If we want to make astrophotographic use of our telescope, we can find some difficulties, one of them is focus. Cryford focusers and focusers help us optimize the photographic performance of our telescope.
When working with Schmidt-Cassegrain model telescopes we run into the difficulty of focusing for astrophotography, this is due to the movement of the main mirror.
To counteract this defect we need a focuser or crayford focuser, with it we can correct this focus error and obtain the ideal image quality.
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