Friday, February 23, 2024

A large and active sunspot

 There is currently a large and very active sunpot (AR3590) traversing the face of the sun.  It is large enough to be seen with the unaided eye when viewed through safe solar filters.

E-M5iii + Orion 80mmED f/7.5 + Lunt Solar Wedge + ND-0.6 filter.  ISO 250, 1/1600 s.

This photo is a good representation of the unaided view through a black-polymer solar filter:

E-M5 + SIgma 30mmf1.4 @ f/4 + black-polymer filter.  ISO  400, 1/1600 s.

 

That "tiny" speck is visible even with my old eyes.  The sunspot is actually many times larger than the earth.  The black circle in the photo below shows the relative sizes:



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