“Twilight Alpenglow over the Big Horn Mountains” was taken well into Nautical Twilight. (Do you know your 3 twilights and when they occur?) Bear in mind I consider anything sky in the morning BEFORE the sun crosses the horizon still to be at Night and in the evening, once the sun slips behind the horizon, it’s night too…. Lenticular Clouds in Silhouette are always fun. I bet they were impressive from the other side of the hill at sunset. They typically form over bumps in the terrain.
This sky started out Bright Orange at sunset with the same clouds but slowly faded to the longer wave length light red…finally to black with no stars because enough overcast to preclude/veil stars in the frame. This 5 second time exposure highlights cloud shadows and the still glowing atmospheric ice over the Mountains. (Alpenglow is caused by the scattering of the color of light that makes it through hundreds of miles of low angle atmosphere. Typically a deep winter thing every night but I see it every month up here). Those 13000 feet high “hills” are 130 miles from my camera which is sitting on a 4000 foot in elevation ridge almost 2 full Wyoming counties east of the Big Horns.
Photographers notes. Unless your really steady (on xanax or something), you need a tripod for any exposure longer than about 1/15th second exposure and that’s if your really good…. No star tracking required here so just a tripod will do.
Gear.. Sony Alpha 7R4, Canon 800mm Telephoto (Vintage plus mixed cam/lens brands which actually works fine with the right Metabones adaptor between thank you). Tripod. Also a Big Tall Hill top in Montana looking across the border into Wyoming.