  As my own work on the Sun's magnetic field started exactly 50 years ago at
Crimea in the USSR, I have been a participant in the field during nearly half
the time span since Hale's discovery in 1908 of magnetic fields in sunspots.
The present historical account is accompanied by photos from my personal slide
collection, which show a number of the leading personalities who advanced the
field in different areas: measurement techniques, from photographic to
photoelectric and imaging methods in spectro-polarimetry; theoretical
foundations of MHD and the origin of cosmic magnetic fields (birth of dynamo
theory); the quest for increased angular resolution from national projects to
international consortia (for instruments both on ground and in space);
introduction of the Hanle effect in astrophysics and the Second Solar Spectrum
as its playground; small-scale nature of the field, the fundamental resolution
limit, and transcending it by resolution-independent diagnostics.
