CurtPalme.com Home Theater Forum

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6319 Location: Australia

I spent a lot of time working on my astig and both mechanical and electronic focus, there was never any trick photography used. It was basically digital sharp at 1920x1080p

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

I did the main astig zones on red and green. The zones that are really over the edge I left alone might work on those later. Also I did not do much on blue but it might bring more colour uniformity over the screen when I do blue to. Oh and I did not do anything yet with the 6-poles. Did you work on the 6-pole does it pay off? My dots seemed pretty round but perhaps in some edges the 6 pole could improve. I love how very stable this focussing mechanism works on the barco to get everything 100% in control if your taking the time to.

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

Next thing I will go back to the Marquee and see how she works. I have no idea yet. On the mechanical part I noticed that the barco astig magnets turned easy and steady while the Marquee magnets slipped a lot. Also the centering of the focus yoke is difficult to work with for a beginner but it might be of some benefit. To be honest I think I will have to replace the yokes with the barco yokes if I want to ever get anywhere. But that is not so difficult.

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6319 Location: Australia

I did the lot yes.

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6319 Location: Australia

I did the lot yes.

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

Doing the 6 pole is first and foremost the biggest improvement you can do for a nice tight spot beam.

If the grid moves when ramping focus up and down you have to re visit the two pole magnet ring.

Athanasios

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

I looked at the barco service manual and they say:

Dynamic Astigmatism
Use Menu>Service>Common Settings>Dynamic Astigmatism>Genlocked Pattern
Play around with the SHARPNESS-keys (over-focus) and CONTRAST for best visibility
Adjust all areas for most circular dots (use 6-poles if they seem to be triangular)
Aim is to get best focus around value 57 (Sharpness/Focus-buttons)

I did not see triangles so I left the 6-pole but I guess close inspection might disclose some triangles Wink

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

Adjusting the Color Purity Control magnets perfectly will relieve stress on the electronic astig and focus circuits.

I myself have to get the 2 pole adjusted on my Twins.

Francisco · Joined: 05 Apr 2007 Posts: 305 Location: The Netherlands

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

Here is the 1:1 of my modified Marquee. I know Strid has posted much better 1:1 but he told me he never watches a movie with those as the slightly lower bandwidth looks better so says Mike. Think to much bandwidth is to noisy.

When I compare with the 1:1 Francisco posted of his 909 they seem very similar.

I know the 1:1 is not everything and I had to do hard work to get the focus comparable to the Barco Cinemax but I now have the feeling I am as sharp but I do not get clear scanlines however hard I try. That must be because I do not have lug tubes. It does not show in the picture to me. I do see clearly the 1:1 pixel lines. Perhaps a bit clearer on the Cinemax.

I do have to add that compared to my unmodified Cinemax I very much prefer the modified Marquee. Details are much sharper and I see amazing blacklevels.

Still I feel like modifying the Cinemax in the near future Cool

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

Depends on what stock board you compare with. Some look almost the same but than there is a lot of peaking on them. When replacing the parts with high bandwidth parts they look better but when the peaking is changed they look the same again. But some look very worse. I think it is possible to make the 1:1 look better but I think that will not make the picture look better.

Have to add I have a vim02 with mini board and modified Moome in the chain. I think it will never get perfect 1:1 even with perfect neckboards but I do not see that as a problem as was explained to me.