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 Sigma 20mm f1.4 Art question 
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Joined: Wed Feb 24, 2016 5:49 am
Posts: 1
Post Sigma 20mm f1.4 Art question
I'm about to buy a Sigma 20mm f1.4 Art for my astro timelapses. And I want to know at what f-number (f1.4 or f2) should I shoot. I'm wondering because I know there will be some coma at f1.4 but if I close the aperture at f2 there will be flickering (or will there?). I've never experienced flickering because I've always been shooting at f2.8 which is the max aperture with my current lenses and practically it doesn't close and open for every shot.
So, which one should I choose in your opinion?

Sun Feb 28, 2016 6:18 am
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Joined: Wed Nov 25, 2009 1:17 am
Posts: 336
Location: Hindmarsh Valley, South Australia
Post Re: Sigma 20mm f1.4 Art question
What about trying it out and seeing what happens ? I doubt you'll get any issues because you will be doing long exposures which would probably iron out any small variations in the aperture flicker. Personally I don't use the full open on my lens because of the vignetting but then again I use manual lenses for star work. Tests are always the best way to go.


Amongst Myselves - ambient, landscape and space music
Canon 5Dm2, 450D, 17-40mm EF f4, 70-300mm L, 50mm f1.8 EF, Custom Intervalometer (UM9 and UM12) and MOCON, Meade LXD75 SN10

Sun Feb 28, 2016 2:53 pm
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