Ted Kahn

Ted Kahn

Lives in United States United States
Joined on Jun 26, 2005

Ted Kahn's recent activity

  • It almost looks like the edges of the picture are being masked off to show you what a different aspect ratio would look like.  Were you experimenting with some sort of widescreen or panorama setting?
  • The dust is on a piece of glass that's a short distance in front of the sensor, so the dust casts a shadow on the sensor. Imagine yourself standing just in front of a wall. If you're being ...
  • That isn't distortion.  It's strong perspective that arises from the fact that the image includes things that are very close to the camera as well as things that are far away.  You won't see such ...
  • It would definitely help to immobilize the camera in some way.  I suppose it isn't practical to use a tripod on a transmitter tower, and even a monopod might be too awkward.  But the camera, or ...
  • The atmosphere scatters blue light (short wavelengths) more than red light (long wavelengths), so haze in photos tends to be bluish.  You can reduce the amount of haze by putting a red filter over ...
  • Nowadays most polarizing filters are circular polarizers. That's because some cameras need them and no cameras are harmed by them, so there isn't much point in making linear polarizers any more. Wh ...
  • You need to format the card in the camera that you will use it in.  Formatting the card in the Samsung camera and then using it in the Canon camera can cause problems.  Try formatting the card in ...
  • I suggest that you look through the pictures you've taken with your P7700 and see what focal length you tend to gravitate towards.  Then convert that into the "equivalent" focal length for the ...
  • The amount of noise a sensor produces is independent of the lens that's being used. However, it's true that you tend to be less aware of noise in images that are full of sharp, contrasty, fine ...
  • Some of the reasons people get prime lenses include having a larger maximum aperture than you get with a kit zoom lens, having better image quality than you get with a kit zoom (although the ...
  • If you feel that the pictures are too dark, you can use exposure compensation to make them come out lighter.  That isn't cheating; that's what exposure compensation is for.  The light meter tries ...
  • Do an internet search for "threaded cable release" and you'll see what the whole thing looks like. It's kind of like a bicycle brake cable inside a sheath, except you push on the cable instead of ...
  • It's unsettling to think how large its predator must be. Look out, it's behind you!
  • Right, the smaller sensor means you need to use a shorter focal length to get the same field of view at a given camera-to-subject distance, and this means the aperture will be smaller.  The depth ...
  • f/22 is such a small aperture that diffraction will make the entire image look soft. With u4/3 you generally don't want to stop down beyond about f/11 unless you feel you can tolerate a bit of ...
  • Replied in No
    Camera designers have to worry about depth of focus because it tells them how much leeway for error they have when positioning the sensor during the manufacturing process.  This is a lot more ...
  • A lens designed for an APS-C sensor doesn't concentrate the light compared to a lens designed for a larger sensor.  If you just look at the part of the image that the two lenses have in common (in ...
  • Replied in Some answers
    The size of the aperture in both cases will be 50 mm divided by 1.8, which is about 27.8 mm.  The way it looks to you may vary depending on the design of the lens because lenses can magnify what ...
  • Replied in Some answers
    A 50 mm lens designed for u4/3 and a 50 mm lens designed for FF (using an adapter that lets you mount it on your camera) will give identical results if they are set to the same aperture.  Both the ...
  • If you haven't already tried a different memory card, that's worth a shot (but it isn't likely to solve the problem). By the way, it's curious that the date on that picture is 8 years ago, and the ...
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