DIY anamorphic lens - Page 182

noah katz · 31st December 2008, 03:45 AM

If I wanted a 2.05 vertical compression lens (to split the difference between 16:9 and 2.35), could I do it by taking a Panamorph and changing the angle between the prisms?

Mark Techer · 31st December 2008, 05:35 AM

You could, but you might also try simply changing the angle of the tilt of the lens itself. What I found was that the amount of compression could be changed, but I did not bother to measure the exact limits.

The same goes for HE lenses where by rotating the lens, the stretch can be expanded or reduced to get the exact 33% required...

Mark

noah katz · 31st December 2008, 06:16 AM

"you might also try simply changing the angle of the tilt of the lens itself."

I asked at AVS Forum and a Panamorph owner says it effects the geometric distortion but not the compression.

To be clear, by "You could" do you mean I could try it, or that understand the optics and know for a fact that it would change the compression ratio?

Mark Techer · 2nd January 2009, 08:16 AM

Quote:

Originally posted by noah katz
"you might also try simply changing the angle of the tilt of the lens itself."

I asked at AVS Forum and a Panamorph owner says it effects the geometric distortion but not the compression.

To be clear, by "You could" do you mean I could try it, or that understand the optics and know for a fact that it would change the compression ratio?

If it is changing the geometry, then it IS changing the compression...

Mark

philpods · 4th January 2009, 02:18 AM

Ive read through most of the posts on here and wow, you guys have come a long way. Think i might just jump on the CIH bandwagon. Is it worth just getting some trophy glass and having a crack? Or are there better results to be had another way.
Phil.

Mark Techer · 6th January 2009, 05:00 PM

Skip the liquid filled prisms

The trophies are a good place to start to see how you like CIH, then you can look into other options (more expensive no less)...

Mark

mikedolphin · 23rd January 2009, 03:36 AM

Hello everyone, this is a great thread on Anamorphic Lens!

Since I am a DIY person, I am interested in making a DIY Anamorphic lens. Looks like I found the right place to learn.

I found a supplier of optical crystal wedges, and was woundering if they would work.

website:
http://www.precisioncrystal.com/cata...tal-wedge.html[/URL]

Let me know if they will, price is very reasonable.

Thanks
Mike

Mark Techer · 24th January 2009, 01:48 AM

Yes the 4 x 6"are a popular choice on this forum...

Mark

mikedolphin · 24th January 2009, 07:20 PM

Mark
Thanks for the reply.

I will order a couple and see how it goes

Thanks

Mike

Mark Techer · 7th February 2009, 04:32 AM

So how did you go?

Mark

31st December 2008, 03:45 AM	#1811
noah katz diyAudio Member Join Date: Jul 2004 Location: Mountain View, CA	If I wanted a 2.05 vertical compression lens (to split the difference between 16:9 and 2.35), could I do it by taking a Panamorph and changing the angle between the prisms? __________________ ----------------------------------------- Noah

31st December 2008, 05:35 AM	#1812
Mark Techer diyAudio Member Join Date: Aug 2005	You could, but you might also try simply changing the angle of the tilt of the lens itself. What I found was that the amount of compression could be changed, but I did not bother to measure the exact limits. The same goes for HE lenses where by rotating the lens, the stretch can be expanded or reduced to get the exact 33% required... Mark __________________ CIH Explained

31st December 2008, 06:16 AM	#1813
noah katz diyAudio Member Join Date: Jul 2004 Location: Mountain View, CA	"you might also try simply changing the angle of the tilt of the lens itself." I asked at AVS Forum and a Panamorph owner says it effects the geometric distortion but not the compression. To be clear, by "You could" do you mean I could try it, or that understand the optics and know for a fact that it would change the compression ratio? __________________ ----------------------------------------- Noah

4th January 2009, 02:18 AM	#1815
philpods diyAudio Member Join Date: Jan 2009	sources Ive read through most of the posts on here and wow, you guys have come a long way. Think i might just jump on the CIH bandwagon. Is it worth just getting some trophy glass and having a crack? Or are there better results to be had another way. Phil.

6th January 2009, 05:00 PM	#1816
Mark Techer diyAudio Member Join Date: Aug 2005	Skip the liquid filled prisms The trophies are a good place to start to see how you like CIH, then you can look into other options (more expensive no less)... Mark __________________ CIH Explained


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23rd January 2009, 03:36 AM	#1817
mikedolphin diyAudio Member Join Date: Dec 2008	Hello everyone, this is a great thread on Anamorphic Lens! Since I am a DIY person, I am interested in making a DIY Anamorphic lens. Looks like I found the right place to learn. I found a supplier of optical crystal wedges, and was woundering if they would work. website: http://www.precisioncrystal.com/cata...tal-wedge.html[/URL] Let me know if they will, price is very reasonable. Thanks Mike

24th January 2009, 01:48 AM	#1818
Mark Techer diyAudio Member Join Date: Aug 2005	Yes the 4 x 6"are a popular choice on this forum... Mark __________________ CIH Explained

24th January 2009, 07:20 PM	#1819
mikedolphin diyAudio Member Join Date: Dec 2008	Mark Thanks for the reply. I will order a couple and see how it goes Thanks Mike

7th February 2009, 04:32 AM	#1820
Mark Techer diyAudio Member Join Date: Aug 2005	So how did you go? Mark __________________ CIH Explained

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