Quote:
Originally Posted by doppler
If the infocus needed is not too excessive maybe the collimation screws on the primary are wound in tight and you can move the mirror forward a bit that way. The tube etc would be made all the same so maybe the mirror is not f4 but slightly longer? Best to ask Andrews for advice, you shouldn't have to do anything other than collimation to a new scope.
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We tried this at the star party, we moved up the mirror as far up as we could usign the collimation screws but the focus was still so far off that you could see the secondary mirror