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geoflewis last won the day on April 14

geoflewis had the most liked content!

About geoflewis


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  1. Came back in after an unsuccessful planetary imaging session. Seeing was at best 2/5, giving brief periods of relative sharpnes, but not consistent enough for a good result, so I gave up. However, the sky was crystal clear, so I spent half an hour or so with my Vixen 2.1x42 and Bresser 8x42 binos sweeping the MW from Perseus, through Casseopia and Cygnus to Aquila, also taking in M31, M33 and M45. The Double Cluster looked great and the nebulosity in Cygnus around Deneb and Sadr was glorious, with the NAN and Pelican both well defined in both pairs of binos - actually even fairly well see with the naked eye. It was great to get out under the stars again.
  2. I've just rolled back the RoR hoping to have another run at Saturn and Jupiter this evening. It will be my first outing for the best part of 2 weeks, as I've had a stinking head cold for most of that and daren't risk it. Feeling much better now, but even so I'll probably only go for a relatively brief session.
  3. Peter, as I've already commented elsewhere, this a unique (to me anyway) and truly wonderful image. This would make a great wall poster - just love it 👍.
  4. I've just tried this in Affinity Photo. Seems to work very well. The below are fully processed image of M90 from earlier this year, a starless version using StarX and a stars only version by duplicating the original image as a layer, then using subtract blend mode on the StarX layer. Using StarX on the fully processed image isn't what one would normally do, but I wanted to just see if it works. I'm sure that this new tool will be a great addition to my DSO processing workflow. It would probably have made processing that horrible saturated star at the top left much easier to handle.
  5. Thanks Terry, the rotation is so fast that you can easily observe it over the space of just a few minutes. Hence, I keep my capture runs to 1 minute per filter to mitigate/avoid smearing, then use WinJupos for de-rotation stacking to increase SNR for improved resolution.
  6. I decided to create an animation of the images that I collected during the mostly good seeing of 15 Sept 2021. The animation lasts about 5 secs, but covers an elapsed time of approx 1 hour of Jupiter's rotation, with the GRS in transit. Some variation in the seeing is apparant. To create the animation I produced 36 separate RGB images from the separate R-G-B videos captured with my mono ASI290MM camera through the C14. Thanks for looking.
  7. That's an excellent item Neil. I often use an ADC, even when imaging with a mono camara at low elevations, e.g. for Jupiter and Saturn currently, as there is still some dispersion in the fairly broadband Red, Green and Blue filters. However, I did find that they had a net detrimental impact on Mars last year when that was up at ~40 deg elevation, so it's definitely worth trying with and without at higher elevations.
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