3D-Printed Anaperture Single-Shot Anaglyph Aperture

3D Gunner wrote:

ProfHankD wrote:

1. Use a lens that doesn't vignette. FF lenses are a better bet for APS-C than ones designed to just barely cover APS-C, but lenses vary a lot.
2. Make the pair of apertures fit within the smaller non-vignetting aperture size.

Still, your shots don't look bad.

1. The lens used is a very good one, for FF cameras.

2. I will also do some tests with 5mm holes 4mm apart (9mm separation).

I currently use a device with two lenses with an inter-axial distance of 9mm, for 3D macro, half a frame for each eye.

A typical 50mm f/1.4 will vignette badly until somewhere between f/2.0 and f/5.6. If it happens to be one of those f/5.6 ones, 50/5.6 is just 8.9mm, so your 5mm holes 9mm apart would not work. You need 19mm clear, and that would require no significant vignetting by f/2.6. Being a FF lens on APS-C helps your odds, and a medium format lens typically will do even better, but it's entirely dependent on the lens. Vignetting is usually not the quality metric people look for, but it is pretty much THE metric here.

BTW, longer focal length lenses work better because the same f/number gives a larger diameter for your two stops to fit within.

Using this procedure, I expect to be able to obtain a better image quality in terms of resolution, but with severe limitation to the anaglyphic mode and a lack of uniformity in terms of horizontal color distribution.

Lack of color uniformity => vignetting.

Anaglyph capture effectively interleaves the left/right image pixels, so arguably the resolution is the same as side-by-side half-sensor shots. Biggest advantage is you get the native aspect ratio and effective focal length, and you get to use favorite lenses. It also wins in that the rig doesn't add significant size to the lens, unlike the mirror adapters and dual-camera rigs.