Figure 3.14. Insert the eyepiece body into the clamp till the top ledge of the clamp rests on the top of the
eyepiece. This is the default position before starting to make adjustments for best image quality. Once in
place tighten the clamp screws to hold the eyepiece steady but take care not to over-tighten the screws to
minimise risk of damage to the body of the eyepiece. For some eyepieces with very long eye relief you will
need to let the clamp ‘ride high’ on the body of the eyepiece so that the top ledge of the clamp no longer
rests on the eyepiece. See text for details.
While the thumbscrews remain loose you should have some angular adjustment of the
camera on the eyepiece as well as the ability to slip the clamp up or down on the eyepiece
(see figure 3.15). All these adjustments together with the simple XY adjustment shown in
figure 3.9 allow you to get the image of the eyepiece field of view centred in the camera
field as well as achieve the correct eye point distance for for your eyepiece for optimally
even illumination (see chapter 5 for more detail on how to do that).
OptArc AF51 Camera Page 41 of 99 User Guide v1.02
