 |
|
 Home
Products
Store
Forum
Warehouse
Contact Us
|
|
|
|
 
|
|
Author
|
Topic: The "Star Wars Camera" gets an upgrade
|
|
|
|
|
|
|
John Pytlak
Film God
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
|
posted 05-29-2003 02:32 PM
Even though the upgraded camera uses less compression in the recording system, it still has much less resolution than 35mm film. Fixed raster sensors usually require an anti-aliasing filter to minimize aliasing artifacts or moire in the image. At a minimum, the resolution is more than halved from the nominal pixel count on the sensor. Here is what John Galt of Panavision had to say on a posting on the Cinematography Mailing List (CML):
CML Posting About CCD Resolution
quote:
A 1920 x 1080 pixel 2/3" CCD has pixels which are 5 x 5 microns in size. If we are not going to upset Mr. Nyquist (create aliased images or moire patterns on fine detail) then the minimum circle of confusion is 10 microns. In practice, because optical low pass filters have slope, just like electronic filters, the real circle of confusion is more like 2.3 pixels or 12 microns. Please remember depth of field is a convenient construct, a rule of thumb. When you focus a lens only a small point in space is truly in focus. Depth of field implies that a certain amount of defocus will be acceptable. Whether this is true or not depends on many factors. Do your own tests for your particular application.
John Galt, Senior Vice President, Advanced Digital Imaging Panavision 6219 De Soto Avenue Woodland Hills CA 91367-2602
So with needed anti-alias filtering, 1920 x 1080 pixel sensors produce less than 960 x 540 lines of resolution, or less than 480 x 270 line pairs (cycles).
Of course, there are many other advantages of film origination:
There's More to the Story
Data Comparing Film and Digital Camera Resolution
35mm Film Resolution Requires at Least 4K Scanning
| IP: Logged
|
|
|
|
|
|
|
|
|
|
All times are Central (GMT -6:00)
|
|
Powered by Infopop Corporation
UBB.classicTM
6.3.1.2
The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion
and agrees to release the authors from any and all liability.
|
|
|
|
Printer-friendly view of this topic