4 ms·
Is that actually true? I do astrophotography through an f/10 telescope and its focus is very sensitive. I use a focuser that moves the camera 0.04 microns per s
by malfist 10mo ago
Is that actually true? I do astrophotography through an f/10 telescope and its focus is very sensitive. I use a focuser that moves the camera 0.04 microns per step.
Not doubting you, just asking to understand. Astrophotography doesn't always behave the same as terrestrial photography
- ruined 10mo agoin addition to aperture, percieved depth of field greatly depends on: - focal length (wider is deeper) - crop factor (higher is deeper) - subject distance (farther is deeper) compared to your telescope, any terrestrial photography is likely at the opposite extremes, and at a disadvantage everywhere but subject distance. but, focus is most mechanically sensitive near infinity. adjustment creates an asymptotically larger change in the focal plane as infinity is approached. in a point-and-shoot camera with a wide lens at f16, "infinity" basically means across the street.