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Re: Field Review: Sigma 120-300 F2.8 OS Lens [Re: James Morrissey] #37481
11/24/11 08:26 PM
11/24/11 08:26 PM
Joined: Nov 2008
Kansas
psmith Offline
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psmith  Offline
Pooh-Bah

Joined: Nov 2008
Kansas
Does ACR have a lens profile for this lens? If so, did it correct the problem? It does a good job with some of the canon lenses.

Re: Field Review: Sigma 120-300 F2.8 OS Lens [Re: psmith] #37482
11/24/11 08:50 PM
11/24/11 08:50 PM
Joined: Feb 2005
Manhattan, New York, New York
James Morrissey Offline OP
I
James Morrissey  Offline OP
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Carpal Tunnel

Joined: Feb 2005
Manhattan, New York, New York
Hey Preston,

I use Capture One for my raw files, not ACR. I don't particularly like the color conversions out of ACR as much as Capture One. CO does indeed have a light fall off adjuster that works great. Another point - that much of the problems (like vignetting) can be adjusted in the raw software.

James

Re: Field Review: Sigma 120-300 F2.8 OS Lens [Re: James Morrissey] #37483
11/24/11 09:03 PM
11/24/11 09:03 PM
Joined: Mar 2005
Florida
Jim Garvie Offline
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Jim Garvie  Offline
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Florida
Quote:
much of the problems (like vignetting) can be adjusted in the raw software.


Or, depending on the camera, with Peripheral Lighting Adjustment in the camera itself. But, yes, I agree with Preston that vignetting would be much less a problem on a crop body and, regardless, you can adjust for it either in-camera or in software. Such are some of the many advantages of digital.

Jim


Jim Garvie
www.jagphoto.biz
Re: Field Review: Sigma 120-300 F2.8 OS Lens [Re: Jim Garvie] #37485
11/25/11 04:04 PM
11/25/11 04:04 PM
Joined: Feb 2005
Manhattan, New York, New York
James Morrissey Offline OP
I
James Morrissey  Offline OP
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Carpal Tunnel

Joined: Feb 2005
Manhattan, New York, New York
Hey Jim,

I think that peripheral lighting adjustment only applies to the jpeg files, yes? Next week, when I get some time, I may reprocess the images I shared above with the light fall-off adjustment in Capture One.

James

Re: Field Review: Sigma 120-300 F2.8 OS Lens [Re: James Morrissey] #37496
11/26/11 01:33 PM
11/26/11 01:33 PM
Joined: Mar 2005
Florida
Jim Garvie Offline
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Jim Garvie  Offline
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Joined: Mar 2005
Florida
James,
yes it is but you can apply the same correction in DPP or, frankly, most of the RAW processing software including ACR. Don't know for sure what it's called in Capture One but I'd be real surprised if it's not there.

Jim


Jim Garvie
www.jagphoto.biz
Re: Field Review: Sigma 120-300 F2.8 OS Lens [Re: Jim Garvie] #37498
11/27/11 03:51 PM
11/27/11 03:51 PM
Joined: Mar 2005
Florida
Jim Garvie Offline
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Jim Garvie  Offline
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Joined: Mar 2005
Florida
According to the Capture One "help files", it's called the Light Falloff" adjustment.

Jim


Jim Garvie
www.jagphoto.biz
Re: Field Review: Sigma 120-300 F2.8 OS Lens [Re: Jim Garvie] #37501
11/28/11 01:58 AM
11/28/11 01:58 AM
Joined: Feb 2005
Manhattan, New York, New York
James Morrissey Offline OP
I
James Morrissey  Offline OP
I
Carpal Tunnel

Joined: Feb 2005
Manhattan, New York, New York
Hey Jim,

Thanks! I know it is there, I originally chose not to do make light fall off corrections in pp because I wanted to show what the lens would do natively. I will definitely go back and add these files later (probably next weekend as I am off to Saratoga for the next few days) and see how they look.

James

Re: Field Review: Sigma 120-300 F2.8 OS Lens [Re: James Morrissey] #38475
03/20/12 03:24 PM
03/20/12 03:24 PM
Joined: Mar 2012
Wales, UK
HollyRuthven Offline
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HollyRuthven  Offline
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Joined: Mar 2012
Wales, UK
A great read, thank you. I've been contemplating this lens due to it's reasonable price and the fact that it's apparently sharper than it's prime counterpart!

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