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originally posted by: gariac
a reply to: FosterVS
You may not want to hear this, but I have found a refractor telescope is what you want for panoramas. The bottom of the line would be something like an ED80.
I've used a Mak, and here are the problems. The mirror focus just doesn't hold in the desert heat, and especially if you are shooting when the temperature is changing, as in the early morning. The Mak doesn't have uniform brightness across the field. You can see panoramas with bright spots in every frame that is used to make the full image. Now you can field flatten to some degree with a photo editor. I use rawtherapee. Even a refractor telescope needs some field flattening. Lastly the edges tend to lose focus on a Mak.
Depending on your hardware, you can put the filter at the back of the telescope. Mine doesn't even have threads on the front for a filter.