is zooming the same as Vertical stretch ? - AVS Forum
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post #1 of 12 Old 11-04-2010, 09:22 AM - Thread Starter
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I am running a anamorphic lens and I dont have the vertical stretch option on my projector. I notice on my DVD player tho I have some zooming options which makes the image taller.

Is this as good as vertical stretch ? or should I be looking at buying a scaler

Jamie
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post #2 of 12 Old 11-04-2010, 09:42 AM
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I think I saw in another thread that you have an Onkyo receiver. I am currently using my Onkyo TX-SR707 to preform my vertical stretch. On my Onkyo remote (model RC-742M, which is labeled underneath the word "Onkyo" on the remote) there is a button under the volume control and it is labeled "Video". When pushed, "Resolution: Auto" appears on the screen (since I allow my receiver to choose the best resolution for me), you then use the up or down buttons of the "Playlist/Category" selector (round button in the middle of the remote with the "Enter" button in the middle of it). Go through the selections ("Game Mode", "Hue", "Saturation", etc.) until you come to the "Zoom" option. Use the left/right buttons of the "Playlist/Category" selector to choose different types of zoom. The correct one is plain old "Zoom", NOT "Wide Zoom" or "Normal" or any of the others, just "Zoom". It does the vertical stretch for you, removing the black bars.

-Sean
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post #3 of 12 Old 11-04-2010, 10:43 AM - Thread Starter
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Thanks dude!!
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post #4 of 12 Old 11-04-2010, 11:24 AM
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No prob, let me know if that worked for you as I'm not sure if all Onkyo receivers are capable.

-Sean
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post #5 of 12 Old 11-04-2010, 12:18 PM
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Here's a list of the other threads/questions for reference in trying to help

How Do I know which lens will work with my 8500UB:
http://www.avsforum.com/avs-vb/showt...305&highlight=

I have an 8500UB and want to add an anamorphic lens:
http://www.avsforum.com/avs-vb/showthread.php?t=1285943

Ok so you havent got powered zoom, what other hardware options are there?
http://www.avsforum.com/avs-vb/showt...238&highlight=

Must mount projector with lens centre to my 2.35.1 screen so I can zoom 2 fill screen
http://www.avsforum.com/avs-vb/showt...636&highlight=

I have maxed zoomed to fill my 2.35.1 screen and the image seems soft is this normal
http://www.avsforum.com/avs-vb/showt...734&highlight=

2.35.1 image looks a bit soft and seeing alot of pixels
http://www.avsforum.com/avs-vb/showt...268&highlight=

I dont have powered zoom is it possible for a dvd player to do it ?
http://www.avsforum.com/avs-vb/showt...002&highlight=

I've got a few questions before I install my anamorphic lens
http://www.avsforum.com/avs-vb/showthread.php?t=1287481

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post #6 of 12 Old 11-04-2010, 05:16 PM
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Quote:
Originally Posted by jamieuk147 View Post

I am running a anamorphic lens and I dont have the vertical stretch option on my projector. I notice on my DVD player tho I have some zooming options which makes the image taller.

Is this as good as vertical stretch ? or should I be looking at buying a scaler

Jamie

I think there is some merit for scaling at the source. I did some testing using a PC running HD and whilst the difference between scaling at the source Vs running letterbox and Vertical Stretching at the projector was small (if at all noticeable), I felt it looked slightly better when done at the source. So I think this is where players like OPPO have a clear advantage over others. Of course a good Video Processor should deliver the same (or even better) results.

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post #7 of 12 Old 11-07-2010, 09:24 AM
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Quote:
Originally Posted by jamieuk147 View Post

I am running a anamorphic lens and I dont have the vertical stretch option on my projector. I notice on my DVD player tho I have some zooming options which makes the image taller.

Is this as good as vertical stretch ? or should I be looking at buying a scaler

Jamie

If you are using an anamorphic lens you have to stretch...no getting around it. Zooming is done for those who don't use a lens, but want a native 2.35:1 screen.
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post #8 of 12 Old 11-08-2010, 07:48 PM
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Quote:
Originally Posted by rboster View Post

Here's a list of the other threads/questions for reference in trying to help

How Do I know which lens will work with my 8500UB:
http://www.avsforum.com/avs-vb/showt...305&highlight=

I have an 8500UB and want to add an anamorphic lens:
http://www.avsforum.com/avs-vb/showthread.php?t=1285943

Ok so you havent got powered zoom, what other hardware options are there?
http://www.avsforum.com/avs-vb/showt...238&highlight=

Must mount projector with lens centre to my 2.35.1 screen so I can zoom 2 fill screen
http://www.avsforum.com/avs-vb/showt...636&highlight=

I have maxed zoomed to fill my 2.35.1 screen and the image seems soft is this normal
http://www.avsforum.com/avs-vb/showt...734&highlight=

2.35.1 image looks a bit soft and seeing alot of pixels
http://www.avsforum.com/avs-vb/showt...268&highlight=

I dont have powered zoom is it possible for a dvd player to do it ?
http://www.avsforum.com/avs-vb/showt...002&highlight=

I've got a few questions before I install my anamorphic lens
http://www.avsforum.com/avs-vb/showthread.php?t=1287481

Something wrong with my computer? None of these links work for me. I can look them up...just wondering.
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post #9 of 12 Old 11-08-2010, 11:58 PM
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Quote:
Originally Posted by greg_mitch View Post

Something wrong with my computer? None of these links work for me. I can look them up...just wondering.

Here is an example of Letter Boxing as it appears on the BD/DVD.

And then the same image after Vertical Stretch has been applied.

Hope that helps.
LL
LL

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post #10 of 12 Old 11-09-2010, 05:52 AM
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Yes...that looks bad. IMHO.
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post #11 of 12 Old 11-09-2010, 09:21 AM
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Quote:
Originally Posted by greg_mitch View Post

Yes...that looks bad. IMHO.

Its supposed to look distorted, then the A-lens is placed in the light path and stretches it out horizontally, restoring the proper shape.

-Sean
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post #12 of 12 Old 11-09-2010, 03:48 PM
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Quote:
Originally Posted by 230-SEAN View Post

Its supposed to look distorted, then the A-lens is placed in the light path and stretches it out horizontally, restoring the proper shape.

-Sean

Yes. Sorry I think I was mixing some threads I had open at the same time. I thought this was referring to using stretch in lieu of an A-lens.

I understand how the A-lens works.

Thanks for clarifying.
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