Handling Mixed Format 2:35 / Imax films - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 14 Old 12-27-2019, 08:26 AM - Thread Starter
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Handling Mixed Format 2:35 / Imax films

How are you guys handling watching mixed aspect ratio films with 2:35 and Imax 16:9 content? I find these to be terribly annoying. They seem to be much more of a gimmick/distraction than a benefit. Is there any computer software out there to crop away the 16:9 content so that you can keep the projector zoomed to fill the 2:35 screen without over spilling the IMAX image off the screen?
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post #2 of 14 Old 12-27-2019, 08:28 AM - Thread Starter
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I supposed mixed format is not the correct naming. I am referring to variable aspect disks.
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post #3 of 14 Old 12-27-2019, 08:40 AM
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Quote:
Originally Posted by Dustin Marmalich View Post
How are you guys handling watching mixed aspect ratio films with 2:35 and Imax 16:9 content? I find these to be terribly annoying. They seem to be much more of a gimmick/distraction than a benefit. Is there any computer software out there to crop away the 16:9 content so that you can keep the projector zoomed to fill the 2:35 screen without over spilling the IMAX image off the screen?
Don't know what projector you have, but I've created two masking presets in my PJ, one for 2.35 and one for 2.20:1 to tackle the mixed ratio madness.

That way I can set the screen masks for either 2.35 or 2.20 and the software masks in the PJ kill any light spill.

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post #4 of 14 Old 12-27-2019, 08:43 AM - Thread Starter
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Originally Posted by markswift2003 View Post
Don't know what projector you have, but I've created two masking presets in my PJ, one for 2.35 and one for 2.20:1 to tackle the mixed ratio madness.

That way I can set the screen masks for either 2.35 or 2.20 and the software masks in the PJ kill any light spill.
Epson 5040UBE. Does it support digital masking?
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post #5 of 14 Old 12-27-2019, 08:51 AM
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Quote:
Originally Posted by Dustin Marmalich View Post
Epson 5040UBE. Does it support digital masking?
Not a clue, but it's worth looking into as it solves the problem perfectly...

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post #6 of 14 Old 12-27-2019, 08:56 AM
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Quote:
Originally Posted by Dustin Marmalich View Post
Epson 5040UBE. Does it support digital masking?
Try "blanking" in the "Signal" Menu...

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post #7 of 14 Old 12-27-2019, 03:39 PM
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Quote:
Originally Posted by Dustin Marmalich View Post
I supposed mixed format is not the correct naming. I am referring to variable aspect disks.
Since I have a Lumagen and a Panamorph DCR lens ( and a scope screen), I just set the aspect ratio in the Lumagen to stay at 2.40:1.
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post #8 of 14 Old 12-27-2019, 09:52 PM
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As long as you have your projector hooked up to a computer, you just need to set the resolution to a 21:9 resolution like 1920x822 and it will always crop 16:9 and 4:3 content with black bars on the sides. Does this help?
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post #9 of 14 Old 12-28-2019, 07:18 AM
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I took the opposite approach and instead of damming the variable AR IMAX movies or the full IMAX movies such as the IMAX enhanced program is producing, I embraced it and sized my screen area to work as an IMAX at home theater. Basically you need a screen area as wide as your scope screen and taller to make it 16:9. It could be argued true IMAX immersion is wider and taller but for me a comfortable IMAX immersion is CIW between IMAX & Scope.

Some people then use a top and bottom masking that is removable for CIH viewing between Scope & Flat. I have a dark gray screen and between the projectors black and the attenuation of the gray screen over spill in the AR changer movies is never an issue for me or my guests.

Just recently we watched (The Aeronauts) Amazon Prime. With friends and after the movie I asked if anyone was distracted by the many AR changes? No one even knew what I was talking about or even noticed. The distraction factor seems to be a learned skill by us amateur projectionists. I quickly unlearned it when I embraced the IMAX format as being here to stay. Watching say Avatar or Dunkirk or The Aeronauts with cropping away the IMAX expanded area IMO changes the movie dramatically. It doesn’t ruin the movie as most were released into scope theaters as scope cropped version, but IMO the premiere experience is the IMAX framing. In fact in the case of Dunkirk I wish we could have got the 1.43:1 version option for home viewing.

This AR/immersion is coming at us from many directions now. Here is Amazon embracing IMAX even. Game of Thrones was even shown in IMAX venues and was widely liked by fans of the show. Again it is only my opinion and not widely liked by most here on the CIH forum but I’m finding some TV that even plays well at increased immersion. Maybe not full IMAX but my guests like most sports more like CIA sized.

Bud
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post #10 of 14 Old 12-30-2019, 01:38 PM - Thread Starter
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Thank you for the replies. Yes, the blanking feature ended up working well. The only caveat is that it is not stored as a lens position memory so you do have to play around with it in between films sometimes.

As far as screen size, I'm already running a 158" screen. I'm pretty much limited by ceiling height at this point since I have 8.5 foot ceilings.

As far as other viewers, I agree, most people don't seem to notice. We watched Dunkirk and out of the 4 total people watching it, I was the only one who noticed the aspect shifting.
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post #11 of 14 Old 12-30-2019, 01:40 PM - Thread Starter
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I agree Imax can look great. I just don't want to hop back and forth between formats in the same movie. It's like using selective color, it's always obnoxious no matter how you do it.
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post #12 of 14 Old 12-30-2019, 01:48 PM
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I have a 2.35:1 screen and turn blanking on and it effectively crops out the top and bottom areas when they change ratio to 16x9.
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post #13 of 14 Old 01-10-2020, 06:27 PM
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Quote:
Originally Posted by m0j0 View Post
I have a 2.35:1 screen and turn blanking on and it effectively crops out the top and bottom areas when they change ratio to 16x9.
This should work as long as all variable AR movies always respect the "safe" region set for 2.35. See this pic I took at CES yesterday of an IMAX camera with the safe framing region in white in the viewfinder screen, at the IMAX Enhanced booth.
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post #14 of 14 Old 01-10-2020, 08:47 PM
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Of course all the new IMAX movies are framed with a safe zone because they are all intended to be shown in the lesser immersive CIH theaters. Safe is not to say the rest of the image is or should be wasted. There is much impact in what you are cropping and the premier presentation should include it. Why would the director take the time to jump back and forth and include some parts as IMAX if he didn’t intend them to be seen. He would just shoot the movie as scope and be done wit it. You can do it just as others would hit the expand/zoom button on their TV and make a scope movie better fill the 16:9 TV. For me both methods reduce the impact of the shot. I have watched almost all of the expanding movies both ways and there is much less impact when cropped to scope.

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