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basic back focus question
If I know the cameras back focus- i.e 2.3cm, and I am considering using this on a TAK with an additional optec focuser- does this imply that the camera will come into focus at 2.3cm behind the point of most inward focus (on the tube with no focuser) & so if the focuser pushes the camera out more than 2.3cm does it imply it will not gain focus?
Sorry for dumb question but I am trying to get my head around this.
Graham
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