CurtPalme.com Home Theater Forum

_in_peace_ · Joined: 21 Jul 2009 Posts: 152 Location: Sweden

Hello!
Is there a difference between lens for Red and Green?
(In aspect of the angle) 8" HD134

Thanks!

jeffslife · Joined: 17 Apr 2010 Posts: 4190 Location: ohio usa

I swapped them out on my old zenith 900 pro X, using a spare parts machine. It made no difference.But I cant say about other pj's.

_in_peace_ · Joined: 21 Jul 2009 Posts: 152 Location: Sweden

Ok i did a phosphor grain focus test (Thank's Guy Kuo / Brian Smile

) on my new curved screen and the sharpness-angle seems different between the two... And the "sharpness-curve" would fit better if i swap them.

I think i do a swap after all and try it out. The case is that one lens is marked blue and the two others don't have any.

Tom.W · Joined: 09 Mar 2006 Posts: 6635

The lenses should all be the same unless they have built in Red and Green filters.

_in_peace_ · Joined: 21 Jul 2009 Posts: 152 Location: Sweden

After the test i noticed there was no difference also Smile

By the way, the Grain Focus trick is fantastic!

deronmoped · Joined: 03 Nov 2006 Posts: 1154 Location: San Diego

The only difference you will notice in the lenses is, they are not all made the same. In other words they are not sold in matched sets. Where this can be a problem is in convergence. If you are having a issue with convergence, try swapping lenses around to see if that helps the problem. Especially if your running the image out to the edge of the tube.

Deron.