precedante suivante
Anaglyph : France - Italie - Suisse.

France - Italie - Suisse.

precedanteprevious suivante
next

We are in Italy. At the top left it's the border between Fance and Switzerland.
Many summits of the Mont Blanc Massif, one of which is Aiguille d'Argentiére 3901m. At the bottom left it's near the border between France and Italy. It's the Gran Paradiso 4061m. The deep Valley that separate the image in two part is the Aosta valley ~600m. Behind is the frontier between Italy and Switzerland. The highest summit is the Grand Combin 4314m. On it left the big pass is the Grand Saint Bernard pass 2469m. In the back it's the Rhône valley from Martigny to Montreux ~400m. At the horizon it's the Jura (Switzerland) ~1600m. (At the right we are going to the most vertical summit of the Alps : Monte Cervino or Matterhorn 4478m, unfortunately out of the image). At the right horizon it's the Bern Oberland ~3200m.

How can I do a stereo like this one ?

If you are a little bit lucky, you take a plane by a clear day and you have your camera. Frame the subject, shoot, don't move, wait 3 seconds and shoot again. It's done, you have take a very large base hyper-stereo.

Why? Because the plane speed is about 900 Km/h or 250 m/s. Waiting 3 seconds between the 2 photos is equivalent to a shift of 750m. Yes, when you watch this image your eyes are not separated by 6 cm but by 750m.
Why such a base? This landscape is vaste, and the midpoint or the point of interest is about 100Km faraway. If you used the 1/100eme rule the stereo base must be 1 Km.

I can't believe that! On this image all is very small.
Yes, it is a well none effect in hyper-stereo, all looks like a model, but the reality is very different. The plane flies from Pisa in Italy to Lyon in France. It is now in the south east of Torrino, over Suza. The foreground is 25 Km faraway (the 1/30 rule for the foreground is respected), The Grand Saint Bernard pass is at 90Km and the Jura at 220 Km. The Bern Oberland at 150 Km.

Conclusion : to take stereophotography from a plane, it is just necessary to shoot 2 times spaced by 2 or 3 or 4 seconds, depending to the subject distance. This is nice rule, it is for small plane good also. Small plane flight slower but lower, and the viewed landscape is smaller.

Technical data here

These images are to be freely viewed, but remain my property. You can use them at your convenience for your private viewing. You are also able to, in the scope of a public or non-commercial presentation, illustrate what seems good to you, and use of these images in any type of media will always be under the condition that credit is given to me with my name either in captions, print or with sound. If your presentation requires paid admission or other financial compensation, you must ask for my authorization.
P. GIDON


Home page.

More pictures here.