raadoo Posted Sunday at 10:46 Share Posted Sunday at 10:46 (edited) I believe I've landed in stump-land with a new imaging setup I'm putting together. In a nutshell: dialling in proper backfocus for my reducer causes the focuser to lose inward travel. In depth: I used the classic "look at the stars in the corners and add shims until they no longer radiate" and I'm very close to getting it perfect (<1mm). Trouble is, as I've increased the distance between sensor and reducer, the focuser (situated between scope and reducer) has had to move ever more inward to achieve focus. This to the point that I now have no more inward travel available and cannot achieve proper focus. I'd massively appreciate any ideas, thoughts, opinions or guidance. _ Image train is: FS-60CB ⇢ CAA (TKA21200) ⇢ Reducer (TKA20580B) ⇢ Adapter to M48 ⇢ OAG ⇢ Filter Slider ⇢ Shims ⇢ Camera Edited Sunday at 12:09 by raadoo Misspelling. Link to comment Share on other sites More sharing options...
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