Originally Posted by CAVX
That is a good blog Josh.
Originally Posted by John Schuermann
Josh has always done an excellent job explaining the fundamentals of the CIH concept. This is a great place for anyone to start learning about this aspect of the home theater hobby (no pun intended).
These two articles provided some really informative information to those who are unaware of common height vs common width. I would like to add a few more points that should be mentioned:
1. Speaker placement, the beauty of common height means that the speakers behind the screen will always stay in the same position, when looking at the screen, you will be looking at the exact same "eye-level" spot for both 1:85 or 2:40 features. For those who are building home theater with the speakers behind the screen, you should try to make sure that the L-R speakers are aligned with the edge of the 1:85 screen, not outside the 1:85 area.
2. Masking WILL improve contrast perception.
3. Original SCOPE 2:35 images are higher resolution images than 1:85, there is more light hitting the film frame and when projected the whole frame is used, when SCOPE is viewed on Blu-ray, the SCOPE or 2:40 image becomes the lower resolution image vs 16x9 which is the full resolution, it is almost like a reversal.
4. FLAT or 1:85 should NEVER be projected larger than the 2:40 image, having the 1:85 as being smaller than 2:40 was the intention.