Magnum

thanks, yes I always have the near edge box unticked. im more and more convinced its a Registax glitch when I press do all. as its not doing it on my smaller scale captures , only the ones that are over 500 pixels. It really shouldn't matter though as if it was a moon image than it would be the full image image size, so im a bit stumped.

It seems to be just inside the processing area square, but do all should apply to the whole image .

Thanks Neil, yeah I was thinking that though im already using large 104 pixel boxes plus multi scale. maybe I need to make sure that no edges are left without a box? Though I just noticed while doing wavelets in Registax, when I press do all, for a split second the square edge disappears then pops back. wonder if its a Registax glitch.

Jupiter and Io from just after 12:07 am on Oct 7th, pretty good seeing. this is only half the data the rest is still stacking but couldn't resist a quick process while im waiting Meade 12" LX200GPS + GSO 2.5x Apo Barlow @ f23 QHY462C, 5ms, Gain 300, 195 fps, histogram at 70% 5 x 60 sec captures derotated, best 40% of 11,000 frames each. Question for NEIL PHILLIPS , do you know why the edges have got slight squared off at 2 & 8 o'clock. not are if its windups or Registax doing it. Lee

Nice job despite using your smaller scope. Can you take a look at the one I just posted ive put a question for you at the bottom, cheers Lee

looking on sky safari, IO is indeed much darker at the poles especially the north so I think your explanation is spot on, we were only capturing the equatorial region of the moon the rest was lost due to being similar contrast as the planet.

Cheers Neil, Yes I normally do 5-7 captures if I can then derogate them, but all the others that session looked so much worse so dont think combining them would have improved it unfortunately.

I thought that too to begin with but If you look at the last few images on here from that night we are all getting the same shape, and Neils explanation that its a contrast effect due to the poles of the moon being darker than the planet behind. looking on sky safari, IO is indeed much darker at the poles especially the north so I think Neil’s explanation is spot on, we were only capturing the equatorial region of the moon the rest was lost due to being similar contrast as the planet.

If you look on Neils image thread there is an explanation, as I thought I had done something wrong but everyones image from that night looks the same. Lee

Thanks Neil, and thats good to know that Io looks normal, I almost re stacked it until I saw yours was similar. Regarding the 12" dob, I actually used to have one but trying to image with it was too much hard work for me without tracking. though one of the GOTO dobs might be a good choice, As I used to have my 12" LX200 in the Alt Az mode and and it tracked fine for the planets, ive only put it on a wedge as a friend gave me his super solid home made one. Though I keep thinking I might go back to Alt Az mode to make using an ADC easier ( ie only have to set it to the horizon once instead of constantly rotating it through the night ). Lee

Jupiter and Io from 11:37pm on Oct 2nd, seeing was fair to begin with then deteriorated, bit disappointed in this one compared to my last session, only he first capture was any good so didnt bother to derogate the rest. Meade 12" LX200GPS + GSO 2.5x Apo Barlow @ f23 QHY462C, 5ms, Gain 300, 195 fps, histogram at 70% Single 90 sec capture, best 35% of 17,000 frames.

great job,

NIce job Neil, I just finished processing mine from the same time, and thought I had something going wrong with Io as it almost looks like a double image while the shadow was nice and round, but now see yours looks the same. I dont image planets as often as you do so not sure if its normal, but looks the same in both of our captures so I guess it must just be the way its being illuminated? Your image looks a bit sharper than mine, so dont think my local seeing was very good that night. come to think of it I often notice that my first capture is much better than the rest of the session, do you ever get that? my scope lives in the dome so should be at equilibrium. Just about to post mine so you can take a look, Lee

Ive done a quick adjustment, just increased the white pontl slider of the blue channel by 5 points, so its only whitening the whites rather than the balance of the whole image. wont go further than this as then I see blue and I dont like that at all.

Thanks Neil. I also had a 300p about 10 years ago but was too heavy for my EQ6 at the time so I turned it into a Dob and tried to do drift captures but got frustrated with that after one night lol. It was very good visual scope. the Meade 12” SCT’s scopes are pretty good but obviously the C14s are better if you see one cheap. There is a guy ive been chatting to that has some amazing Saturn images and he’s got both a C11 and the Meade 12”, he reckons the meade just has the edge but as he has to travel to image he usually takes the C11 Lee

Yes thanks I appreciated any info and take it all on board. I was mainly replying to explain it was out of choice rather than error. All my previous ones have been for the cooler bluer tone as they come out of registax after the auto balance, but I was never quite happy with them, then today I did this one on the warmer redder side and felt I hade made a step forward. I guess that’s because all the ones I really like are also more red less blue but I hadn’t realised before now what the reason was that I like them. I will have another play with it tomorrow and maybe go in between. also I will go back to my previous colour enhance technique where I only increase the reds rather than the image as a whole. That should reduce any prismatic effect. there is a similar discussion on cloudy nights regarding Saturn and Cassini colours and in that case Im on the other side of the opinion and prefer the rings to be white rather than yellow LOL. Lee

Hmm i can see the orange is maybe a bit strong but just looks more saturated to me, my eyes really arent detecting a prismatic effect at all, I may have pushed the saturation above what my data can support when i was trying to perceptually match it to other better images As you say colour noise reduction really robs the saturation and i hate that more than the effect you are sensitive to. thanks for the feedback, i will look again tomorrow but for now i prefer the more saturated version, except when viewed in this highly zoomed in view. lee

I always tend to refer back to Damian Peaches images as I think most of us aspire towards his images, and most of his are slightly warm never any blue in them. Also It depends what we call white, white comes in all different shades, when calibrating TVs D65 is regarded as accurate and is a warm white. Here is one of Damians Jupiters which i think looks perfect. Ive put it side by side with mine and the color balance looks very similar to me, so as Adam says somewhere between the 2 is probably idea. I will take 2 or 3 points out of the red channel and see how that looks. Though i think my version is much closer than the version you edited.

Thanks Neil. im trying to work out what prismatic effects you are seeing, I’m looking at both and can’t really understand what you are looking at? I did have some fringing around the moon and the shadow which I had to clone out. Lee

That was actually similar to how it started LOL, I always do RGB auto balance in Registax, but to my eyes it is always a bit on the blue side, so I increased the reds on purpose to perceptually matched it to an image I really like https://www.facebook.com/photo/?fbid=10226886614425121&set=gm.1212688352632496&idorvanity=882187155682619 Though his data is soooo much better than mine it can probably tolerate the saturation more than my one can. I feel I prefer jupiter if its slightly on the yellow/red side, as when the whites have any blue in them at all it looks hazy to me. Thanks for your input though, your version looks similar to how I normally process it, ive been through about a dozen versions today but settled on this one. Lee

Jupiter from Sep 21st at 1:15am in fair seeing, with Ganymede and its shadow transiting. Some clear surface features showing on Ganymede. Meade 12" LX200GPS + GSO2.5X Apo Barlow @ f23. QHY462C 2 x 90 sec captures @ 197fps best 50% of 17500 frames each & derotated Exp: 5Ms Gain 324

I just noticed the UK dealers have increased all the ZWO prices because of the pound crashing, well accept Rother Valley, not sure if they will honour the old prices though. I bet the dealers dont reduce the prices when the pound recovers though 😛

try adjusting the usb traffic slider, that can make a huge difference. default on my QHY462C is 40 but if I reduce it to 2 then I get full speed as per the specs, if I go to 0 then it goes slower again, so sweet spot is 2 with my cam and computer

Really? At what region of interest, it should get 200fps at 640x480 I would hope?

Chers, Star removal is part of my standard processing workflow now before adding them back at the end, so I just figure I might as well post both versions as I have them. Lee