Another chance to play with real people – the nyckelharpa sounded great with two autoharps, and we had the fiddle and a melodeon as well. So lovely to be able to do this again.
At last! Some music played with real people, rather than the unreal Zoom sort! Both the fiddle and the nyckelharpa got some needed exercise.
Image above from the SpaceX video of the flight
This amazing vehicle has taken another step forward; it now flies and has landed safely, still using the same manoeuvre to get from horizontal to vertical just before landing.
Here’s the video:
It will be interesting to see what they manage next. It’s going to be a while before they get this into orbit.
Flying the Ingenuity helicopter carried on the NASA Perseverence rover is quite a feat. It has to be done completely autonomously; Mars is currently over half an hour away for round trip radio signals, so remote control is not an option. There’s no GPS to help navigation either!
A pity they couldn’t have tracked it off to the right as well, but at least it came back!
Here’s the mission website: https://mars.nasa.gov/mars2020/
I decided that I wanted to try a Bahtinov mask for focus tests on the 3 inch refractor, after having tried one on a telephoto lens with some success. The Moon was about so I thought it could be a good test. This image is what I managed purely by using live view to focus. The live view was monitored on a tablet, by using the HDMI output from the camera, and a video capture dongle. Continue reading
Yesterday’s image of M44 Praesepe, or the “Beehive” cluster. This was taken using my old 135mm Pentax fitting lens, with a mild Barlow in the Pentax to Nikon adapter. I use it because it’s faster than my other lenses; f/2.8 as opposed to f/5.6 on a telephoto set at 200mm, or f/4.5 on a zoom set at 70mm. The image quality is not as good as that from the Nikon zoom set at 200mm, but exposure times are much shorter. I need to be patient!
The image is from a total exposure of 240s, and (at last!) with a flat field applied. I took a set of twilight sky flats for all my lenses, so that I can do more experiments.
After a reasonably successful test of eyepiece projection using my old 3 inch refractor, I decided to try again with a bigger distance between the eyepiece and the camera focal plane. Continue reading
Yet another clear evening! A new adapter for my old Pentax fitting lens had arrived, so I was keen to try that; however I had also found an ancient eyepiece for a microscope that fits in the camera adapter for my old 3 inch telescope, so this is a photo of the whole Moon taken with that setup. Continue reading
Yet another unexpected clear evening – these weather forecasters need to get their act together. I’m not complaining about the clear sky though as it meant more tests. Here’s the open cluster Messier 35. Continue reading