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Post by Deleted on Dec 16, 2019 13:55:56 GMT
Tried out the Astronomik 642 IR pass filter with the IMX432 on the deforked lx90 8" sct with night owl FR. First time I have used any of this stuff on the sct. Not sure how the 432 would go with the night owl without the filter. I am just pleased I finally have a system that works on the lx90 sct and I can get some images. Had previously been very disappointed with the sct and it had been relegated to visual use only. Have only used the imx 432 camera on the Rasa8 prior to this with no filter. Was unable to use any gain at all without overexposing on that scope. Added some gain on the system used tonight.Will try it without the filter next time. Images were stacked in sharpcap. No post processing. ngc 1097 15s x 41 stack ngc 1365 15s x 44 stack ngc 55 20s x 15 stack
and ngc 7552 ,one of Grus quartet 15s x20 stack cheers Paul
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Post by Dragon Man on Dec 16, 2019 15:10:37 GMT
Ooooo, NGC 1365 is my favourite from that batch Paul Very nice. Do you know what is causing the millions of lines across the first 2 images?
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Post by davy on Dec 16, 2019 15:56:08 GMT
No picking up the lines on my phone,, I had lots of phase lines on captures and I traced it to a noisy mains power supply adapter , bought a decent one and all good,, something to try if on mains power
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Post by Deleted on Dec 16, 2019 16:22:39 GMT
Do you know what is causing the millions of lines across the first 2 images? Gidday Ken Ive got no idea. It was on all the images. Will try the camera without the filter try and work out where it is coming from. Havent had much to do with the nightowl and zero with the filter. Happy I can finally get some images using the sct .It gives longer FL's than my other scopes ngc 253 was visible st 3secs but the longer exposures were whited out cheers paul
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Post by Dragon Man on Dec 16, 2019 16:52:55 GMT
No picking up the lines on my phone,, I had lots of phase lines on captures and I traced it to a noisy mains power supply adapter , bought a decent one and all good,, something to try if on mains power Yes Davy, it does have the appearance of interference.
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Post by Deleted on Dec 16, 2019 22:54:36 GMT
Thanks Ken and Davy.The powerboard has one faulty socket which I have just noticed. I will change that and change the power supply to the Heq5 .
By the way, I am much happier with the lx90 deforked and off the alt/az mount.I keep reading that alt/az is all you need for video astronomy. Dont agree with that any more. As you have said ,Ken, you dont need to polar align every session for videoastronomy either.
If it is clear tonight I will see how the 432 and night owl come up without the ir pass filter.That was the first time I used that particular kit and dont really have any feel for the contributions of the components. cheers Paul
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elpajare
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Post by elpajare on Dec 17, 2019 8:18:14 GMT
Thanks for sharing these photos. There are very few people who have this mono camera that in theory is the most sensitive in the market.
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Post by Deleted on Dec 17, 2019 12:34:00 GMT
Like you Carlos,I enjoy trying to get detail in the smaller,dimmer galaxies. The 432 is the best camera I have for that purpose. I only wish it came in a non cooled version. The cooled is big and heavy which I think is not needed for videoastronomy.Those 3 to 4 arcminute galaxies come up too small with the 432(and the 294 for that matter) on the Rasa. The 290 suits that purpose better. Thats why I want to pursue the longer focal length and smaller FOV of the lx90 with the 432 and see what I can come up with. The skies were not kind to me tonight so I did not get a chance improve on last night's efforts cheers Paul
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Post by davy on Dec 17, 2019 13:13:09 GMT
Thanks Ken and Davy.The powerboard has one faulty socket which I have just noticed. I will change that and change the power supply to the Heq5 . By the way, I am much happier with the lx90 deforked and off the alt/az mount.I keep reading that alt/az is all you need for video astronomy. Dont agree with that any more. As you have said ,Ken, you dont need to polar align every session for videoastronomy either. If it is clear tonight I will see how the 432 and night owl come up without the ir pass filter.That was the first time I used that particular kit and dont really have any feel for the contributions of the components. cheers Paul What's polar alignment lol. Uncle John has deforked his lx90 his sits on the eq8 😊 very impressive
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elpajare
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Post by elpajare on Dec 18, 2019 8:22:05 GMT
Like you Carlos,I enjoy trying to get detail in the smaller,dimmer galaxies. The 432 is the best camera I have for that purpose. I only wish it came in a non cooled version. The cooled is big and heavy which I think is not needed for videoastronomy.Those 3 to 4 arcminute galaxies come up too small with the 432(and the 294 for that matter) on the Rasa. The 290 suits that purpose better. Thats why I want to pursue the longer focal length and smaller FOV of the lx90 with the 432 and see what I can come up with. The skies were not kind to me tonight so I did not get a chance improve on last night's efforts cheers Paul Yes, the FOV is definitive when it comes to capturing these important details in small galaxies (about 60% of the total objects of magnitude 12 or less in the Northern Hemisphere!). I would like to know your opinion about the sensitivity of this chip compared to the IMX294C. In theory it is more sensitive ... Thank you for your time and merry Christmas!
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Post by Deleted on Dec 18, 2019 10:09:40 GMT
Carlos,I suppose the best way to compare the sensitivity of the 2 cameras will be to pick a small low magnitude galaxy and do the best image I can . I notice you have got to magnitudes of 16. I have never attempted anything that dim so will start with something brighter. Trouble is ,I will be on a beach holiday next week for 3 weeks. Might have to take the lx90 and HEQ5 rather than my grab and go kit. cheers Paul
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Post by Dragon Man on Dec 18, 2019 12:47:10 GMT
What's polar alignment lol. It's when you point the scope to a place in the Northern (or Southern for us better people ) Celestial Polar area and move it around a bit for about half an hour in frustration, then say 'That'll do!'
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elpajare
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Post by elpajare on Dec 18, 2019 16:42:16 GMT
Carlos,I suppose the best way to compare the sensitivity of the 2 cameras will be to pick a small low magnitude galaxy and do the best image I can . I notice you have got to magnitudes of 16. I have never attempted anything that dim so will start with something brighter. Trouble is ,I will be on a beach holiday next week for 3 weeks. Might have to take the lx90 and HEQ5 rather than my grab and go kit. cheers Paul Easier, don't worry. Any object is worth it, I just want to know if you need less exposure with one camera than with the other to photograph the same thing. For example, with my RC8 I need 25 seconds with maximum gain to photograph a weak galaxy, 15 seconds for an open cluster and 10 seconds for a star. I would like to know if this camera can reduce the exposures.
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Post by Deleted on Dec 19, 2019 6:12:08 GMT
Carlos, I have only used the 432 on 3 occasions.2 on the Rasa and 1 on the lx90. On the Rasa without a filter , the gain had to set at minimum for any exposure over about 5 seconds otherwise the histogram moved right and I was overexposed. On the lx90 I had the night owl FR plus the IR pass filter and I could put the gain about half way with exposure 20 secs or more. The gain numbers are a bit confusing as the Risingcam 432 was used with Sharpcap and the gain numbers are different than using ZWO cameras on Sharpcap. The weather has not been kind to us this week. I will be on holiday and will only be able to compare the 432 with the 294 on the Esprit 80. Havent got room in the car for the bigger scopes.The scope that would give you the info that you want would be the 8" f/10 lx90 but I have to leave that at home cheers Paul
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elpajare
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Post by elpajare on Dec 19, 2019 8:04:38 GMT
I've already had an idea of the subject, don't worry.
The sensitivity of this chip is comparabe to 294 or perhaps higher.
I don't need more and thanks for answering, Paul
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Post by davy on Dec 19, 2019 8:30:42 GMT
What's polar alignment lol. It's when you point the scope to a place in the Northern (or Southern for us better people ) Celestial Polar area and move it around a bit for about half an hour in frustration, then say 'That'll do!' Right,, na don't bother with that lol.. I can never see the pole star from my flat window,,, ive done it a couple of times roughly,, point Google sky map at it and very roughly get position.. Then try and do star alignment... In the early days.. But my fov is so small I basically point and shoot.. Video wise I don't mind manually tracking Astrophotography I try and track,, but I only do lunar so it's not a big deal for me,, done it that often,, could do it with my eyes shut
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Post by Deleted on Dec 19, 2019 10:54:39 GMT
Carlos,my impression is that the 432 is a lot more sensitive than the 294 but I havent had an opportunity to compare them yet. I want to compare them anyway so I will post a few images when I get that opportunity.
Davy, I had all sorts of trouble with polar alignment until Sharpcap came along. It is now very straightforward but I have found very accurate polar alignment is not necessary for what we do. Accurate 2 star alignment is worthwhile however. cheers Paul
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Post by Deleted on Dec 20, 2019 9:09:34 GMT
I am a bit over the weather. If we have to put up with 45 celcius , then at least give us some clear skies. That high cirrus cloud drives me to drink. Who should I complain to ? cheers Paul
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Post by Dragon Man on Dec 20, 2019 14:32:34 GMT
I am a bit over the weather. If we have to put up with 45 celcius , then at least give us some clear skies. That high cirrus cloud drives me to drink. Who should I complain to ?cheers Paul Thor the Thunder God
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Post by davy on Dec 21, 2019 9:06:32 GMT
I am a bit over the weather. If we have to put up with 45 celcius , then at least give us some clear skies. That high cirrus cloud drives me to drink. Who should I complain to ? cheers Paul Scotland will take half of your 45 degrees and swap you couple of billion gallons of rain water,,, offer must be accepted before Christmas lol
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