As seen in this video, a shaped hole cut out of a black material will yield bokeh that takes the hole's shape when placed in front of the lens. But when I tried that on my compact camera the paper blocks the lens's field of view. Why does this happen?
Going to let someone who is sure answer but I would guess that it has to do with proportion, you would have to make the cut-out much smaller and place it much closer to the sensor for a typical compact but it would probably work on something like a Nikon A.– ItaiFeb 11, 2017 at 2:40
@Itai Why do you mean by "closer to the sensor"? And if I make the cut-out smaller, won't the paper block the FoV more?– user152435Feb 12, 2017 at 5:41
Closer to the sensor is closer to the sensor, more specifically proportionally closer so that the cut-out imitates the lens aperture, otherwise it just gets in the way.– ItaiFeb 12, 2017 at 16:26
So you mean I should place the cutting inside the lens, behind the aperture?– user152435Feb 12, 2017 at 18:00
I made myself some pictures like on the video you had shown. And exactly with similar setup DSLR + Lens with very low aperture. On the video you may see around time 1:50 that F=1.4 or so.
What I can say based on my experience with compact camera I have as well there are the following differences:
- As in comments - the distance between aperture and the paper shape, in compact cameras especially with zoom it is quite far, but anyhow there is another matter very important (IMHO more important),
- The value of the aperture. Such photos are done with low aperture like from 1 to 2.8. Myself I had made with 1.8 and shots were very good. But compact cameras have usually minimum aperture like 5.6 (or comparable with DLSR F=5.6). It is much too high especially combined with larger distance between aperture and your paper form.