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Old 15-08-2019, 01:33 PM
casstony
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Swan and M27, full moon & L-Enhance filter

I got a rare clear night but with a full moon, perfect time to stress test the L-Enhance filter. Both targets were just far enough away from the moon that it's light wasn't directly hitting the objective. M27 was low over the roof of our house.

I kept exposures a little shorter because of the moon.
TS115 @f/5.6, Nikon D5600 @ISO400, Optolong L-Enhance filter
M17: 16x5 min
M27: 14x5 min
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Old 15-08-2019, 02:18 PM
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Excellent images Tony.
I am really starting to envy your equipment the results are fantastic.
Alex
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Old 15-08-2019, 03:14 PM
casstony
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Thanks Alex. The aspect I like best about my gear is ease of use, even if it won't reach the quality of a mono camera.
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Old 15-08-2019, 03:33 PM
Startrek (Martin)
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Tony
These are excellent images considering the moon glare in general
Well done !
Martin
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Old 15-08-2019, 03:59 PM
casstony
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Thanks Martin. I can certainly recommend the filter. I hope Optolong are working on an even narrower band filter similar to the Triad Ultra, but half the price.
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Old 15-08-2019, 04:01 PM
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Quote:
Originally Posted by casstony View Post
Thanks Alex. The aspect I like best about my gear is ease of use, even if it won't reach the quality of a mono camera.
Yeh but why worry..when it all boils down we only ,even with the best mono filter set up, grab a small hint of the EMS.. The mono thing is just so much effort..I am happy to be there but....the fact is your results are damn good and a fantastic return on investment and work input...
Alex
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Old 15-08-2019, 04:45 PM
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These are absolutely stunning Tony. You have an amazing collection of images. Thanks for sharing.
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Old 17-08-2019, 10:47 PM
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Amazing depth in the image of M17 Tony, & good to see the 115 getting some starlight. I've resisted the urge to invest in a LP filter but these results are impressive. Thanks for posting.
Cheers,
Tony
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Old 19-08-2019, 06:23 PM
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Thanks guys, I had another go at M17, this time 9x7 minutes and a little different processing. Star colours would nicer without the harsh filter, but it's a significant advantage when the moon's about.
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Old 19-08-2019, 07:36 PM
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Tony , The L-Enhance filter is something else Eh Amazing results!!I will look at the specs..... Your FOV is wide !! One question , why only ISO400. I've also resolved to not go down the Mono /RGB filter path like Alex as I just don't have/not will to spend that extra time.... X x 5min.. I'm wanting to get to 5 seconds There must be a standard bench mark for total photons/min or something similar that would assist......
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Old Yesterday, 12:14 AM
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Even better Tony

Quote:
Originally Posted by Zubenel View Post
Tony , The L-Enhance filter is something else Eh Amazing results!!I will look at the specs..... Your FOV is wide !! One question , why only ISO400. I've also resolved to not go down the Mono /RGB filter path like Alex as I just don't have/not will to spend that extra time.... X x 5min.. I'm wanting to get to 5 seconds There must be a standard bench mark for total photons/min or something similar that would assist......
This https://www.youtube.com/watch?v=3RH93UvP358 YouTube Vid deals with that very issue Wes. It's mainly aimed at CMOS/CCD imaging but you can apply the CMOS principals to your DLSR. The nuts & bolts part is towards the end if you can sit through it. I had to watch it a couple of times to get my head around the theory but it's well worth it. DR Robin Glover is the speaker. You could also google "optimum sub exposure length/ astrophotography' or similar, there's plenty of info out there.
Cheers,
Tony

Last edited by Ant0nio; Yesterday at 12:18 AM. Reason: Added text
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Old Yesterday, 08:38 AM
casstony
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Originally Posted by Zubenel View Post
, why only ISO400. ....
Each camera has an ideal ISO where noise is minimal but dynamic range is highest and for my camera that's either ISO 200 or 400.

It just occurred to me that the ISO/dynamic range might not be as important when using a narrow filter though - I might have to research that.
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