Hi,
I spent quite a while fiddling with different filters this morning on Mars. I used Wrattens 58 green, 21 orange, 80a blue, 12 yellow and the Mars filter with its overall color mix presenting a magenta tint.
First, I have to say that I have a greater respect for Carlos. I can see that he has mastered the integration of the various views that several filters can provide all in one drawing.
I settled on using a 311x for comparison. IMO, I liked the presentation of details using the Wr. blue, orange and the Mars filters best.
The orange appeared to give the sharpest views probably owing to its decreasing of atmospheric seeing and great separation of the polar cap while bumping up albedo contrast a bit.
I really liked the 80a's ability to show various brightenings in Mars' atmosphere while also bumping up albedo features.
The Mars filter appeared to show the best of both the filters. Polar Cap separation was a bit less than the previous filtered views. Darker albedo features were a bit improved with a better break with features similar to Argyre. Atmosphere features were less than the 80a, but better than the 21. The Mars filter is more sensitive to atmospheric seeing and refraction.
After about 2 hours of comparative viewing I still believe the 4 settings in the Variable Filter beat the other filters except the 80a's ability to show various brightenings; this feature that I'm referring to is depicted very well in the white areas of any of Carlos' sketches.
Hope that helps, Sol Robbins
I spent quite a while fiddling with different filters this morning on Mars. I used Wrattens 58 green, 21 orange, 80a blue, 12 yellow and the Mars filter with its overall color mix presenting a magenta tint.
First, I have to say that I have a greater respect for Carlos. I can see that he has mastered the integration of the various views that several filters can provide all in one drawing.
I settled on using a 311x for comparison. IMO, I liked the presentation of details using the Wr. blue, orange and the Mars filters best.
The orange appeared to give the sharpest views probably owing to its decreasing of atmospheric seeing and great separation of the polar cap while bumping up albedo contrast a bit.
I really liked the 80a's ability to show various brightenings in Mars' atmosphere while also bumping up albedo features.
The Mars filter appeared to show the best of both the filters. Polar Cap separation was a bit less than the previous filtered views. Darker albedo features were a bit improved with a better break with features similar to Argyre. Atmosphere features were less than the 80a, but better than the 21. The Mars filter is more sensitive to atmospheric seeing and refraction.
After about 2 hours of comparative viewing I still believe the 4 settings in the Variable Filter beat the other filters except the 80a's ability to show various brightenings; this feature that I'm referring to is depicted very well in the white areas of any of Carlos' sketches.
Hope that helps, Sol Robbins
