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PostPosted: Wed Dec 10, 2008 8:48 pm 
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Yay, the parcel arrived today!
But don't expect an unpacking video from me :lol:
Battery is charging, 4GB SD-HC card inserted, first photos shot :P
What can I say? It works! 8)
Auto-ISO plus image stabilization is the best thing on these cameras since sliced bread. As usual I'm getting acquainted with the power of the IXUS 870 by using it fully automatic and looking critically at the results.
So far under incandescent lighting w/o flash some shots at ISO 200 which clearly show noise. But I will not ride the low-light capabilities of this cameras to death, as I didn't expect much better. The interesting part comes with daylight.

Already shot some Siemens-stars and found the lens to be pretty sharp. More details on this in the upcoming posts.

So stay tuned...

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PostPosted: Fri Dec 12, 2008 6:59 pm 
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Here is something for you from today. Freshly shot in the Bavarien snow within seconds of each other: One shot from the D300 with new AF-S 50/1.4G at f/4.0, 1/90, 200ISO (no IS) and the other with Canon IXUS 870IS set to a comparable focal length (15mm) at f/5.0, 1/50 sec, 200 ISO IS=on.

Image
If you click on this image it will lead you directly to the 100% crop!

Now: Which is which?!

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PostPosted: Fri Dec 12, 2008 7:03 pm 
The left one is from the D300 and the right one from the Ixus 870 - I'd be VERY much surprised if it was the other way round :D


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PostPosted: Fri Dec 12, 2008 7:07 pm 
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Well, for a connoisseur like you, that's easy to find out, right?
Just look at the noise...
Well at ISO 200 the Canon p&s is clearly suffering from it at 100% pixel-peeping levels. So at ISO 200 the point goes to the D300!

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PostPosted: Fri Dec 12, 2008 7:16 pm 
well if you don't make a large print of an ISO 200 shot, the 870 sure is fine. But as soon as you wanna make a poster or use even higher ISO it may become a problem


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PostPosted: Fri Dec 12, 2008 11:32 pm 
That's the whole problem with bridge cameras and P&S. They're good at ISO 50 and 100. Once you hit ISO 200 and above, you start to notice noise. That in my book is totally unacceptable. Well it is acceptable if you're not bothered by quality and want portability ...


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PostPosted: Fri Dec 12, 2008 11:47 pm 
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I will present some comparisons at ISO 80 in this review, the lowest ISO that the Canon will go. It is to be expected that the differences in IQ will be smaller then.
You'll be also in for a surprise if you want to shoot the D300 with a dof that is comparable to the 870IS. In this case you have to stop the lens down in a way that'll eliminate all benefits :shock: Why is that?
Well, a camera with a sensor that has almost a 4xlonger crop factor (or a 14x smaller sensor) has the benefit of having a dof that can only be achieved by the D300 when stopping down 3-4 stops. So an image taken with the IXUS 870IS at f/2.8 has a similar dof as an image taken with the D300 at f/8-f/11 in theory.
I'll try to get some images to prove this...

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Last edited by Thomas on Mon Jan 19, 2009 9:06 pm, edited 1 time in total.

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PostPosted: Sat Dec 13, 2008 10:33 am 
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Here's another one to show you what can happen when you shoot both cameras side-by-side:

Image
You can click directly through to the large (1574x999) 100% crop of the image. Shots were taken both at ISO 200, the Nikon at f/5.6, 1/60 sec, no IS, the Canon at f/5.0, 1/80sec, IS=on. So both cameras choose almost the same EV.

Would you hazard a guess as to which is which?

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PostPosted: Sat Dec 13, 2008 12:04 pm 
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Thomas wrote:
Image
.
Would you hazard a guess as to which is which?

Quite genuinely I preferred the one on the right .. amd then I checked the EXIF data. Thank goodness this is the Canon section! :!: :)

I doubt if I'd make the same assessment at ISO 200, though. :wink:

Bob.

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PostPosted: Sat Dec 13, 2008 1:19 pm 
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As this is a screen-shot from a side-by-side view in Lightroom2 the EXIF data don't tell you anything, Bob :twisted: So you'll have to sweat a little longer until I'll disclose the secret...
Anyone want to give it another shot?
----
P.S.: Both shots were taken at ISO 200!

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PostPosted: Sat Dec 13, 2008 1:37 pm 
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Ah, so the one on the right was from the D300. :lol:

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Astrophotography: TEC 140 'scope, FLI ML16803 camera, ASA DDM60 Pro mount.


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PostPosted: Sat Dec 13, 2008 6:03 pm 
I'd actually guess otherwise, the right shot is from the 870 - you can see quite some artifacts of artificial sharpening etc.

but this is VERY close I must admit, maybe due to the "natural noise" of the tree surface - and I might even guess wrong on this one :)


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PostPosted: Sat Dec 13, 2008 6:18 pm 
I'd say the right ones, are from the 870 IS! There is much more noise artefacts in both!


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PostPosted: Sat Dec 13, 2008 7:07 pm 
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True, the right half is sharper and it is not from the D300 :wink:
Whether it is too sharp is debatable, because the left image is perhaps not at it's peak potential sharpness.
I have taken the left part with the new Nikon AF-S 50/1.4G at f/5.6 so focus error should not cause this slight softness. IQ of the lens is certainly also not a problem. But at 1/60 sec with a lens that has an equivalent focal length of 75mm hand-held it might just be a little shake. The Canon's IS was switched on so that might have saved the day.
So this point goes to the little Canon!

This is proof that all the best equipment in the world not automatically gives you technically better photos. You also need the right shooting technique and/or a built-in IS (Nikon are you hearing me?!).

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PostPosted: Sat Dec 13, 2008 8:18 pm 
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Whoops. :oops:

What got me is that, on my monitor at least, the right hand image seems to show the same amount of shadow detail while still preserving good detail in the snow. You know, even knowing it was from the Canon, I still prefer the right hand image. :?

Maybe I should take up another hobby. :wink:

Bob.

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Olympus OM-D E-M1 + M.Zuiko Digital ED 12-40mm f/2.8, Lumix 7-14mm f/4, Leica DG Summilux 15mm f/1.7 ASPH, M.Zuiko Digital 45mm 1:1.8, M.Zuiko Digital ED 75mm 1:1.8.
Leica D Vario-Elmar 14mm-150mm f/3.5 - f/5.6 ASPH.
OM-D E-M5, H-PS14042E, Gitzo GT1541T, Arca-Swiss Z1 DP ball-head.
Astrophotography: TEC 140 'scope, FLI ML16803 camera, ASA DDM60 Pro mount.


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