mobile photography technology, culture and community


Lives in United States Tucson, AZ, United States
Works as a Physics PhD Candidate
Joined on Jul 17, 2006

Entropius' recent activity

  • Looks like a Canon version of the Nikon 80-400G. That Nikon is an excellent lens so if Canon's lens wonks are as good as Nikon's, it should be a good thing.

  • I wonder how the AF compares to the system in the D7100, the closest thing Nikon makes? AF speed and accuracy, more than anything else, is the killer feature for the sort of action work that this...

  • It doesn't work that way: normal and wideangle lenses can be made substantially smaller for APS-C, but telephoto lenses for APS-C and FX are basically the same.

  • I have a 20" print on my wall taken with an eight-year-old small-sensor superzoom (Panasonic FZ50) that looks *fantastic*. I shoot Nikon DX now so I know what modern large sensors can do, but these...

  • @Bustard, it really is that simple -- I don't know why people try to overcomplicate this beyond what you have just described.

  • Android and OSX both "copied" a real operating system to get their start: Unix.

  • Yes.

    Noise reduction is crucial on data coming from a tiny sensor, and that can be better done by a 35-watt Core i5 in a few seconds than by a smartphone CPU running on a few hundred milliwatts in...

  • Commented on Olympus OM-D E-M10 Review preview

    It's 300 f/4, isn't it? That's what I'd rather have anyway.

    If I'm able to sell my D7100 + 80-400G for E-M1 + 300 f/4 + 1.4x TC, I will definitely consider it.

  • I have a close friend with CF who is an excellent photographer -- and, thanks to modern treatment, lives a pretty normal life. He's even a good singer, something that would be unthinkable not too...

  • Commented on Updated: Creating the Leica T article

    Of course it's spin; wouldn't an actual design document be written in, say, German?

  • Shooting a D7100 at f/32 will degrade the image due to diffraction exactly as much as shooting a Q7 at the aperture that achieves the same depth of field.

  • That's because the Q7 has so much more depth of field at the same f/number because of the bigger sensor. A D7100 can be shot at f/32 to get the same effect.

  • Samsung will be sued no matter what. If Apple can sue over rounded rectangles, it can sue over anything.

  • Commented on Pentax K-3 preview

    If Pentax made the lens I wanted (a 400 f/5.6) I'd have gotten one in a heartbeat. When it comes to the camera itself they seem to consistently get all the features right.

  • Commented on Olympus OM-D E-M10 Review preview

    Perhaps they make better cameras. Olympus makes great lenses, and that's sort of the draw of Micro Four Thirds. Just off the top of my head, the lenses that are known to be quite good:


  • Commented on Olympus OM-D E-M10 Review preview

    The go-to affordable portrait lens on m4/3 is the Olympus 45/1.8, which is a few hundred bucks. It is wicked sharp wide open and gives nice bokeh.

    What else do you want?

  • Commented on Olympus OM-D E-M10 Review preview

    Olympus IBIS has always been quite good (all the way back to my first DSLR, the E-510). I agree with your assessment of the E-M5; I rented one once and was blown away, and would probably have one...

  • Smaller format lenses are only easier to make if they're wideangle. Making a 300mm for CX is not much easier than making a 300mm for FX. (Actually, it's harder, if you want the same resolution in...

  • The Olympus lens is also substantially slower (f/6.7, isn't it?)

  • Nikon is very very good at making IS systems. I have the 80-400 AFS. Used on a 24MP DX body, the pixel-level magnification is nuts -- yet I can handhold shots down to 1/50 at 400mm consistently.

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