Improving refractor contrast ideas needed.

Improving refractor contrast ideas needed.

What are the factors that lead to limiting contrast of a refractor?

Are the lenses and the EP the major factors?

Are the tube, baffling, and internal reflections the problem?

>>>>Improving refractor contrast ideas needed.
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It is probably best to begin by asking these questions:

What are you seeing that indicates that there is a loss of contrast? What is the scope and what targets are of interest?

Jon