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8-15mm f2.8 vs 14mm f2.8?
Oct 1, 2016 11:44:22   #
cosmo54 Loc: Easton, PA but will travel for photos
 
I'm just starting to attempting night star photography. I have a 16-35 f/4 and a 8-15 f/2.8.
I am thinking about getting the 14mm f/2.8 Rokinon, but am wondering if I use my 8-15, would I be able to correct the fish eye affect using Photoshop or Lightroom? I don't know much about either program, but am willing to learn. Or is it easier to just buy the Rokinon? Its pretty inexpensive.

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Oct 1, 2016 12:20:15   #
skylane5sp Loc: Puyallup, WA
 
Check out this blog. He does amazing work and has done a lot of lens testing. He shows that that Rokinon performs better for this use (less coma) than the comparable Canon costing 4-5x more. http://intothenightphoto.blogspot.com

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Oct 1, 2016 12:35:08   #
cosmo54 Loc: Easton, PA but will travel for photos
 
Thanks for the reference. I had no intention of buying another Canon lens, I am wondering if my current 8-15 f/2.8 after correction in photoshop, would be relatively as good as the Rokinon 14 f/2.8 sooc.
And if i go for the Rokinon, should I bother with the chip version or not?

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Oct 1, 2016 12:51:26   #
skylane5sp Loc: Puyallup, WA
 
cosmo54 wrote:
And if i go for the Rokinon, should I bother with the chip version or not.
Getting good focus in the dark is difficult. I the chip version can help with that, why not?

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Oct 1, 2016 13:13:19   #
cosmo54 Loc: Easton, PA but will travel for photos
 
skylane5sp wrote:
Getting good focus in the dark is difficult. I the chip version can help with that why not?
Dont really use autofocus for night sky photography, and the chip version is more money. :-)

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Oct 1, 2016 14:06:55   #
CraigFair Loc: Santa Maria, CA.
 
Hello Janyce, I have a 16-28mm Lens I use set at 16mm f/2.8, and find it to be the widest angle I would want to use. I use lens correction in Lightroom and get some pretty good processing that way. The 8-15mm f/2.8 set to 15mm f/2.8 is the Lens I would use. I have had a Rokinon lens and wasn't very satisfied with it. Inexpensive gets inexpensive shots. I hope you don't mind me posting a shot I've taken.

Milky Way 16mm f/2.8
Milky Way 16mm f/2.8...
(Download)

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Oct 1, 2016 14:55:32   #
skylane5sp Loc: Puyallup, WA
 
cosmo54 wrote:
Dont really use autofocus for night sky photography, and the chip version is more money. :-)
That lens is manual focus and the chip gives you focus confirmation. If that's worth the extra $160 or so... nah.
Me? I get a good manual focus at dusk and use some blue painter's tape to lock it.

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Oct 1, 2016 15:43:23   #
CraigFair Loc: Santa Maria, CA.
 
skylane5sp wrote:
That lens is manual focus and the chip gives you focus confirmation. If that's worth the extra $160 or so... nah.
Me? I get a good manual focus at dusk and use some blue painter's tape to lock it.
That's a very good technique Skylane.

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