Living in Houston, I don’t do much astrophotography. When I do attempt to capture the night sky, it’s usually with a wide angle lens and a long exposure, like this shot from the Lick Observatory in California a few years ago.
However, this month all of the news outlets in Houston were hyping up Jupiter and claiming that you would be able to see not only the planet, but also its four largest moons with only binoculars June 10. I decided to had to check it out.
I pulled out my vintage Leica R 400mm f6.8 Telyt and stacked both a 2x teleconverter and a 1.4x teleconverter before attaching it to a Sony A7II and bolting it all to a good tripod.
I’m not a big fan of teleconverters since you lose stops of light and some detail, but I was going for maximum magnification, and this rig got me the equivalent of a 1120mm lens.
For reference, this is how close 1120mm gets you to the moon on a full-frame, 35mm equivalent camera.
I have the StarTracker app on my phone, so I knew right where to look in the sky. The hardest part of the evening was waiting until Jupiter made its appearance above the neighbor’s trees about 10:30 p.m.
I took a couple dozen shots at varying shutter speeds and ISOs, but it seemed like f8 (plus the lost stops from the teleconverters, so actually f22), 1/500 second at ISO 1600 gave the clearest results. However, I had to develop the RAW files twice — once to properly expose Jupiter and once to expose the moons. Then I combined the two files into one photo.
There is Jupiter with Io, Europa, Ganymede, and Callisto. It’s not going to win any awards, but it’s pretty cool that you can see at least some amount of detail on Jupiter even using old lenses from the 1970s.