Home › Forums › Spectroscopy › Focal reducers for Alpy! › scary page on focal reducers
1 November 2016 at 10:57 pm #577576
Since we are near Halloween, have a look at these pages concerning focal reducers on Christian Buil’s site.
The first one describes precautions to be taken with focusing using a focal reducer with a LISA but the second one, looking at the effects of the interraction between chromatic aberrations and atmospheric dispersion is particularly frightening !