Anyone who wants to take closeup stereo photos has to deal with the following dilemma. Using a twin camera setup sets a minimum baseline that is still too large to achieve the right depth. Switching to sequential stereo photos eliminates this problem but excludes photos of moving objects.
But several apps like i3DMovieCam by the Japanese developer Masuji Suto make use of the possibility to control two of the back cameras of an iPhone simultaneously. This also results in a fixed baseline, which is too small for standard stereo photos — but it’s exactly what we need for closeups. Of course, you have to pay attention to several technical and artistic factors (partially described in Stereo photography to go) but it opens up the world of small animals, insects and moving objects to everyday stereo photography.
© 2021 Pascal Martiné