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Topic: Does DLP chip size have an impact on image quality?

Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999

posted 06-14-2013 09:14 PM

Jack,

When you've put in many, many systems across several brands (both projectors and lens manufacturers)...you can see definite trends. Your sample of one theatre is not enough to judge a generalization by.

They ALL have their good and bad batches...nobody is saying the inVision and Fujinon don't have good lenses but their ratio of good-bad is not as good as Minolta.

I don't consider either InVision nor Fujinon "off-brands" myself but you ask ANY installer if you needed "x" size lens and I lined up 10 Minoltas, 10 InVisions and 10 Fujions and based on their lens selection their entire reputation would be judged...just see how many would reach for the Minolta pile versus the others.

Even within the Minoltas, there are better/worse ones as well as High Contrast versus High Brightness (in the Christie line up)...The High Contrast does tend to do well.

For InVision, they are the only ones that have some sizes designed for 4K MTFs.

In fixed focal length lenses (almost always going to be better than variable-focal length), Schneider is there and seems to be better than the other brands too.

As to image vibration...on the Barco B series...it really depends on lens, stability of the floor and projection angle. If things are not to your favor...even a roof-top HVAC system can put a good shake in the image (without you feeling it in the floors/walls)...I've had that. I have some that are just rock solid. They support their entire lens mount from the bottom and it is spring mounted and HAS to have slop to allow for the focus mechanism. Their "fix" for it was to mount a spring loaded ball-bearings to press down on the top. Often one can find a sweet spot on the spring tension to minimize the vibration. Compare that to the focus racks of the other brands.

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Monte L Fullmer
Film God

Posts: 8367
From: Nampa, Idaho, USA
Registered: Nov 2004

posted 06-14-2013 11:40 PM

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