got an annoying issue with m X70, which I hope you might be able to assist me with - I browsed through this thread and found some hints (warming up issues), but I am not sure, whether they really apply here. So thanks for bearing with me, beforehand!
In dark parts of the picture, I do get a huge shift to read - and I mean: huge. It looks like a dark red. Trying to describhe it is hard for me: it is not just some shift towards it, it looks blotchy and like a clearly bordered step (like a IRE-step on a test pattern). So for example in the face of a person in a nightly scene: between the hair and the cheekbone, you will see a big streak/area of dark red between the hair and the lighter parts of the cheekbone, with a clearly distinguishable border and no smooth transition between this darker and the lighter parts. Or, a shot inside a car: big parts of the interior show this darkish red instead of grey, cleary bordererd - everything below a certain IRE-level seems to be red.
I must add, that the x70 has been professionally calibrated (german reknown calibrator cine4home, I bought the "cine4home"-Edition of the X70, after my initial purchase of the X70 suffered from dead pixels and I exchanged it for that version). But no matter, whether I use one of their 2 calibrated settings (one with, one without the green filter in the light path), or the presets like THX or cinema-mode 1 & 2, this red-shift in dark areas is still there. It is also independent of the frame interpolation settings.
I tried to get rid of this color-shift by going into the cutsom gamma settings and tried to manually dial down red gamma for the IRE5-point. As far as I recall, it was set to 56, and I had to dial it down to 20 to get rid of the red. But then I ran into other problems in low light scenes: greyscale was not smooth anymore, I was loosing low end "resolution" of dark scenes completely.
Has anyone of you experienced this before? I must add, that the model, the I currently own, was supposed to be a new unit, but according to the measuring charts, was calibrated June 2012. And the housing seems to have been opened by someone: looking from the front, the left side part of the housing must have been detached, since it was fit back improperly and a little lug was sitting outside the housing instead inside it's counterpart in the other part of the housing and between the parts were stuck some longer orange plastic fibers (I wonder, why they opened it / did the dealer need to repair anything???).
I also have the warming up issue, some users described in this thread: for about 20 minutes, the entire picture has a big red-shift, that makes it quite unwatchable in all modes, that do NOT include the internal green filter (such as THX etc., Cinema modes with the green filter in the light path are way better during warmup).
So, what do you suggest, what I should do / look after?
UPDATE: I found the measuring charts from the calibrator, attaching them for your information, they used HDMI YpbPr (Video), Software: Milori Color Facts CF 7.5 + Calman + "other", Sensor: Gretag MacBeth i1 + "other"Edited by dvdr - 3/6/13 at 3:15am