What is the megapixel myth? Read the following exchange:
"Hello sir, may I help you with the cameras?"
"Oh, yes. Thanks... I was trying to decide between the Nikon d90 and the Canon 7d... Do you have any suggestions?"
"Well, as you can see, the Nikon shoots at 12 megapixels. The Canon shoots at 18. That's why you see such a price jump from $1,099 to $1,699."
"So you think I should get the Canon 7d?"
"Yes, it is much better because it shoots at a much higher resolution."
Well, if that is your only reason for choosing the Canon 7d over the Nikon d90, you are off to the wrong start in the dSLR photography business. Actually in any digital photography business. Digital cameras cannot be defined by their megapixels. Let me give you an example:
The 6 megapixel Nikon d40 dSLR camera is so much better than almost any 10 megapixel point and shoot camera. There are so many reasons for this, from the sensor size and quality to the lens on the camera.
The megapixel myth is basically the belief that more megapixels equals a better camera. The problem with most small point and shoot cameras is that they have such a small sensor inside them that having a lot of megapixels is actually worse for them.
If you imagine a camera sensor, there is only so much space on it. The more tiny little light sensors you try to cram on there, the smaller each will be. Typically, smaller pixels are going to have a hard time capturing light, therefore the noise (amount of grain) in the pictures the camera takes will increase. On the other hand, having a large sensor with fewer pixels will equal much better light capturing ability. That's why point and shoot cameras look horrible when you shoot in low light without a flash. Most dSLR cameras will look fine in the same situation.
Be wary of buying a camera just because it has more megapixels. What's much better than more megapixels is a bigger imaging sensor size. And here is one other plus to having a bigger sensor in the camera: it means you can have shallower depth of field... In other words, its much easier to make the backgrounds blurry, leading to a more professional looking shot.
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