GSteele Offline Image Upload: Off
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I always get a chuckle out of the megapixel myths that float around, be it Nikon or Canon.
Ken Rockwell is scary and a bit off center, not to say that I am any more sane the he is, but here are some of my thoughts on the subject.
You can stretch or shrink the pixels so much before the interpolation starts looking bad. From my experience is that if I were to shoot strictly for web posting, I would use a sensor with around the approx 6 megapixel for a full frame capture. The reason being that you are compressing your pixel count (for let's say a 700 x 467 posting size) by a 18 to 1 while a 12 megapixel camera you are compressing by 36 to 1 and even more than that when they are converted to JPEG's. That is a whole lot of missing data from the original capture. Now the same is true for enlarging, but I find it not quite as noticeable, since we are filling in missing data and not throwing it away. I make my comment from actual usage from these different resolutions.
Having a lens that can match the pixel density of a given sensor IMHO is key to getting the most out of the combination, which naturally leaves the Point and Shoots (even though their pixel count may be higher than some DSLR's) out of the running for over all quality. Again, from my experience (not scientific by any means) I get a more consistent capture from EVERY situation and lighting condition from a quality lens as compared to a lower level entry level lens. I am not saying that the entry levels lenses are not good quality, as some are quite good, I just want my lenses to perform well at every aperture without having to worry about CA, Flair, edge sharpness, etc and that is where most inexpensive or entry levels lenses start to fail. You can do a comparison based on one lens' sweat spot where it may be difficult for others to keep up with, but it will fail over the entire range and conditions if compared to a high quality lens. Quite simply, if the lens company could produce a lens profitably for $300 and it out perform their $1200 comparable lens, then they would be selling it for $1200.
To me, real life photography is more complex than any single spec or series of specs. It is the combination of camera, lens and photographer that make everything work together.
Edited on Nov 30, 2005 at 09:09 PM
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