CurtPalme.com Home Theater Forum

Melifluonze · Posted: Tue Dec 03, 2013 10:39 pm Post subject: G90 10F lenses on a Marquee?

Do the G90 10F lenses fit on the Marquee, or are the mounts different for the G90?

- Melifluonze

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

They bolt right on. I use them on mine and they are awesome.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

I think I have a set lying around.

nashou

Melifluonze · Posted: Wed Dec 04, 2013 2:42 am Post subject:

Would these get rid of the 10L out of focus rings issue when the projector was put up close to a 112" screen?

Yeah, I said corners the first time... what this is is an area about a foot and a half in from the corners of the screen where there is a problem with the focus. It extends like 6 inches in a circle (you could draw a circle joining all the arcs of poor focus in each corner of the screen.)

When I had the projector up before, I tried everything to get rid of it, but it was still there, no matter what. It made me question things, because getting the projector close enough to the screen to fill the tube faces properly meant you had to enter this ring of poor focus on the HD-10L lenses. I think it was Tim that clued me in that it was the lenses.

The corners were in focus, the center was in focus, but there was this place in between that was not...

(am I making sense???)

If I wanted to avoid the ring of "death", I would have had to have moved the projector back some, reducing the rasters. Not cool.

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

**Curt Palme** · Posted: Wed Dec 04, 2013 3:20 pm Post subject:

I agree with JB. You definitely need to get rid of the 10L lenses, they are completely useless with screens over 72`(which explains why I`ve had 3 sets of 10Ls sitting on the shelf for years), but I also agree that your issue may not be lens related. Look into the lenses with subglasses at the tube face, and let us know if the problem is visible on the tube face. Is the problem the same on all 3 tubes in the same area? Can you shift the poor focusing area by shifting the center electronic focus? If so, your problem is electronic, not optical.

Melifluonze · Posted: Wed Dec 04, 2013 6:01 pm Post subject:

"It is in the past!"

This was a while ago. It was not electronic, it was definitely optical. It was almost like a halo in all of the tubes, a ring of area where you just couldn't focus.

Thing was, you could focus the ring out, but then everything else would be slightly out. Yes, I was running a 112" screen. I can't get my head around how the optics work... must be something with the distance you can focus for a given sized screen?

And the 10L seems to have screen size capability larger than 72"... but I dunno... It wasn't horrible, I lived with it for about 6 years and only found it while I was doing an extremely anal calibration one day!

- M