DIY anamorphic lens - Page 174

artbypaul · 1st August 2008, 02:10 PM

I was always under the impression that BLU-RAY could not be used with a Constant Height set up. However, my new Optoma projector vertically stretches 2.35:1 or wider (letterboxed) movies! It looks just like my old DVD player when I used it for constant height. So I'm guessing it CAN work with Blu-Ray now?

I do realize that TRUE Anamorphic encoding means all of the pixels are used to begin with in the 16:9 native aspect (1920x1080). So I'd be actually stretching a 1920x800 pixel image, correct?

Please let me know if you think this will actually look okay. I'm figuring my old 480p or 780p constant height looked awesome, so the 1920x800 should look just as good if not better.

Any input would be appreciated.

THANKS!
Paul

Mark Techer · 1st August 2008, 02:56 PM

Quote:

Originally posted by artbypaul
[B]I was always under the impression that BLU-RAY could not be used with a Constant Height set up. However, my new Optoma projector vertically stretches 2.35:1 or wider (letterboxed) movies! It looks just like my old DVD player when I used it for constant height. So I'm guessing it CAN work with Blu-Ray now?

I bought the BenqW5000 because the "letter box" and "4x3" modes are the 2 that are needed for CIH. This works for HD over HDMI. The are a few projectors that now do this and I have started on a list on my site of units that I have actually tested for CIH...

Quote:

I do realize that TRUE Anamorphic encoding means all of the pixels are used to begin with in the 16:9 native aspect (1920x1080). So I'd be actually stretching a 1920x800 pixel image, correct?

With a TRUE anamorphic title, your image is made from 1920 x 1080 and is "tall and thin" - usually horizontally squeezed like film but at 25% not 50%. You NEED an anamorphic lens to view this program or it will be geometry incorrect - sorry 16:9 crowd :P

So instead of wasting 25% on black bars and having to vertically stretch as we do now (we actually zoom in a 4 x 3 mode, but that is another story), we would actualy use the 16:9 mode and have to use an anamorphic lens to optically correct the geometry...

Quote:

Please let me know if you think this will actually look okay. I'm figuring my old 480p or 780p constant height looked awesome, so the 1920x800 should look just as good if not better.

Any input would be appreciated.

THANKS!
Paul

CIH at 1080 with HD as the source needs to be seen to be believed - I love mine and why I am wanting an even better lens...

I've been using HD DVD up until now, but will get a BD player this month sometime - I thinking the Samsung BD1500...

Mark

artbypaul · 1st August 2008, 03:58 PM

Awesome! Thanks so much for the detailed answers, Mark! I now have decide which lens to go with. I may wait and see how much the cylindrical type ends up being. I was really happy with my old set up but after watching movies with the Blu-Ray player I think I may notice the lack of focus and uniformality in the 2 lens set up.

Paul

Mark Techer · 2nd August 2008, 01:15 AM

Quote:

Originally posted by artbypaul
Awesome! Thanks so much for the detailed answers, Mark! I now have decide which lens to go with. I may wait and see how much the cylindrical type ends up being. I was really happy with my old set up but after watching movies with the Blu-Ray player I think I may notice the lack of focus and uniformality in the 2 lens set up.

Paul

You may, but I found the increase in sharpness from the source to counter the effects. It was not until I got to compare cylindrical to prisms lenes that saw the real benifits of edge to edge "focus"...

Mark

artbypaul · 6th August 2008, 12:03 PM

Sounds good, Mark.

My lenses should be here today, I had them shipped overnight.

This will be the biggest 2.37:1 screen I've had since my new projector projects a larger image from the same throw distance as my old one. It's right at 12 feet diagonal.

I hope to have actual screen shots later today...

Paul

Mark Techer · 6th August 2008, 01:23 PM

That is one good looking room Paul. I bet you missed using that...

Mark

artbypaul · 6th August 2008, 02:41 PM

You are so correct, Mark!

I'm patiently waiting for the delivery truck to pull up in front of my house.

Mark Techer · 6th August 2008, 03:06 PM

Well I have all but given away the prisms as Cylindricals are soooo much better

Mark

artbypaul · 6th August 2008, 06:42 PM

They must be unbelievable if they're that much better than the prism wedges!

I just set mine up again and I'm blown away by the Blu-Ray image stretched.

Just a quick photo.

I'm in CinemaScope Heaven again!

Paul

Karol N. · 6th August 2008, 09:22 PM

Hi Paul,

congratulations to your new CIH setup

Are you using a DIY anamorphic lense to achieve these results?

6th August 2008, 01:23 PM	#1736
Mark Techer diyAudio Member Join Date: Aug 2005	That is one good looking room Paul. I bet you missed using that... Mark __________________ CIH Explained

6th August 2008, 03:06 PM	#1738
Mark Techer diyAudio Member Join Date: Aug 2005	Well I have all but given away the prisms as Cylindricals are soooo much better Mark __________________ CIH Explained

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1st August 2008, 02:10 PM	#1731
artbypaul diyAudio Member Join Date: Oct 2006	I was always under the impression that BLU-RAY could not be used with a Constant Height set up. However, my new Optoma projector vertically stretches 2.35:1 or wider (letterboxed) movies! It looks just like my old DVD player when I used it for constant height. So I'm guessing it CAN work with Blu-Ray now? I do realize that TRUE Anamorphic encoding means all of the pixels are used to begin with in the 16:9 native aspect (1920x1080). So I'd be actually stretching a 1920x800 pixel image, correct? Please let me know if you think this will actually look okay. I'm figuring my old 480p or 780p constant height looked awesome, so the 1920x800 should look just as good if not better. Any input would be appreciated. THANKS! Paul

1st August 2008, 03:58 PM	#1733
artbypaul diyAudio Member Join Date: Oct 2006	Awesome! Thanks so much for the detailed answers, Mark! I now have decide which lens to go with. I may wait and see how much the cylindrical type ends up being. I was really happy with my old set up but after watching movies with the Blu-Ray player I think I may notice the lack of focus and uniformality in the 2 lens set up. Paul

6th August 2008, 12:03 PM	#1735
artbypaul diyAudio Member Join Date: Oct 2006	Sounds good, Mark. My lenses should be here today, I had them shipped overnight. This will be the biggest 2.37:1 screen I've had since my new projector projects a larger image from the same throw distance as my old one. It's right at 12 feet diagonal. I hope to have actual screen shots later today... Paul

6th August 2008, 02:41 PM	#1737
artbypaul diyAudio Member Join Date: Oct 2006	You are so correct, Mark! I'm patiently waiting for the delivery truck to pull up in front of my house.

6th August 2008, 06:42 PM	#1739
artbypaul diyAudio Member Join Date: Oct 2006	They must be unbelievable if they're that much better than the prism wedges! I just set mine up again and I'm blown away by the Blu-Ray image stretched. Just a quick photo. I'm in CinemaScope Heaven again! Paul

6th August 2008, 09:22 PM	#1740
Karol N. diyAudio Member Join Date: Jun 2008	Hi Paul, congratulations to your new CIH setup Are you using a DIY anamorphic lense to achieve these results?

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