Incredibly Small Active CCD Sizes at DVinfo.net

Go Back   DV Info Net > And Now, For Something Completely Different... > Still Crazy

Still Crazy
You say you want resolution? The whole world is watching these digicams.


Reply
 
Thread Tools Search this Thread
Old September 19th, 2006, 08:33 PM   #1
Major Player
 
Join Date: Oct 2004
Location: Eugene, Oregon
Posts: 903
Incredibly Small Active CCD Sizes

When the cameras that have the "Smart Zoom" or "Extended Optical Zoom" feature, shrink their active CCD sectors to produce images with lower pixel-sizes, they get really small. For a camera with 7 Megapixels and a .4-inch CCD size, I made some calculations to determine how much active area is being used for the various resolutions:

7 MP: .4-inch diagonal measure CCD sector, with a .077 sq.in. area
5 MP: .353-inch CCD sector, with a .06 sq. in. area
3 MP: .285-inch CCD sector, with a .036 sq. in. area
2 MP: .226-inch CCD sector, with a .024 sq. in. area
640 X 480 (VGA): .089-inch CCD sector, with a .0068 sq. in. area

The figures for the CCD sector sizes are calculated to allow for the approximately 10% extra pixels that are inactive. The 640 X 480 sector's diagonal measure is only about 1/12th-inch. The CCD of my first 640 X 480 camcorder, has a sensing area about 71 times greater than this.

The Smart Zoom, in its various forms by different manufacturers, can be turned off, so you don't have to deal with the ridiculously-high 57X zoom in 640 X 480, if you don't want it. It'll be interesting to see what kind of quality you might get when shooting with such a tiny CCD sector. Also, this feature shifts gradually off, as you zoom back into the wide end, so you get the full wide angle of view.

Last edited by J. Stephen McDonald; September 20th, 2006 at 04:47 AM.
J. Stephen McDonald is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > And Now, For Something Completely Different... > Still Crazy

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 06:21 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network