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Shooting the Gap - first attempt at Milky Way on film
Lens: Pentax 43/1.9, 28/3.5 Camera: Pentax LX Photo Location: MN ISO: 800 
Posted By: chrodo7, 04-28-2022, 02:06 PM

Very pleased (and surprised) how well my first attempt at star-trail-free shots of the Milky Way on 35mm film came out. I'd been itching to finish off the roll I've had loaded in for the past month, and get out from under the blanket of clouds we've been covered with here for what seems like just as long. I saw there was a thin gap in the cloud cover forecast and decided to make the drive to take advantage of it. Both shot on my LX on Portra 800.

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04-28-2022, 04:59 PM   #2
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Good film shots of the Milky Way. How long was the exposure time. I'm impressed.
04-28-2022, 06:19 PM - 1 Like   #3
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Many thanks for the beautiful Astrophotography images. Brilliant.

Tony
04-28-2022, 09:28 PM   #4
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QuoteOriginally posted by MikeNArk Quote
Good film shots of the Milky Way. How long was the exposure time. I'm impressed.
Thank you! 15 min for the first shot, 8 min for the second

04-29-2022, 05:18 AM   #5
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Nice work. It even picked up some of the Hydrogen-alpha rich areas (red). The first shot looks sharper - I suspect lens abberations in the second shot. Nicely done for a first attempt.
04-29-2022, 06:22 AM   #6
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QuoteOriginally posted by ProfessorBuzz Quote
Nice work. It even picked up some of the Hydrogen-alpha rich areas (red). The first shot looks sharper - I suspect lens abberations in the second shot. Nicely done for a first attempt.
Thank you! And agreed, I loved how well the film captured the reds of some of the nebulas. You're correct as well on the lens aberrations in the second shot. Both lenses were shot wide open, but the 28/3.5 performed much better than the 43/1.9. At the expense of needing a longer exposure of course. You can really see some of the astigmatism of the 43mm in the Rho complex in the second shot
04-29-2022, 10:14 AM   #7
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Try stopping the 43 down 1 or 2 stops and see how it does.

04-29-2022, 10:46 AM   #8
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QuoteOriginally posted by ProfessorBuzz Quote
Try stopping the 43 down 1 or 2 stops and see how it does.
It looks better 1 stop down, though not by much. I'd guess there is significantly more improvement 2 stops down at f4, but then I'd be looking at an exposure time of half an hour for the same exposure (plus some for reciprocity)
https://www.lenstip.com/303.7-Lens_review-Pentax_smc_FA_43_mm_f_1.9_Limited_...tigmatism.html
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