geoflewis

Very nice, nothing but cloud here again last night.

Excellent images for just 35 degree elevation Avani.

On 18/11/2022 at 23:00, Kon said:

I received a methane filter from Astromania yesterday and I managed a quick imaging session tonight. Nothing spectacular in terms of seeing but it was nice to capture some images using the new filter. Jupiter in methane, IR and rgb. With incoming clouds I only managed a quick capture for each filter. From the colour image and  IR, it is apparent that seeing was  quite off. 8" Dob, manual, asi462mc, 2.5x TV powermate. For the methane, my capture was 60ms exposure, gain 430 and 15fps. Thanks to Geof and Lee ( @geoflewisand @Magnum) for the discussions we have been having in the background regarding CH4 imaging. I hope to try with good conditions and see if I can pull more details out.

 

A lovely set of images Kostas.

Simply superb

Wow, that it is superb. I have never seen a Moonbow....👏

Nice capture Peter

I love it Kostas, the Eagle has landed on Mars, 53+ years after the Moon.....🤣. Nice capture BTW

Very nice

Nice Mars, with excellent polar hood showing.

Three lovely images Simon, the 1st Jupiter is the best, but also a very nice Mars, with good detail showing.

Wonderful images Avani

Excellent Mars capture and a nice looking scope

Very good Mars

Well done. I recall capturing my first images of Jupiter with a DSLR and it's not an easy gig.....

22 minutes ago, Kon said:

There were a lot of good images; I am speechless and very honoured to be inbetween Geof an Neil. I really want to thank Neil for the tremendous support and advice on my processing since I started this year.

Ditto to that about @neil phillips, I had a huge amount of help from Neil, both in which colour camera to chose this summer, and then how to optimise using it with my rig. He's still one of my primary gotos for continued advice, so I feel a little bit that I cheated him out of winning.

54 minutes ago, kirkster501 said:

Well done Geof, I really like it.

Thanks Steve

OMG, it’s the first time I’ve won anything, so how happy am I. The standard set by everyone was excellent, so to get my animation voted best in the >50N deg category in such illustrious company is very pleasing indeed, thank you.

Congratulations also to Avani, Kostas and Neil.

Thanks. For this image I was using a permanently mounted C14, with an ASI462MC camera with and an ADC. If conditions are excellent I sometimes include a barlow or Powermate to increase operating focal length for additional amplification.

3 hours ago, astroavani said:

I didn't think my simple comment would yield such an interesting discussion.
First of all I want to thank Vlaiv, Geof and others who participated in this post as this is of great interest to me.
I always try to juggle physics with practice and try to understand what can go wrong when it doesn't.
As some have said, I just think that processing oversampled images and getting a good result is easier than correctly sampled images. I can't explain why, it could be a deficiency of mine that I don't know how to process at f/11 or f/14 correctly.
The impression I've always had is that images at f/22 are smoother, so they're much easier to work with.
I'm a bit of a purist astrophotographer, I don't make defeats, I don't cut moons to process the piece and I never go over 90 seconds of image to avoid drag, so I actually use a very simple but effective processing line that gives me good results and despite All theory says that if I take pictures at f/14 with the C14 I should get good results, practice has not yet been able to show me that.

Hi Avani, thanks for you observations and contibution to this topic, which seem to align with what most of the top planetary imagers do. I also don't know why the field experience of so many experts doesn't support the mathematical theory. There must be something about imaging through Earth's atmosphere (or something else) that changes the maths in a way that I do not understand and certainly can't explain.

55 minutes ago, Space Cowboy said:

Certainly better than what I got the other night 🙂

Thanks Stuart

I thought I'd consigned all my videos from 8 Nov 2022 to the trash, but when checking items to back up I found them still lurking on the hard drive, so I hada look at them. The conditions were very poor, with a lot of low cloud, so I was primarily experimenting with where in the optical train to locate the lens from my new Baader barlow ready for better conditions. I started out trying with a barlow screwed into the end of the nosepiece, giving F21 so no better than with my x2 TV PM, then screwed inside the nosepiece close to the sensor for F18, which was more what I was after. Neither of those amplifications were usable for the conditions, but I did capture a single run without the barlow, which is just about usable, so here is the result from that. It's best 6000 frames (~22%) from a 6 min SER, captured at 13ms (76 fps).

Having captured the data through a fair amount of haze, getting any detail to show whilst controlling noise proved challenging, but some details are coming through and oval BA is well seen just past the meridian.

13 minutes ago, knobby said:

Not 100% sure but I think he means one of these ...

https://www.firstlightoptics.com/visual-oberving-rgb-filter-sets/astro-essentials-125-wratten-47-violet-filter.html

Looks like its a visual fiter, so maybe why I've not seen any images from using it.

2 hours ago, Space Cowboy said:

Scientists certainly wouldn't be interested in what I produced over the weekend as conditions have been dire here. You're producing some great detail under the circumstances Geof. Ideally we'd all want to produce sharp smooth shots but UK seeing doesn't always allow it so we have to compromise one for the other at times. 

Thanks Stuart, unfortunately the seeing has been very poor recently. I've been rating it 3/5 based on recent experience, but in reality it's probably been more like 2/5 - just pleased to be able to see anything. The more frames I can stack the smoother the result, but when I went above 10% the resolution fell away pretty quickly, which I think tells it's own story. The recent fog indicates more stable air I think, but it's been getting so thick here that I was having to push the gain up until eventually I couldn't see anything.

Excellent images. As @Kon says, to get rid of the ring artefact, just select the planet in PS, Affinity, or what ever image processing tool you prefer, then invert to select the background and fill with the same colour.

Lovely images. I don’t think I’ve seen many, if any, NUV images of Jupiter, so what bandwidth is that please?