DIY anamorphic lens - Page 102

Mark Techer · 23rd October 2006, 11:57 AM

Quote:

Originally posted by mbonikow

Mark, great work!!!
I think we emailed a few times about liwuzen lens back a while ago, whatever happened to that??? It felt like it got canned by the AVS moderators. Maybe it was infringing on the Prismasonic and Panamorph territory... It seemed promising.

Thanks, I've had fun along the way

Luiwzen's lens is a great product. A little too restrictive for my needs (still needs TR of at least 1.7 or greater) but has full optic coating etc. The price was good too, but his big mistake was to discuss prices and sales inquiries on the AVS site.

AVS is a business after all, so any financial discussions are supposed to go through them and he did not do that. The fee for a powerbuy is a fair amount too, even if it is aimed directly at the target audience, means that you need to make quite a turn over of product or have high prices, or both...

Maybe both Prisms based lenses did feel a slight sting...

Mark

D_B_0673 · 23rd October 2006, 12:22 PM

Now that we have (or soon to have) the lens made, can any of you DIY'ers think of how to automate the movement of the lens.
I was thinking of perhaps a small linear actuator, 4 or 5" throw.

I have seen some that have interanal limit switches and are DC

But how do we make it to respond to an IR remote.

Any thoughts appreciated

artbypaul · 23rd October 2006, 01:19 PM

It's kind of difficult to tell from the photo, but I ended up taping up HALF of the rear prism. It REALLY helped cutting off the rear-reflection I was getting on the back wall of the closet my projector is in. I used a piece of card board and slid it in front of the back prism to the point just before it interfered with the light path, then taped it up.

I used both black electric tape and black duct tape. I intentionally wrapped the first layer with black electric tape to have the black on the inside as I thought the white sticky part of the duct tape might be too light on the inside of the prisms. It probably didn't matter but I worried about loss of contrast with the light illuminating the lighter tape inside.

And one more screen shot for good measure...

By the way, this is a paused image through a SONY DVP-NS55P DVD player using the progressive through component.

I was using the LG DN191H player but it wouldn't play my IMAX DVDs for some reason. It also looked horrible through HDMI/DVI connection and the picture on the Sony looks smoother to me.

I'll wait and see which direction the Blu-Ray/HD-DVD goes before I commit to one or the other. Right now, I'm extremely happy with the image quality I'm getting with normal DVD.

FYI- The IMAX DVD "The Living Sea" is shot 2.35:1 scope and is AWESOME with the lens set up. The music is by STING and it's beautiful.

mbonikow · 23rd October 2006, 04:53 PM

Thanks guys, good to see you are still at it! Where are you getting them in Ontario then?

I did some reading on that French cinema site. Afterwards I found a few manufacturing companies that produce BK7 glass prisms in larger sizes.
check out this place for example:

http://www.escoproducts.com/products...gle-prisms.php

Now, granted this is a right angle prism, but I see no reason why they would not produce an anamorphic one in our sizes.

For some reason anamorphic prisms seem to come only in small sizes (around 15mm) I guess they don't need them bigger in lab situations. Still I think getting BK7 multicoated prisms for around $150 could be possible. How would they compare to the crystal wedges is for you guys to decide

I think that is what the cinema.fr did, they just got them custom made. Their first batch is arriving as we speak, should be interesing what type of results they get...

Mike

roar · 23rd October 2006, 04:59 PM

Mike, I replied to you via email, you've got all the info I've got now!

Bud Bray · 23rd October 2006, 05:02 PM

Hey ROAR, got your prisms all set up yet???
Wanna drop by & see it.

roar · 23rd October 2006, 05:04 PM

You bring the flashlight bud, so we have something to shine through them

No the prisms are sitting on the table next to the BOC morkys hooked me up with just waiting for that projector... here is hoping it is a happy christmas at my place this year

Bud Bray · 23rd October 2006, 05:11 PM

You think you can actually wait till CHRISTMAS? WOW...you have PATIENCE!
Oh, think I read somewhere...CHRISTMAS is CANCELLED this year!

artbypaul · 23rd October 2006, 05:13 PM

Quote:

Originally posted by Bud Bray
You think you can actually wait till CHRISTMAS? WOW...you have PATIENCE!
Oh, think I read somewhere...CHRISTMAS is CANCELLED this year!

The Home Theater Grinch has spoken! LOL!

Bud Bray · 23rd October 2006, 05:14 PM

Hey, thought you were going with the acoustic fabric?

23rd October 2006, 12:22 PM	#1012
D_B_0673 diyAudio Member Join Date: Oct 2006	Next step in this plan Now that we have (or soon to have) the lens made, can any of you DIY'ers think of how to automate the movement of the lens. I was thinking of perhaps a small linear actuator, 4 or 5" throw. I have seen some that have interanal limit switches and are DC But how do we make it to respond to an IR remote. Any thoughts appreciated

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23rd October 2006, 01:19 PM	#1013
artbypaul diyAudio Member Join Date: Oct 2006	It's kind of difficult to tell from the photo, but I ended up taping up HALF of the rear prism. It REALLY helped cutting off the rear-reflection I was getting on the back wall of the closet my projector is in. I used a piece of card board and slid it in front of the back prism to the point just before it interfered with the light path, then taped it up. I used both black electric tape and black duct tape. I intentionally wrapped the first layer with black electric tape to have the black on the inside as I thought the white sticky part of the duct tape might be too light on the inside of the prisms. It probably didn't matter but I worried about loss of contrast with the light illuminating the lighter tape inside. And one more screen shot for good measure... By the way, this is a paused image through a SONY DVP-NS55P DVD player using the progressive through component. I was using the LG DN191H player but it wouldn't play my IMAX DVDs for some reason. It also looked horrible through HDMI/DVI connection and the picture on the Sony looks smoother to me. I'll wait and see which direction the Blu-Ray/HD-DVD goes before I commit to one or the other. Right now, I'm extremely happy with the image quality I'm getting with normal DVD. FYI- The IMAX DVD "The Living Sea" is shot 2.35:1 scope and is AWESOME with the lens set up. The music is by STING and it's beautiful.

23rd October 2006, 04:53 PM	#1014
mbonikow diyAudio Member Join Date: Oct 2006	Thanks guys, good to see you are still at it! Where are you getting them in Ontario then? I did some reading on that French cinema site. Afterwards I found a few manufacturing companies that produce BK7 glass prisms in larger sizes. check out this place for example: http://www.escoproducts.com/products...gle-prisms.php Now, granted this is a right angle prism, but I see no reason why they would not produce an anamorphic one in our sizes. For some reason anamorphic prisms seem to come only in small sizes (around 15mm) I guess they don't need them bigger in lab situations. Still I think getting BK7 multicoated prisms for around $150 could be possible. How would they compare to the crystal wedges is for you guys to decide I think that is what the cinema.fr did, they just got them custom made. Their first batch is arriving as we speak, should be interesing what type of results they get... Mike

23rd October 2006, 04:59 PM	#1015
roar diyAudio Member Join Date: Jul 2006	Mike, I replied to you via email, you've got all the info I've got now!

23rd October 2006, 05:02 PM	#1016
Bud Bray diyAudio Member Join Date: Feb 2006 Location: Burlington,Ontario	Hey ROAR, got your prisms all set up yet??? Wanna drop by & see it.

23rd October 2006, 05:04 PM	#1017
roar diyAudio Member Join Date: Jul 2006	You bring the flashlight bud, so we have something to shine through them No the prisms are sitting on the table next to the BOC morkys hooked me up with just waiting for that projector... here is hoping it is a happy christmas at my place this year

23rd October 2006, 05:11 PM	#1018
Bud Bray diyAudio Member Join Date: Feb 2006 Location: Burlington,Ontario	You think you can actually wait till CHRISTMAS? WOW...you have PATIENCE! Oh, think I read somewhere...CHRISTMAS is CANCELLED this year!

23rd October 2006, 05:14 PM	#1020
Bud Bray diyAudio Member Join Date: Feb 2006 Location: Burlington,Ontario	Hey, thought you were going with the acoustic fabric?

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