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Pleiades star cluster and interstellar dust (astrotracer)
Lens: Samyang 135 Camera: Pentax K-1 Mark II Photo Location: French Alps ISO: 800 Shutter Speed: Above 6s Aperture: F2 
Posted By: Dan Paris, 01-01-2020, 05:11 AM

Hi,

A long exposure time was necessary to make the very faint glow of interstellar dust visible.







142 frames of 30 sec each with astrotracer, together with 60 calibration frames (darks, biases, flats)

regards,

Dan

Last edited by Dan Paris; 01-01-2020 at 04:21 PM.
Views: 543
01-01-2020, 06:12 AM   #2
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How long does that take you in total?
Capture and processing?
01-01-2020, 07:22 AM   #3
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Great shot, I really appreciate astrophotography.
01-01-2020, 10:05 AM   #4
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Subaru

01-01-2020, 12:43 PM   #5
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This is an amazing photo! Thanks for sharing.
01-02-2020, 10:00 AM - 1 Like   #6
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thanks everyone for your kind messages


QuoteOriginally posted by -JW- Quote
How long does that take you in total?
Capture and processing?
Setup : 5 minutes (going outside to the parking lot, pointing and focusing)
Capture : 71 minutes of total exposure
Dark frames : 15 minutes of total exposure
flats and biases : 5 minutes
Processing : the preprocessing script runs for 20 minutes but I've nothing to do. After that, processing is as any photograph
01-02-2020, 11:00 AM   #7
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Great shot, I'm beginning to appreciate the effort put into these photos. Thanks for sharing!
01-02-2020, 05:05 PM   #8
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The Final Frontier and you have done a stellar job in capturing and processing it. Many thanks for the treat.

TT

01-03-2020, 05:03 AM   #9
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Thanks a lot Vmax911 and Tonytee,

Dan
01-03-2020, 03:23 PM   #10
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It still amazes me how many stars are visible in theses images, stars I've never seen with the naked eye. How many stars in the Pleiades, would you say now?
01-03-2020, 08:29 PM   #11
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Nice Pleiades image. It shows the dust cloud that they are traveling through quite well. Definitely worth the time and effort. Well done. Thanks.
That Samyang 135 is quite an astro lens, with zilcho coma, eh? Love mine.
01-03-2020, 08:34 PM   #12
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I know this type of photography is a niche market, but Pentax/Ricoh has this down COLD! Exceptional image and the equipment I am sure made it easier (though with 142 images, 30 seconds each, plus calibration frames, that's like 2 hours of photography in the cold of the Alps is not easy).
01-04-2020, 02:33 PM   #13
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Thanks a lot StiffLegged, TedH42 and BigDave for your kind messages.


QuoteOriginally posted by StiffLegged Quote
It still amazes me how many stars are visible in theses images, stars I've never seen with the naked eye. How many stars in the Pleiades, would you say now?
I started to count them, I should have finished before the end of next week

QuoteOriginally posted by TedH42 Quote
That Samyang 135 is quite an astro lens, with zilcho coma, eh? Love mine.
Yes, it is amazingly good for the price ! I was bothered by the strong vignetting but with properly done flat-field frames it completely disappears




QuoteOriginally posted by BigDave Quote
that's like 2 hours of photography in the cold of the Alps is not easy).
That's actually the best part of it ! Enjoying a silent night under a moonless dark sky, surrounded by beautiful mountains...
01-08-2020, 10:07 AM   #14
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QuoteOriginally posted by Dan Paris Quote
thanks everyone for your kind messages




Setup : 5 minutes (going outside to the parking lot, pointing and focusing)
Capture : 71 minutes of total exposure
Dark frames : 15 minutes of total exposure
flats and biases : 5 minutes
Processing : the preprocessing script runs for 20 minutes but I've nothing to do. After that, processing is as any photograph
So about two hours.
And at what point do you know if the image is going to be worthwhile?
Do your for instance first snap a photo at a very high ISO to get a basic idea?
01-08-2020, 10:43 AM   #15
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Outstanding.
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