PHOTOOG Photography writings by Olivier Giroux


What Radar-plots Are For :^)

Example: Comparing the suitability of different solutions (kinds of cameras A,B,C,D) with a problem space (personal interests).

Of course, it's easy to tweak the values in the chart until it says what you want it to say.  ;^)

I note that Excel doesn't smoothly join the ends of smooth curves: the first derivative, per dr, of the curve function isn't smooth at the join point.  Tsk tsk.

I'm not sure that I like my breakdown of categories...  I think I will try and come up with something cleaner.

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  1. Hello Olivier,

    This radar plot of yours makes me wonders. I remember tying the same a while a go, unfortunately price was a pretty big constrain 🙂 .

    First time I saw the G1 I wasn’t very impressed. It seems to me it has lot’s of shortcomings, most important being the availability with relative affordable lenses.

    Although it makes sense as a transition body to Leica, I wonder how this would work as a stand alone system. I now see some really remarkable lenses in the four thirds format: the Olympus ED 50mm F/2 Macro and ED 12-60 really stand up to sigma 50 f/1.4. The Olympus prime at least is truly impressive.
    The dpreview comparison speaks a lot in this direction. Look at F4 performance for both lenses. Is that Leica quality or what? 🙂,22&fullscreen=true&av=2,2&fl=50,50&vis=VisualiserSharpnessMTF,VisualiserSharpnessMTF&stack=horizontal&lock=&config=/lensreviews/widget/LensReviewConfiguration.xml%3F3

  2. Many Zuiko lenses are optically excellent. The build quality is highly variable though from those I’ve seen. Recently I think Olympus plugged the biggest hole in their line up with the E30 and the 9-18 Zuiko lens – I hope it sells well even if it’s not for me.

    My personal bone with Olympus has been with the control scheme, more than the equipment itself. I tried a few of their low-end bodies in stores, and just fought with the cameras to have them do really basic things. Their viewfinders are also tiny and dark, no comparison to the D700 (or even the D80).

    At this moment I don’t think the Panasonic G1 makes the heart of a complete system. Not for an advanced photographer. It can make a nice supplement, toy or beginner system. It’ll take a few years for the momentum to build there.

    If you’re thinking of yourself, I think you’d best continue down the logical path from your D40. We are for sure going to see a successor to that line this year, one that probably shoots HD video. We may yet be surprised with G1-like innovations at Nikon too, who knows, Nikon could make a micro-F (no technical reason why not).

    As for the Zuiko 50mm comparison… you have to consider frame coverage when you evaluate lenses. The Sigma is a full-frame lens and the Zuiko lights up only 1/4 the frame area – that makes the Sigma’s job much more difficult. The Zuiko is more appropriately compared to a 100mm full-frame lens to be fair. The Sigma is also an f/1.4 and the Zuiko is not, that also makes the Sigma’s job difficult. The 2/50 ZF is a good example of the full-frame quality you can get if you don’t go to 1.4.

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