Remarks on the photospheric images

• The image diameter is about 64 mm
• Time is CET until March 1981, then UT
• The image are taken with a 80 mm objective and an orange broad band filter on planfilm (9x12 cm) Typolith by Typon until 1974, and then on Ilford Line 4E50
• Manual development with Kodalith and Ilfolith detectors

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