Originally Posted by
Steaphany
This engine is located in a field and I don't know the land owner to have gotten permission to photograph it up close. This was shot from the fence line on the shoulder of the road passing the field.
The Orion 1250mm, 90mm Ø, Maksutov Cassegrain is a small astronomical telescope and has a fixed aperture of f/13.9 and there is no way to adjust it.
ISO 400 was chosen to compensate and get the shutter to 1/200th so that most of the engines motion froze while leaving enough to provide a sense that it's running.
Since the angle of view was 0.95°x0.63°, it still turned out to be too tight which is why it took a 9 frame mosaic to capture the whole engine.