brrttpaul

been so long since i done some imaging spent half the night trying to work out what everything did, Fed up with my computer and SGPRO (cant update sgpro ) i keep getting an error, and everytime it takes an image it freezes, absolutly does my head in. Anyway managed to get an image of UMA26 only 30x30secs subs of RGB but least I got the focussing sussed now i think

Well there was a small chance last night so tried for the first time in ages to set up, I had gain at 200, exp for RGB was 15 secs. I tried to get an hours worth but when I ran it in blink i had to get rid of a load of bad subs. I am still having issues with SGPRO (keeps freezing if I take a single shot for framing) and also in sharpcap (I can do the sensor analysis but when I click on the brain in the histo to calculate correct exposure nothing seems to happen). right so set up didnt use a bat mask as wanted expecting to get anywhere slewed to a target (cant even remember which cluster it was and ran a sequence. stacked in pix and slight adjustment in LR, no darks or flats or bias. im happy with the result TBH so guess next stage now is to do a dark/flat library. reduced the temp also from -25 to -10

thx mark, im hoping to get some clear skies soon and do a few at different gains etc and see how it goes. I went from unity gain down to 50 and think i went the wrong way if im honest, 200 sounds in the ball park but shorter exposures i think

my images are a mixed bag really, you are right though it can drive you round the bend at times

This is my problem where I went wrong coming from a DSLR and knowing lower ISO is less noise I sort of looked at gain like ISO ( so I was thinking gain @50 is going to be less noisy than gain@139) and thats what keeps creeping in. (not only that but if you take a sample shot gain 50 and another in gain 300 say then gain 50 does look a lot smoother less noisy). I get now what the video says about once reaching a point theres no need to push it further I just dont get the bit where he says "so all you have to do is work out the maths this times that divided by that equals this. I am in . I am in an orange zone using an equinox ed 80 and the 1600 mono cooled, so I think the ed 80 is roughly F6 thereabouts, Just roughly very roughly as a starting point I would imagine i should look at gain of 200 and expose for about 10 secs then? ( thats lum) then triple it for RGB)?

thx guys , I did plan to run the smart histogram next clear sky (so that should be june 2022) I havnt watched that video I must admit

still cant get my head around exposure settings/gain with my asi 1600, for some reason it just dont compute in my head whats the best for a deep sky image in bortle 5 skies, I have done youtube, tutorials etc but still end up scratching my head, sometimes my images are ok sometimes they are terrible. I tried the sensor analysis today but reading it means nothing to me, any pointers? heres a snapshot of the analysis

Its been ages since I done some imaging so sort of went back to basics, M39, its surprising what you forget in a month, had to keep going back to the PI book for some things, sort of happy with it

Ahhh right im with you, I do have a field flatener infront that slides into the telescope locked in place with a locking nut other end goes into the filterwheel, just looked at the flatner and the side that slides into my scope is threaded on the inside, so a 2" filter would screw directly into that then before sliding into my scope?

I was told to put the LP filter infront of everything but I just cant see where it would sit, I have the scope the wheel and the camera so it has to sit inbetween the scope and wheel but cant see how

Hi guys, using the zwo along with the zwo filterwheel, just wondering would I be better off swopping my Lum filter for a light pollution filter ? or does a light pollution filter go in front of the LRGB filters? not sure how that would work tbh with a filter wheel. ny advice welcome

Hi guys and girls, As i am waiting for darkness I took a 1 sec sub in red then blue then green. my blue came out at 1376 median, red was 3086 and green was 3744, Have I set up the filter wheel correctly?? been using it over a year now and this has only just accured to me that my filters maybe labelled wrong

it was just throwing me what dark i needed to do the flats

thanks I will have another go of it now

I dont think PI does pick the specific darks, I have taken a load of darks in various exposures and made masters out of them, also a super bias. Now heres where i get stuck , I have taken a load of flats (various filters LRGB) and wanted to make a master flat in each filter. But in PI it says add the super bias and the master dark to calibrate the flat, well which dark??? the 30 sec exp the 60 sec??? I am just doing this as a library and also to try and understand what goes on , ( Im going on the more I know how it works the easier to sort out problems). In DSS all I have to do is load the darks, flats etc and it makes the master, I just want to stick with PI and persevere with it