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Videos (11) | Sift Talk (0) | Blogs (0) | Comments (48) |
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Megapixel Myth - David Pogue
Ok, in defense of the method used in video, resampling image:
David Pogue is showing the effect of only one variable on image quality. There are so many things which effect image quality from camera to camera. If you want to test only one variable then you must ensure that the others stay exactly the same. His method of testing ensures that only the resolution changes and nothing else.
If he were to have used three different cameras then there would have been all sorts of other things changing (image processor for CCD, sharpness of lenses etc.) which would effect the image and skew the results of the test.
You will get a better picture from a camera with great optics and a low megapixel than vice-versa. Also, when enlarging, which is where everyone says the megapixel count is important, the image sharpness is much more critical.
I'm a large format printer by trade and anything over A2 size only needs to be printed at 72 dpi max, and can easily go to 50 dpi as long as the image is sharp. If the lense is soft or the image processor poor then no amount of resolution can save your shots. We've had a lot of dissapointed/surprised customers wanting enlargements from their cheap 10 megapixel camera who moan it's all fuzzy when blown up.
I show them my camera (8 megapixel SLR) and they can't believe how stupid I was buying it: "Mine cost a third of that and it's got 10 megapixels!" They look at me in a pittiful way , how silly of him to waste that money. Then I show them prints of mine and they see why I spent the money on lenses not megapixels.
Megapixels are great if you can afford them with optics but I only have so much money and when buying a camera OPTICS COME FIRST!
An Unfinished Story - Colony Collapse Disorder
I like the topic of CCD, but this seems to imply that pollution and bad advertising kill bees. I favor the disease theory, because the abandoned hives are not plundered by the usual suspects. I think there has been some other evidence found in support of the disease theory, like a specific virus isolated in several hives.
Colony Collapse Disorder - Why are the bees disapearing?
It's more likely pesticides. There are pesticides called neonicotinoids which basically give the pests the insect version of alzheimers, which sounds exactly like what's going on here.
Also try the article at Cosmos That's a almost perfect description of what happens in CCD....