Welcome to our community

Be a part of something great, join today!

Log in
  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Single RED Epic stereoscopic adapter - RED 3D shooting made easy...

M

Maciej Orman

Well-known member
Joined
Aug 9, 2012
Messages
69
Reaction score
0
Points
0
Here is the adapter in my hand:

classic1.jpg




classic2.jpg


classic3.jpg


classic4.jpg


classic5.jpg



It accepts 28, 35 and 50mm Cannon lens with 58 or 52mm filter thread.
Has adjustable convergence down to 1m.

Sample images and movie clips will follow...
 
Last edited:
Nice
 
I estimate from the pictures that it in theory it works for shots where you have nothing closer in shot than 3 meters or so, is that correct? since I estimate your "eyes" can not get closer together than 5 centimeters or such. We been fiddling with simular setups and then found out that you need to be able to get the lenses from zero distance forrealy close shots up to more than normal eye distance for really big wide shots. Thats where I gave up and realize that there is a reason why Triality and all of them use half transparant mirrors... :(
 
No, there is no such limits. The adapter can be built for realistic 3D geometry or for the screen parallax optimized 3D production contents.
In realistic mode the adapter has 62.5mm stereo base and convergence is set to match the target screen size.
In screen parallax optimized mode the convergence can be set arbitrary from 0.3 m to infinity as required by the target screen optimization limits.
I can also build one for the 24mm lens which would yield over 35 deg horizontal view angle per eye.

Shortly next week I will also finish building a tridelta type adapter for the 4k RED Epic, the World most advanced and nicest camera.
 
Maciej,
Just pointing out.. the epic is 5k.

Other things worht thinking of.
Since you split a lens in half you would get quite different lens distortions from the left and right eye, or? Like the right side of the left eye is shot in lens center and the right side of the right eye is shot on the edge of the lens... So when panning etc your image would distort different in left and right eye... or?

And it's not only the screen paralax that needs to be adjusted (that you can actually very much do in post with just missing some pixels on the side, by projecting the images onto planes and shoot them with paning VR cameras. but the important thing to be able to adjust is "eye distance" and that can only be truly adjusted "in camera".
In other words you need to be able to shoot with down to zero (close to zero, read a cm or 2) and at least up to 15cm (even more if you want to shoot grand lanscapes and such and get any 3D out of it.)

So basically my question was where and how big is the range for the actuall eye distance of this rig?
 
I am compiling a small 3D Blue-ray ISO and will post download link...
 
I'd love to see some sample footage. ( as separate eyes, not horrid anaglyth please )
What is each eyes aspect ratio ? Portrait, I assume.
What is minimal lens focal length before the edge of the mirror is seen?
Thanks.
 
Maciej Orman said:
@paulherrin
500-600 EURO regular or scratch resist mirrors...
Click to expand...

cool, thanks man. look forward to seeing it. the only real concern i have is being able to set up your shot artistically... i'm not a real big measuring guy, i don't use focus tape or a light meter - i just like to look at the thing and say when.

les, i agree anaglyph is pretty poor (although there are some pretty cool color optimizations for it that have improved the viewing experience) - but it would be nice to have additionally 1. as a quick check while you burn a disc or prep it for viewing properly and 2. so almost everybody can view it.
 
paulherrin said:
cool, thanks man. look forward to seeing it. the only real concern i have is being able to set up your shot artistically... i'm not a real big measuring guy, i don't use focus tape or a light meter - i just like to look at the thing and say when.

les, i agree anaglyph is pretty poor (although there are some pretty cool color optimizations for it that have improved the viewing experience) - but it would be nice to have additionally 1. as a quick check while you burn a disc or prep it for viewing properly and 2. so almost everybody can view it.
Click to expand...

There is a convergence control with scale showing stereo window distance and size and as an option stereoscopic laser marker can be projected into the scene to show where the stereoscopic window is intersecting with a scene objects.
 
Maciej Orman said:
This type can be manufacture with stereoscopic base from 50mm up. But I have another design which covers bases from 60mm down to 10mm.
Here is the page which explains the geometry of such beam splitter:
Click to expand...

technically this design is not a "beamsplitter" as you are not splitting light like on a mirror/beamsplitter rig........on the design you posted a photo off you are only reflecting light. I would call it more of a Image splitter or something like that.....definately not a beamsplitter.....

Just wanted to clear this up......
 
In general beam splitter divides the original input beam into two new ones and the new ones either retain original geometry or are halves of the original.
In short, mirror splits geometry and half mirror splits intensity of the light-field while retaining geometry.
 
Maciej Orman said:
There is a convergence control with scale showing stereo window distance and size and as an option stereoscopic laser marker can be projected into the scene to show where the stereoscopic window is intersecting with a scene objects.
Click to expand...

aha, sweet
 
You must log in or register to reply here.
Back
Top