Is anyone guaranteeing .95 strehl at a specific wavelength? Or are they just finding the one wavelength in the visual range that happens to reach 0.95?
Astronomics guarantees the Strehl value at what wavelength I am not sure. I just checked my interferograms on some other AT OTA's and I am unable to locate the tested wavelength. So its probably red.
It would be nice if it were green, but it might be red. And for those following along, there is no direct correlation between a strehl value in red and one in green, In other words, you cannot simply do math to convert the Strehl in red to one in green. For a mirror, YES. For a lens, NO. This is because of spherochromatism. The longer the focal ratio the closer the numbers will be, but there is no direct conversion.
Edited by peleuba, 02 August 2020 - 07:42 PM.