I had only mediocre sucess with the conjuction, but we did have pretty clear skies for the 20th, 21st, and the 22nd which was unusual in central Indiana in the winter time - I failed to fully grasp that the correct exposure for Jupiter, Saturn, and the Jovian moons were very different by 3-5 stops each, I would guess.
But finally by the 22nd I had grokked the need for the different exposures, Jupiter being much much brighter than stars and its moons and Saturn and got this .... Shot with an R5 and and EOS 200-400 + 1.4 TC at 400mm via a stationary tripod at 1/30th f4.0 at ISO 400 - 6 frame stack of Jupiter with 4 moons, Saturn and what I think is a moon of Saturn at the lower 1/3 point in the image - you may need to see the image large to find it; it is dimmer than the Jovian moons - millions of miles further from the Earth than the Jovian moons too
This 2nd image was shot with the same R5 and 200-400, but with the TC so at 560, still a very short lens to image planets, 1/30th, f5.6 ( since the TC costs a a stop ) at ISO 400. You can't see the moons as well, but the colors of Jupiter and Saturn are much more satisfactory. You can almost begin to appreciate the stripes on Jupiter. The moons may just be under exposed, or briefly dimmed by the atmsopheric movements - not sure which.
@Glenn_Smith Jupiter slid below the horizon about 2 hours after the sun, so it was following the sun toward the horizon at sunset which was at 5:30 and Jupiter wasn't really visible until about 20 minutes after sunset when it was the brightest light in the sky other than the moon which was mid phase and growing larger, here in the central USA. So we had a short time to photograph before the conjunction slid below the horizon and we had fairly turbulent air still persisiting in the lower atmosphere as well.