Stenopiac image just means pinhole image.
While pinhole images can look fairly sharp, they can't match the
sharpness of a lens. The optimal pinhole for an 8x10 inch camera can
resolve about 5 lines per millimeter, which will look sharp as a contact
print. A good lens can resolve 100 lines per mi
Dan-George, thank you for the link! That is a beautiful ancient scaphe dial.
The article says: "The sundial features ... Greek names of seasons". I can
read a number of characters, which at all three date lines (equinox and
solstices) seem to include MEPINH. What season names are these?
Keep healt
Dan--
.
If the hole is very small compared to the projection-distance, then the
image of the Sun projected on the wall would be sharp and clear-edged,
nearly free of fuzziness. Its size will be about 1/100 of the
projection-distance.
.
The un-fuzziness of a small-aperture projection is the reason
Hello,
I'm a big fan of meridian lines inside churches and I know these are sort
of camera obscura sundials.
While I understand the geometry behind pinhole camera projections I can't
seem to find any help on how the solar image forms after the rays pass a
sizeable aperture nodus (for example a ve
