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Old 07-09-2022, 09:47 PM
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Doogs38 (Alex)
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Join Date: Jan 2013
Location: Brisbane, Australia
Posts: 438
NGC2070 Tarantula Nebula

This is not a good image - it's slightly out of focus, has only 1hr50m of subs and a quick edit to only reduce noise and enhance the gas/dust clouds. But I thought I'd share it regardless as it's my very first attempt at using a dual narrowband filter and I'm gobsmacked at what can be captured. I've viewed the Tarantula on many occasions using my dob with a medium power eyepiece and have always enjoyed the intricate detail. But you can't see it like this!

Things I learnt this time around:
a. It's a very bright target and will easily blow the highlights at the centre of the nebula (even with a NB filter).
b. Ekos had trouble accurately autofocusing the Tarantula as everything is so bright which obscures the stars, and instead Ekos attempts to focus on gas/dust clouds. The result is poor focusing without manual intervention of focusing parameters, which I'm still learning to do. [Next time, I might achieve a good focus using stars adjacent the LMC and keep that focus for the entire session rather than fiddling with autofocus at intervals during the session.]

SW120ED x 0.85 Reducer/Flattener
22 x 300s Antlia Dual NB, ASI294MC
Darks, flats, dark flats. APP, PS, DeNoise and cropped.

Thanks for looking. Alex
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Last edited by Doogs38; 12-09-2022 at 08:19 PM.
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