Water and oil anamorphic prisms

Keith Kline · April 13th, 2005, 06:56 PM

I'll post some pics tonight of the way I had it set up. I also have a new rear prism about 1/2 done with a different angle in the prism.

With the larger angle prism it would only work with the prism points facing towards the front of the camera. I'll post some pics tonight so you can see what I was saying.

Keith Kline · April 13th, 2005, 09:27 PM

Bottom of the page...

http://www.twistedinsomniac.com/mini35/

Oscar Spierenburg · April 14th, 2005, 04:35 AM

I checked my prisms, but just by looking through them does not make you think it's stretching that much, so are you sure the first setup is doing nothing? I just don't understand. Try looking at something square.

Also (I know it as just a quick test), but notice that there is color aberration in your picture so you have to place the prisms in a smaler angle (to each other and the camera lens) There is just one angle where the aberration is gone.

Leo Mandy · April 14th, 2005, 04:21 PM

Keith you are making awesome progress! Good for you, I would love to see more. How did you come up with the Wax technique?

Keith Kline · April 14th, 2005, 05:06 PM

<<<-- Originally posted by Mandy Leo : Keith you are making awesome progress! Good for you, I would love to see more. How did you come up with the Wax technique? -->>>

Thanks. It's getting there. I based the wax glass on the ideas I got from this thread...

http://www.dvinfo.net/conf/showthrea...threadid=33489

It's slowly but surely getting there.

Keith Kline · April 14th, 2005, 05:08 PM

Oscar:

I have the rear prism done using a smaller angle and the front is about 1/4 done. I should be able to test these new ones tomorrow and see if that makes it worse or better. I'll let you know what i find out.

Leo Mandy · April 14th, 2005, 05:36 PM

I myself am waiting on a achromatic dioptre that I ordered off ebay without bidding - I just couldn't wait! When that comes in, I am going to finish up my DOF machien and onto the anamorphic prism, which I think is awesome! Great job both Oscar and Keith.
I am going to have to source out some cheap museum glass though...

Oscar Spierenburg · April 14th, 2005, 06:00 PM

For the glass, try a framer (as in: frames for paintings), they often have left over strips of museum glass.

I also want to let people know that my 16:9 prisms work perfectly, as I have shot some 30 minutes of footage without any trouble. The prisms are not too heavy, are not too vulnerable(I dropped one on the floor by accident and nothing happened) and in my setup they are easily positionable when changing lenses.
I can use 50mm and 135mm lenses with no problems.

On more thing, the museum glass deals with reflections perfectly, I had only one lens flare when I put the camera next to a 500w spot with totally uncovered lenses and no sunshades.

Keith Kline · April 14th, 2005, 06:34 PM

That's great to hear Oscar. I'm amking progress on my new front prism and I think I have enough materials to make a set with 30 degree prisms so that way we can compare the 3 sets to do any calculation we might need to do. Once I get a set looking close to what i want it to I'm going to contact some framing shops to see about getting some scrap pieces.

Also does anti reflective mean the same thing as anti glare?

Leo Mandy · April 14th, 2005, 06:42 PM

Footage Oscar, footage!!! I want to see it!

Oscar Spierenburg · April 14th, 2005, 06:46 PM

Let me edit it a bit and I'll post some....tomorrow, it's too late at night at my half of the globe right now.

Leo Mandy · April 14th, 2005, 07:20 PM

I'm looking forward to it.

Leo Mandy · April 16th, 2005, 04:59 PM

Hey Oscar,

I am having a bit of a time finding 'museum' glass. Two places today never heard of it, but another place - after I explained - showed me non-glare glass, the problem was it was slightly frosted. Is there another name for it?

Oscar Spierenburg · April 16th, 2005, 07:25 PM

It's also called anti-reflective glass and sometimes UV-glass, but than you have to be sure it has an anti-reflective coating too.
The non-glare glass is unusable. Like you said, it's frosted (like a pretty good ground glass actually.)

Take a look at http://www.tru-vue.com/Content.asp?pn=consumer/products
Thats the kind of glass you need.

OK, here's just a portion of the test scene I did last week, to show a small pan with the anamorphic lens (and a 135mm lens on the adapter) click on the top link on my page:
http://doublecam.250free.com/
The dark spots on the top left got nothing to do with the lenses, it's dust on the mirror of my double camera system.

Jonathan Pacheco · May 16th, 2005, 07:19 PM

Any more news? After seeing that footage, I was amped!

April 13th, 2005, 09:27 PM	#62
Keith Kline Regular Crew Join Date: Aug 2004 Location: Akron, Ohio Posts: 153	Oscar Bottom of the page... http://www.twistedinsomniac.com/mini35/

April 13th, 2005, 06:56 PM	#61
Keith Kline Regular Crew Join Date: Aug 2004 Location: Akron, Ohio Posts: 153	I'll post some pics tonight of the way I had it set up. I also have a new rear prism about 1/2 done with a different angle in the prism. With the larger angle prism it would only work with the prism points facing towards the front of the camera. I'll post some pics tonight so you can see what I was saying.

April 14th, 2005, 04:35 AM	#63
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	I checked my prisms, but just by looking through them does not make you think it's stretching that much, so are you sure the first setup is doing nothing? I just don't understand. Try looking at something square. Also (I know it as just a quick test), but notice that there is color aberration in your picture so you have to place the prisms in a smaler angle (to each other and the camera lens) There is just one angle where the aberration is gone.

April 14th, 2005, 04:21 PM	#64
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Keith you are making awesome progress! Good for you, I would love to see more. How did you come up with the Wax technique?

April 14th, 2005, 05:06 PM	#65
Keith Kline Regular Crew Join Date: Aug 2004 Location: Akron, Ohio Posts: 153	<<<-- Originally posted by Mandy Leo : Keith you are making awesome progress! Good for you, I would love to see more. How did you come up with the Wax technique? -->>> Thanks. It's getting there. I based the wax glass on the ideas I got from this thread... http://www.dvinfo.net/conf/showthrea...threadid=33489 It's slowly but surely getting there.

April 14th, 2005, 05:08 PM	#66
Keith Kline Regular Crew Join Date: Aug 2004 Location: Akron, Ohio Posts: 153	Oscar: I have the rear prism done using a smaller angle and the front is about 1/4 done. I should be able to test these new ones tomorrow and see if that makes it worse or better. I'll let you know what i find out.

April 14th, 2005, 05:36 PM	#67
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	I myself am waiting on a achromatic dioptre that I ordered off ebay without bidding - I just couldn't wait! When that comes in, I am going to finish up my DOF machien and onto the anamorphic prism, which I think is awesome! Great job both Oscar and Keith. I am going to have to source out some cheap museum glass though...

April 14th, 2005, 06:00 PM	#68
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	For the glass, try a framer (as in: frames for paintings), they often have left over strips of museum glass. I also want to let people know that my 16:9 prisms work perfectly, as I have shot some 30 minutes of footage without any trouble. The prisms are not too heavy, are not too vulnerable(I dropped one on the floor by accident and nothing happened) and in my setup they are easily positionable when changing lenses. I can use 50mm and 135mm lenses with no problems. On more thing, the museum glass deals with reflections perfectly, I had only one lens flare when I put the camera next to a 500w spot with totally uncovered lenses and no sunshades.

April 14th, 2005, 06:34 PM	#69
Keith Kline Regular Crew Join Date: Aug 2004 Location: Akron, Ohio Posts: 153	That's great to hear Oscar. I'm amking progress on my new front prism and I think I have enough materials to make a set with 30 degree prisms so that way we can compare the 3 sets to do any calculation we might need to do. Once I get a set looking close to what i want it to I'm going to contact some framing shops to see about getting some scrap pieces. Also does anti reflective mean the same thing as anti glare?

April 14th, 2005, 06:42 PM	#70
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Footage Oscar, footage!!! I want to see it!

April 14th, 2005, 06:46 PM	#71
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	Let me edit it a bit and I'll post some....tomorrow, it's too late at night at my half of the globe right now.

April 14th, 2005, 07:20 PM	#72
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	I'm looking forward to it.

April 16th, 2005, 04:59 PM	#73
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Hey Oscar, I am having a bit of a time finding 'museum' glass. Two places today never heard of it, but another place - after I explained - showed me non-glare glass, the problem was it was slightly frosted. Is there another name for it?

April 16th, 2005, 07:25 PM	#74
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	It's also called anti-reflective glass and sometimes UV-glass, but than you have to be sure it has an anti-reflective coating too. The non-glare glass is unusable. Like you said, it's frosted (like a pretty good ground glass actually.) Take a look at http://www.tru-vue.com/Content.asp?pn=consumer/products Thats the kind of glass you need. OK, here's just a portion of the test scene I did last week, to show a small pan with the anamorphic lens (and a 135mm lens on the adapter) click on the top link on my page: http://doublecam.250free.com/ The dark spots on the top left got nothing to do with the lenses, it's dust on the mirror of my double camera system.

May 16th, 2005, 07:19 PM	#75
Jonathan Pacheco New Boot Join Date: Apr 2004 Posts: 9	Any more news? After seeing that footage, I was amped!