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Trying to organize all the images in the last post is impossible in blogger. So I have started a new post with the prom images.
A nice prom at about 2 o'clock on the NW limb. Low brightness unless I boost the gain.Then it burns out the brightest areas.
I tried four different GPCs and Barlows to try and tease out some scale and sharpness. Far too much thermal shaking!
A small scale image has to be enlarged. A large scale image is more prone to bad seeing. It also demands more gain or longer exposures. Longer exposures are far more prone to thermal image movement, poor tracking or wind. Added gain produces noise.
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