nice optical effect

nice steady seeing, the southern hemisphere displays four big cores plus one unnamed spot rotationg the limb at 8 o'clock; this last spot shows a distinctive Wilson effect, that is, an apparent inward (towards center) shift of the umbra which is an optical deception derived from the greater transparency of the cooler umbra

Newt 4.5" +solar film, 1/640s ISO100

crop, B/C