Below, the small sunspots designated AR2797, AR2798 and AR2799. The latter has the particularity of being the first in the Northern hemisphere of the Sun for the last 2 months. This is a one-shot exposure of 1/3200s at ISO 100 on an APS-C CMOS sensor through a 85mm f/5.3 refractor (Takahashi FSQ85) with a visible light sun filter (transmission 0.01%).
The sun filter is a Mylar sheet (a form of dimensionally stable thin plastic) powdered (probably) with aluminium to block 99.99% of the light of the Sun and allow observation of sunspots.
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