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Posts posted by Prolifics
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I hope you don't mind i tried to get more information out of your image.
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Hi Mark
Yes that was the next thing I was going to try with Starnet++
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My first ever Narrow band image.
30 Minutes each of 5 minute exposures HA, O3 & S2 using Hubble Palette in Pixinsight. Gain I made a mistake should have been 200 but used 75 as I reloaded Nina and forgot to change it back from defaults
The 03 filter is giving me halo's on big stars. I need to find out how to fix this (Either by hardware or post processing). I have some elongated stars on 2 sides. Caused mainly by the 5 minute exposures. Tilt maybe an issue? Guiding was 0.53 RMS.
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Just now, MarkAR said:
Great first effort. PI is a superb piece of software.
Thanks Mark its my 5th or 6th ever image I was just messing with my back focus and decided to take a short amount of exposures
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On 27/06/2020 at 21:12, rideway said:
Same here! Got it two days ago... weather was splendid until then
Let us know what your tracking RMS is like. Hoping for around 0.8 RMS with good polar alignment.
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21 minutes ago, Davey-T said:
Have a watch of this when its posted on YT good stuff about colour saturation.
Dave
I will take a look right now many thanks.
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Thanks for the info. I will try longer exposure again. Having huge problems with all these Elon Musk satellites wizzing across my frames so thats why I shortened them.
I am wondering how to get more colour in photshop do I increase the saturation?
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Unforunately I don't have the expertise to post process. It a little dull. I think the data is ok though.
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Thanks for the reply. That makes sense. I shortened it by 0.5mm and it made it worse. I need to put that spacer back on and add another
Thanks for the help.
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Yes I am hoping so. As soon as I get a few hours of clear skies I will restest with a short 20 second exposure to eliminate star trailing. Hopefully it will be better.
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Hi I have uploaded my highest scoring Lum file from a couple of nights ago. There is some funny star shaped in it especially around the edges.
I am using A TS 107 Triplet with a 2 inch TS optics 0.79 focal reducer. EFW filterwheel and a Zwo asi1600mm pro Cmos camera.
By using the the adapters and adding them all up I get 56mm backfocus. According to this chart from TS Optics I need an extra 1mm.
Information from them here....
Back Focus - distances from the T2-thread to the camera sensor
depends on the focal length of the telescope:
♦ Focal Length to 350 mm .... 70 mm
♦ Focal Length to 420 mm .... 65 mm
♦ Focal Length 450-500 mm ... 61 mm
♦ Focal Length 510-600 mm ... 58 mm
♦ Focal Length 610-700 mm ... 57 mm
♦ Focal Length 710-790 mm ... 56 mm
♦ Focal Length from 800 mm .. 55 mmMy scope is 700mm So I am rigth on the end of one of those calculations.
Today I stripped everything down and checked everythintg. I was using a 1.2mm washer to get the extra 1mm distance but the washer was a hard plastic type and when I measured the gap it was more than 2mm.
I managed to find some soft type washers in my old ZWO box remove the old one and put a thinner one in which is giving me around 0.9mm gap. Giving me a total of 56.9mm. Instead of 58.1mm
Do you think that should fix the problem? Can 1.2mm out make my stars look like this or have I got another problem. Not had chance to take the scope out to test the new configuration due to the usual clouds.
Any help would be great. Single frame is of M3.
Thank you for any help in advance.
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It's all looking good! I appreciate the time you have put into this.
Thank you for that. It was all about producing better and better images which has happened. But perfecting each thing you do is very time consuming This is why this hobby is so fantastic. I need to spend more time watching whats going on rather then spend lots of time setting up and then leaving it on a plan for several hours doing nothing.
David
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At least we know they are not par focal all same manufacturer .
Blue was taken last and would have been coldest part of the night probably 3c less than when Lum was taken.
Order Lum R G B
David
M45
in Imaging - Deep Sky
Posted
More blue less saturation.