Video processor vs A-lens - AVS Forum | Home Theater Discussions And Reviews
Baselworld is only a few weeks away. Getting the latest news is easy, Click Here for info on how to join the newsletter list. Follow our team for updates featuring event coverage, new product unveilings, watch industry news & more!

Forum Jump: 
Thread Tools
Old 05-17-2012, 01:15 PM - Thread Starter
AVS Special Member
Pain Infliction's Avatar
Join Date: Jun 2010
Location: Houston Texas
Posts: 4,281
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 978 Post(s)
Liked: 505
I am wondering why people use an A-lens and not a video processor. Is their advantages of an a-lens or disadvantages with a processor to get 2.35 image? Website Design Professionals

The Thompson Theater

RIP William Alexander
Pain Infliction is offline  
Sponsored Links
Old 05-31-2012, 04:10 PM
AVS Special Member
[Irishman]'s Avatar
Join Date: Nov 2007
Posts: 1,696
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 173 Post(s)
Liked: 118
I'm interested in this reply as well. I've seen at least one new projector that features both X and Y zooming that's supposed to preclude the need for anamorphic lens at all.

COMING SOONFinding the Ark of the Covenant by Brian Roberts, in the iBook Store on iTunes, a new investigation into the Hebrew’s Most Sacred Relic!
[Irishman] is offline  
Old 06-01-2012, 08:12 AM
AVS Addicted Member
Josh Z's Avatar
Join Date: Jul 2002
Location: Planet Boston, source of the spice, Melange.
Posts: 22,324
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 1969 Post(s)
Liked: 1334
The video processor works in conjunction an anamorphic lens. The processor on its own cannot change a projector's fixed 16:9 pixel grid. All it can do is manipulate the image within that grid. The lens stretches the pixels horizontally into a 2.35:1 shape. Then the processor (or a CIH mode in the projector) crops out the letterbox bars and stretches the image back into proper geometrical proportion.

Josh Z
Writer/Editor, High-Def Digest (Blog updated daily!)
Curator, Laserdisc Forever

My opinions are my own, and do not necessarily reflect those of my employers.

Josh Z is offline  
Old 06-01-2012, 09:47 AM
AVS Addicted Member
stanger89's Avatar
Join Date: Nov 2002
Location: Marion, IA
Posts: 20,630
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 2116 Post(s)
Liked: 978
To put it another way, it is impossible to do what an anamorphic lens does electronically.

An anamorphic lens changes the shape of the light coming out of the projector. With a 16:9 (1.78:1) projector, it will change the shape of the projected light from 1.78:1 to 2.37:1. Effectively it makes the projector a scope (2.37:1) projector.

This is a physical process, there is no way electronically to affect the shape of the light coming out of the projector.

And before anyone jumps on me, I'm talking very specifically about the function the lens actually performs, not how to achieve displaying scope content in general, there are several ways to display scope content, but there is only one way to actually change the shape of the projected light.
stanger89 is offline  
Sponsored Links
Thread Tools

Forum Jump: 

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