Lenticular cloud Over Mount Etna

From the photographer: “Altocumulus Standing Lenticular (ACSL) cloud ‘SANDWICH’ over Mount Etna, Sicily, Italy.”

Technical details:
Canon EOS R Mirrorless Camera, Sigma DG 50mm. lens f/1,4 @  f/2,8
3-sec. exposure @ ISO 6400, edited in Photoshop