what is the difference between mega pixels and optical zoom?

megapixel camera wikipedia image

rne2004

can anyone explain the difference between these two?
is this right the more mega pixels a camera has the further you can see? what about the Optical Zoom?

Answer
They have NO relation. They are extremely different.
A megapixel (MP) is 1 million pixels, and is a term used not only for the number of pixels in an image, but also to express the number of image sensor elements of digital cameras or the number of display elements of digital displays
Basically an Optical Zoom is a zoom lens. The length of Optical Zoom (point and shoot camera's refer to them as #.#x values, like 4.6x or 2.0x zoom length) is just how far it can zoom.
Read up on Megapixels: http://en.wikipedia.org/wiki/Pixel#Megapixel
Read up on Optical Zoom/Zoom Lens: http://en.wikipedia.org/wiki/Optical_zoom

What is the resolution of the camera onboard the hubble space telescope?

James B

Answer
Hubble has several imaging instruments. Two main ones are the Advanced Camera for Surveys (ACS) and the Wide Field and Planetary Camera 2 (WFPC2). Information below at the Wikipedia links. If you mean "how many megapixels" to compare with an off-the-shelf digital camera then ACS is a 16.7 megapixel camera and WFPC2 is about 2.5 megapixels (according to the information on Wikipedia.) WFPC2 was used to image the famous Hubble Deep Field and the Pillars of Creation images. (Any Hubble image with that stair-step pattern was done by WFPC2.)

The angular resolution of the telescope, which is the important point from the point of view of astronomical observations is about 50 milliarcseconds.

Powered by Yahoo! Answers

Title Post: what is the difference between mega pixels and optical zoom?
Rating: 92% based on 9788 ratings. 5 user reviews.
Author: Yukie

Thanks For Coming To My Blog