Hello,
Just for clarification, I have done a quick achromat design using crown and flint combination which lie along the Abbe Normal line for an optimized F6 achromat at best focus. You can compare the spot diagram to the Semi-apo posted on the Burgess site.
Rolando
Just for clarification, I have done a quick achromat design using crown and flint combination which lie along the Abbe Normal line for an optimized F6 achromat at best focus. You can compare the spot diagram to the Semi-apo posted on the Burgess site.
Rolando
Attached Image: