The Swamp at 01Z (1900L) tonight:
Temperature 45°F (7°C)
Wind Speed Calm (surface level "push" from the west)
Dewpoint 32°F (0°C)
Seeing 7 -< 5 (river fog)
The SCT rotary eyepiece holder came Thursday. It's a NOS 4-slot .965" unit that Brian has on sale here. Fit my 1976 C5 perfectly, except... it needs maybe 2mm to clear the focus knob -- nudges it out of focus as you spin it around. I loaded it with spectros 25/20/15/10mm eyepieces, and tested it against another 5" scope -- my triplet F5 refractor.
The rotary holder is very nice - positive "click" when the eyepiece is set. I started with Mars in the C5. I made out a marking at 125x with the PL10, and the phase. Vibrant colors in the old SCT. Collimation held from the previous sessions. These turrets make zooming up/down easy -- and since we'd been back from The Gulf only a couple of hours, I was in a mood for easy.
On to clusters & such, and the refractor dazzled as usual. Had both scopes at 50x, and the triplet resolved more of M37's faint stars than the C5. But zooming up to 80x, it completely filled the field -- beautiful! Took less time to star-hop to M37, M38, & M36 with the frac. But I think a newbie wouldn't have too much trouble. A good thing, as the C5's tiny straight-through finder gets into unusable positions!
If I had just the C5 and the Questar, the C5 would be my DSO scope. The extra aperture makes a difference, and it's no more trouble to tote out, set up, and move around the yard than the Q on its D&S tripod.
Gonna check the skies in a while, but I bet my night is done. In any event, the Moon rises around 2330 local, and its glow will start wrecking the skies about 2200...
Edited by Bomber Bob, 26 January 2019 - 08:51 PM.