Visibility III / V
A month from my previous Mars image and very much this has grown in size. So I took a picture of Mars with a TMB 152/1200 lens tube and a 2.5x PowerMate extension + my ASI 183MM Pro camera on the morning of September 1, 2020. That introduced a 3000mm focal length, but paid no special attention to Mars imaging technology. I told this to the forum in more detail and from there I also copied the second observation visual observation report here:
“I also looked at Mars visually with the TS 102 / F11 ED tube and it’s just a good game to withstand magnifications! I used the same 2.5x PowerMate extension with the Pentax SW 7.5mm eyepiece, which comes with a 374x magnification and a 0.27mm output pupil in the 102 / 1122mm tube. One cannot really demand more of a 4 "ED lens tube when even at that magnification the image had only a slight onset of chromatic aberration at the top of the planet. From time to time I saw about the same amount of detail as in the attached image, but with a much lower contrast (i.e., that dark area flashed randomly and the pole cap could be fetched by searching). "