Go Back   Steve's Digicams Forums > Digital Cameras (Point and Shoot) > Sony

Thread Tools Search this Thread
Old Jan 18, 2007, 9:25 AM   #1
Join Date: Jan 2007
Posts: 35

The H5 has a 2x digital zoom and the Canon S3 has a 4x digital zoom. How much of a difference does that 4x zoom make?
lmn927 is offline   Reply With Quote
Sponsored Links
Old Jan 18, 2007, 2:06 PM   #2
Senior Member
Sintares's Avatar
Join Date: Jul 2005
Posts: 647

Ignore the digital (precision) zoom.

The standard digital zoom is pointless, it degrades the picture.

Basically the centre of the image is cropped out and then increased back up to whatever the resolution the camera is set to.

Since the cropped part has less pixels than the full area, the "space" is filled with false pixels, calculated by comparing the adjacent pixels and guessing what should go into the space.

The H5 also has a "smart" zoom.

You set the camera to a lower resolution, ie 3mp or 5mp etc , the camera uses the full resolution and crops the centre out to correspond to the lower resolution as you zoom in, as a result the "zoom" is increased , or at least appears to as the cropped picture fills the screen.

Since the resultant pixels are real, and no pixels are made up the result is much better than traditional zoom though obviously the picture has less pixels and lower resolution so can be used for smaller prints and less cropping in post processing can be done without losing too many pixels.

However if you were to take the picture at full resolution , import into an editor and then simply crop the centre out, you would get the same result..

The only real difference is when the camera does the cropping it crops the straight digital data and then saves as a jpeg.

Doing the editing yourself would involve editing an image which is already a jpeg ie compressed and then saving it, so if it was resaved as a jpeg even more quality would be lost.

Sintares 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 Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 3:45 AM.