It is currently Wed Nov 13, 2019 7:05 pm




Post new topic Reply to topic  [ 2 posts ] 
 Sigma 20mm f1.4 Art question 
Author Message

Joined: Wed Feb 24, 2016 5:49 am
Posts: 1
Post Sigma 20mm f1.4 Art question
Hello,
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
Profile
User avatar

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.

Steve

_________________
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
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © phpBB Group.
Designed by Vjacheslav Trushkin for Free Forums/DivisionCore. pozycjonowanie