Go Back   Steve's Digicams Forums >

LinkBack Thread Tools Search this Thread
Old Jul 8, 2002, 10:24 PM   #1
Senior Member
normc's Avatar
Join Date: Jun 2002
Posts: 394

If I have a Canon 10x zoomed out 2,6 pix's and take the same picture with a Sony 707 at 5 pix's zoomed out and then crop to the same scale as the Canon is the overall result about the same?
normc is offline   Reply With Quote
Sponsored Links
Old Jul 10, 2002, 12:55 AM   #2
Junior Member
devnull's Avatar
Join Date: Jul 2002
Posts: 5

I've been going through the math in my head and have pretty much come to the conclusion that zoom wins over pixel count. In your case, you have twice as much zoom (10x vs. 5x) AND more pixels with your Canon. It wins.

Here's a simple example. Take a square of size 1K x 1K (1Mpp). A 4Mpp (2K x 2K) camera will be able to squeeze this into one fourth of the screen.

If you use a 2x zoom on the original 1Kx1K square, each dimension will double, effectively filling your entire screen. Let's say this is on a *1M* camera.

In both cases, the box ends up being rendered by 1 million pixels. So what you have is:

4x the megapixel rating == twice the zoom.

If this is right (someone please check this for me) AND all other things are equal(1), you will get more bang for your buck by going with a bigger zoom.


(1) All things are NOT equal - zoom requires more light and tends to have issues with keeping straight lines straight
devnull is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 5:59 PM.