also the roll out on the high light is a bit smoother on the bottom image. the a900 got a little more DR than the a700, also a larger file, represent a gradient with more pixels and deliver a smoother roll out.
For these 3 observations, IMO the bottom image is the a900.

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SteveGJ
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Re: A900 keeping up with D700- EXHIBIT-A
In reply to JohnBee, Oct 25, 2008

I haven't read the response yet, but the first has more detail and I'll guess it's the A900 (or is it the D700 as noise and NR will have damaged the A900 photo...). Nope - I'll go with the first being the A900. If I'm right I will be delighted, if I'm wrong then I'll say what else would you expect.

ps. blind testing - something which I think should be done a lot more. (Is blind testing actually the right term for evaluating photos?)

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andrea buso
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There is also more CA on the pic on top, very likely a700
In reply to andrea buso, Oct 25, 2008

a900 bottom

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Ilkka Nissilä
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Re: A900 keeping up with D700- EXHIBIT-A
In reply to JohnBee, Oct 25, 2008

The first image has loads of CA in the top part (tips). I guess lenses play a big part here.

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ErminGut
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Bottom A900
In reply to andrea buso, Oct 25, 2008

I think finer noise pattern is due to downscaling.

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moire
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Re: There is also more CA on the pic on top, very likely a700
In reply to andrea buso, Oct 25, 2008

The top one is A900, the noise pattern looks like a900's
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andrea buso
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Re: Bottom A900
In reply to ErminGut, Oct 25, 2008

ErminGut wrote:

I think finer noise pattern is due to downscaling.

that is what i meant.

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JohnBee
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Re: A900 keeping up with D700- EXHIBIT-A
In reply to andrea buso, Oct 26, 2008

Well hello everyone and thanks very much for looking this over.

The short answer is(as most of you figured it out), is the D700 is on top and the A900 is on the bottom. - I should of use better interpolation in my downsizing process

The point I wanted to make here was, that so the A900 is not trudging in noise at higher ISO's as some would have it. Based on what I have read, one would think that the camera was a mess at anything above 400! - But as you can all see, even in shadow regions, the A900 offers exceptional detail against even some of the best in the industry.

To help drive my point, the next sample will be at ISO6400 with a similar scene.

My findings are that, though the Sony does exhibit more noise than the D700, it is still very usable and not as severe as many would have it.

I would also like to thank Chadd Thompson, for being so kind in posting these RAW images on dpreview and making these tests possible

I will post my next samples shortly...

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JohnBee
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Almost forgot
In reply to JohnBee, Oct 26, 2008

I also wanted to mention that in print, both are gorgeous and virtually undistinguishable
But also that the A900's extra resolution comes as a positive feature also.

Both camera's samples, came without NR and required no work other than running default noise reduction. I did so to the best of my abilities and found that pushing either image any further than shown here resulted in a loss in IQ.

Again... thanks for looking

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Vivec
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Re: Almost forgot
In reply to JohnBee, Oct 26, 2008

Awesome test John!

I looked at both pictures and liked the bottom one more since the "noise" looks more pleasant to me. Given the negative comments in the review on DPReview, I assumed that the top one would be the a900 -- what a pleasant suprise to find that the bottom one was actually the a900

It is very good to know that the a900 can be equal in practice to the D700 with regard to ISO 3200.

Cheers

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Ken_5D
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Re: A900 keeping up with D700- EXHIBIT-A
In reply to JohnBee, Oct 26, 2008

JohnBee wrote:

Well hello everyone and thanks very much for looking this over.

The short answer is(as most of you figured it out), is the D700 is on
top and the A900 is on the bottom. - I should of use better
interpolation in my downsizing process

The point I wanted to make here was, that so the A900 is not trudging
in noise at higher ISO's as some would have it. Based on what I have
read, one would think that the camera was a mess at anything above
400! - But as you can all see, even in shadow regions, the A900
offers exceptional detail against even some of the best in the
industry.

To help drive my point, the next sample will be at ISO6400 with a
similar scene.
My findings are that, though the Sony does exhibit more noise than
the D700, it is still very usable and not as severe as many would
have it.

I would also like to thank Chadd Thompson, for being so kind in
posting these RAW images on dpreview and making these tests possible

I will post my next samples shortly...

I wasn't sure about the noise pattern.. so I keyed in on sharpness of details like the fine fibers off the basket.. Edge on this stuff A900 even when scaled.
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Some of my work at:
http://gallery.cascadephotoworks.com

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maiaibing
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Close call - I prefer #1
In reply to JohnBee, Oct 26, 2008

I think they look pretty close. I prefer the noise pattern in the first picture.

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RalphDurst
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I second that. TOP = A900
In reply to moire, Oct 26, 2008

It looks softer, sign of a heavier noise reduction to me.

If I had to question the veracity of the OP, I'd say both are from the same camera (D700). Colors are identical, highlight rollout is identical on both wooden balls...

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