3,200 mm f/22. 7D Mark II + EF 400 2.8 L IS + EF 2x TC II + EF 2x TC III + Sigma 2x TC, supported by Manfrotto 516 fluid head and 475B tripod.

Shooting info - Bued River, Rosario, La Union, northern Philippines, April 20, 2017, Canon 5D MIII + EF 16-35 f/4 L IS, 35 mm, f/5.6, ISO 320, 1/20 sec,
manual exposure in available light, AWB, handheld, AI servo, near full frame resized to 1500 x 1000.