3d starfish

Wim van Egmond · Post by **Wim van Egmond** » Mon Apr 24, 2006 3:35 am

This is a 3D image of a living starfish larva. From the archive, I made it years ago. Instead of the polar filter trick I shifted the diaphragm of the condensor which was a phase condensor. It worked best with the diaphragm closed quite narrow. The first one is for parallel viewing, the second for cross eyed. I hope you can see the effect. The depth is a bit exaggerated.

Wim

rjlittlefield · Post by **rjlittlefield** » Mon Apr 24, 2006 8:49 am

Wim, this works great! On my monitor, the parallel pair is almost too big to fuse without a viewer. (My interocular distance is about 60mm, the image separation is 80mm, so I have to go pretty wall-eyed to fuse it.) But cross-eyed is no problem, and the little Wheatstone viewer works well on the parallel.

I'm impressed that you could get this animal to hold still long enough to shoot a stereo pair. Are they just quiet, or did you catch it in a good moment, or did you do something to it?

--Rik

rene · Post by **rene** » Mon Apr 24, 2006 9:09 am

Nice clean shot Wim! Great subject for this. Large detail, even with one unsharp eye I can see it nicely cross-eyed, both combinations end up the same btw. Am seriously considering contact lens by now.

Rene.

Charles Krebs · Post by **Charles Krebs** » Mon Apr 24, 2006 11:26 am

Wim... this works impressively well! Do I understand correctly... you rotated the condenser aperture slightly to either side of "center", so that in effect you had oblique from "left" and then from "right"?

Wim van Egmond · Post by **Wim van Egmond** » Tue Apr 25, 2006 1:54 am

Nice to hear you can all see the effect. Yes, just a slight shift is enough but I had to close the condensor doiaphragm a lot so it does not create oblique. It is against the rules but for 3D you need a lot of depth of field.

Since I only recently accuired a flash in the past year I became a bit of an expert in waiting until the organism was motionless:) Starfish larvae swim very slowly. It is a matter of trapping it against the coverslip just without distorting the organism.

I'll see if I can make some new images like this. It is fun to do.

Wim

Frez · Post by **Frez** » Fri Apr 28, 2006 8:30 am

The crossed eyed works extremely well for me. How do I see the parallel?

Frez

piotr · Post by **piotr** » Fri Apr 28, 2006 4:35 pm

Frez, I think it depends how your eyes are "trained". I'm a "parallel-eyed person", too!

Great images! Impressive 3D effect.