These are some personal experiments:




My experiments of base calculation, and of check stereoscopic effect were always done on only one pair of stereoscopic views. I compared the results got on each stereoscopic pair with the figures calculated with the formulas. The inconvenience was to have not several bases to compare on the same subject. Sometimes, I would have liked to compare one pair with another one which would have had a different base but shot at the same time.

Thus I had the idea to shot 3 stereoscopic pairs simultaneously with 3 cameras. I started to look for another second-hand Olympus µ1.


Thanks to the Kapica 2002 auction, I was able to purchase this third camera. When I said that it was to do stereoscopic pictures with 3 cameras, everybody guessed this was a joke. But it was not!

 The bar is a corner-plate in aluminum, 40x20x2mm length 420mm, and the three cameras are spaced of 120mm between the first and the second one, and 180mm between the second and the third one. The cameras are electrically connected for shutter release. So, with one release, and three slides, I get 3 bases, of 120mm, 180mm, and 300mm.

I have already shot 24 triplets, which allow me to improve and to complete my experience.



or stereoscopic photography without moving the camera!

Of course, we all know that the stereoscopic effect comes from the fact that the outline of the subject is shifted for each eye with reference to the back-ground. I told myself that if the background was shifted instead of the camera, the same result would be obtained.

It is at the Mont-Saint-Michel that I was able to apply this idea. Indeed, the Mont-Saint-Michel was detaching from a background of clouds that the wind was wiping fast.




I set the camera on a tripod; I released the shutter a first time, counted 5 to 6 seconds, as per my estimate of the move of the clouds, and I released the shutter once more.

The result fulfilled my expectations. The outline of the Mont appears perfectly with stereo effect against the clouds. On the other hand, the cars in front of the ramparts, and the successive plans of the Mont itself have, of course no stereoscopic effect at all.

parallel viewing





What happens when the two pictures are fuzzy or when one picture is sharp and the other is blurred?
In both the stereoscopic feeling is effective. Moreover, even with a blurred picture, the stereoscopic view is sharp!
See this crossed-eyes pair. It is more demonstrated on the1600x600 pixels picture, also crossed eyes.


Clearly, everything out of focus can be seen in 3D. It is because there is a shift of the pictures and the lack of sharpness don't impede the stereoscopic sensation.

It seems that this wipes away some part of the theories calculating the base on the sharpness of the photographs and the depth of field.

crossed eyes viewing