Hello dear friends!Many thanks for all your comments...:-) Dariush asked me, what is the rig?I used 2 Canon 350D with 22 cm base and 168 mm lenses.The concept is the PePax principle.168 mm is 3,36 times longer than 50 mm. So my base is 3,36x65 mm = 22 cm.With this rig, in a zoo, you can shot animals with good results, from 2-6 meters.ONLY do attention to the FAREST point, what must be close!In the (monkey) attachment, you can see that the animal is good, but the farest point is too far...The elephants are in cardboarding, because they were too far from me, about 10 meters.Imre