Noticed that my 4" f/10 TAL refractor was giving slightly skewed images at high power. Took the cell off and examined closely - there were only 2 seperation pads between the elements, the third obviously missing. I took the thing apart and made three others from very thin shim stock and reassembled. Proof of the pudding will be stars images, Anyboby out there got stars?!!!
Is the seperation on these acromats critical or just supposed to be equal amd minimal? How about rotation between the elements, is there a "sweet" spot that is discernable at the eyepiece (star image)?
Like I said, I'm outta my league when it comes to refractors.
Walt
Is the seperation on these acromats critical or just supposed to be equal amd minimal? How about rotation between the elements, is there a "sweet" spot that is discernable at the eyepiece (star image)?
Like I said, I'm outta my league when it comes to refractors.
Walt
