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Offline Jonneh

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Re: astrophotography
« Reply #120 on: December 27, 2016, 02:50:30 am »
finally some clear skies again
here is m42, this is my first proper image with the camera i made a while ago
focus was a little bit off :'(

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Online Bluestorm

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Re: astrophotography
« Reply #121 on: December 30, 2016, 07:16:15 pm »
Wow nice picture jonner!
this is the best topic I ever saw :o
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Offline Jonneh

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Re: astrophotography
« Reply #122 on: January 03, 2017, 05:38:36 pm »
another clear night last night (had some condensation/frost build up on the scope at some points though)
here is markarian's chain
taken with the camera i made, again
probably over 100 galaxies visible in this image (i cba to count though)

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Offline Charr

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Re: astrophotography
« Reply #123 on: January 03, 2017, 05:41:37 pm »
another clear night last night (had some condensation/frost build up on the scope at some points though)
here is markarian's chain
taken with the camera i made, again
probably over 100 galaxies visible in this image (i cba to count though)

http://i.imgur.com/uspbFEh.jpg
6/10 no bonus meteor
;

Offline Jonneh

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Re: astrophotography
« Reply #124 on: January 05, 2017, 03:06:34 am »
in progress image here is 2hrs 30mins of m81 and m82

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Offline Suryoyo K0

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Re: astrophotography
« Reply #125 on: January 05, 2017, 03:31:37 am »
in progress image here is 2hrs 30mins of m81 and m82


if you look closely, you can see that stars and galaxies are aligned perfectly as a penis

see http://i.imgur.com/SUUTY6N.jpg

man, space is crazy
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Offline Thomy

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Re: astrophotography
« Reply #126 on: January 05, 2017, 09:28:20 am »
Looking really cool. What resolution are your photos? I could try to put them as a skybox into emps. :D
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Offline Jonneh

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Re: astrophotography
« Reply #127 on: January 05, 2017, 04:13:17 pm »
Looking really cool. What resolution are your photos? I could try to put them as a skybox into emps. :D

most are around 3000x2000, I can go for higher resolutions by stitching multiple shots together like a panoramic though :)
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Offline Jonneh

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Re: astrophotography
« Reply #128 on: January 05, 2017, 04:24:05 pm »
finished shot of m81 and m82, total 4hr 30mins exposure time

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Offline Charr

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Re: astrophotography
« Reply #129 on: January 05, 2017, 04:38:54 pm »
I'm really disappointed with the lack of bonus meteors lately. Keep up the good work though!
;

Offline Papa Troq

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Re: astrophotography
« Reply #130 on: January 07, 2017, 10:48:42 pm »
Are those planets? Stars? I dont understand anything about our universum ;D

Offline Jonneh

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Re: astrophotography
« Reply #131 on: January 19, 2017, 04:19:13 am »
got me a new lens (samyang 135mm f2 http://i.imgur.com/HWWsBUa.jpg)
here is m31 andromeda galaxy with new lens (full res here http://i.imgur.com/Qa8vBvd.jpg)
55x 30s exposures, 28m 30s total exposure time

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Offline Jonneh

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Re: astrophotography
« Reply #132 on: January 19, 2017, 10:56:20 pm »
Just to give some sort of scale to the precision required for these images, this is part of the guiding graph from tonights session. The blue line is error on the RA axis, the red is the DEC axis. RA has more error since this is the one that actually rotates to counter the rotation of the earth. You can see from the scale on the left that the maximum error is about 1 arcsecond. this is roughly 0.000278° which is just under 1 millionth of a full rotation. Since no amount of engineering is going to make gears precise enough for this without being huge and very expensive, I use a technique called guiding which uses a second small camera/telescope to watch stars and continously correct for error, which is what the screenshot is of.

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Offline Jonneh

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Re: astrophotography
« Reply #133 on: January 20, 2017, 12:20:51 am »
one of tonights images, m42 in hydrogen alpha wavelength
full res http://i.imgur.com/FNQQgFj.jpg

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Offline Jonneh

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Re: astrophotography
« Reply #134 on: January 20, 2017, 02:08:42 am »
2nd image tonight, rosette nebula in hydrogen alpha wavelength
full res http://i.imgur.com/Sp7ozEF.jpg

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