gluque
Topic Author
Posts: 12
Joined: Wed Nov 16, 2005 5:49 am

Vignetting And Rejecting Rules

Sun Nov 04, 2012 7:30 pm

Hello, first of all, sorry for my English...it´s elementary. I need your help....

I have just bought a new D800, and I have been using it with my lovely Sigma 120-300 HSM. I have been looking that this combination produces a lot of vignetting. I could remove the vignetting using a Camera Raw, but, when I equalized the photo (in PS) I could see a circular halo, which is not visible in the normal view.... In summaries, I can remove the vignetting in the normal view, but when I equalized the image I can see a circular halo just in the point where the original vignetting started. I need to know if this "halo", in the equalized view, is a rejection reason... I know that I can shoot in crop mode (in order to avoid the vignetting), but the idea is to take advantage of the powerful camera sensor.

Thanks and best regards from Argentina.
 
Silver1SWA
Crew
Posts: 4458
Joined: Wed Mar 10, 2004 6:11 pm

RE: Vignetting And Rejecting Rules

Sun Nov 04, 2012 8:02 pm

For this website you do not need that full resolution from the D800. You don't even need half!

I'm still relatively new to Full Frame myself and vignetting is something I still struggle to correct without showing signs of fixing it like you pointed out. Right now I stick to my 7D for most aviation stuff due to the crop.
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
dlowwa
Posts: 7168
Joined: Tue Apr 12, 2005 4:17 pm

RE: Vignetting And Rejecting Rules

Sun Nov 04, 2012 8:37 pm

Quoting gluque (Thread starter):
I need to know if this "halo", in the equalized view, is a rejection reason..

Yes, both vignetting and editing halos are reasons for rejection.
 
dazbo5
Posts: 2717
Joined: Tue Mar 29, 2005 8:05 am

RE: Vignetting And Rejecting Rules

Mon Nov 05, 2012 9:01 am

Just a suggestion, what apertures are you using? You may find if you use a smaller aperture, the vignetting reduces or dissapears. For example, on the Sigma 10-20 EX lens I use, vingetting is aparent until f/8. If the light is good enough, stopped down to f/10, there's no vingetting so you may be able to reduce the effect rather than having to remove it in post-processing.

Darren
Equipment: 2x Canon EOS 50D; Sigma 10-20 EX DC HSM, 50-500 EX APO DG, Canon 24-105 f/4 L, Speedlite 430EX
 
User avatar
ptrjong
Posts: 4102
Joined: Wed Mar 02, 2005 9:38 am

RE: Vignetting And Rejecting Rules

Tue Nov 06, 2012 11:39 am

Quoting dlowwa (Reply 2):

But you don't equalize images to check for things, or do you?
The only difference between me and a madman is that I am not mad (Salvador Dali)
 
User avatar
scbriml
Posts: 13357
Joined: Wed Jul 02, 2003 10:37 pm

RE: Vignetting And Rejecting Rules

Tue Nov 06, 2012 12:25 pm

Quoting ptrjong (Reply 4):
But you don't equalize images to check for things, or do you?

Speaking from personal experience during my short spell as a screener, not normally, no.

It's surprising how quickly a new screener becomes very good at seeing dust spots and halos without needing to equalise the image. I only ever equalised a couple of images I was screening and that was to look for suspected "illegal editing".

Quoting gluque (Thread starter):

Are you shooting jpeg or raw? One thing to watch out for on newer Nikons if shooting jpeg is that "Active D-Lighting" is turned off. It will often result in halos around aircraft, especially if shot against a blue sky. I don't believe the D-Lighting setting has any affect on raw files.
Time flies like an arrow. Fruit flies like a banana!
 
User avatar
alevik
Crew
Posts: 1193
Joined: Sat Mar 07, 2009 3:50 am

RE: Vignetting And Rejecting Rules

Tue Nov 06, 2012 6:33 pm

Quoting ptrjong (Reply 4):
But you don't equalize images to check for things, or do you?

No we don't equalize during screening - here is no tool to do this in the screening page, you would have to save the image and open in Photoshop. As noted we do sometimes do this, but rarely and not for simple things like halos or dust spots.

Halos and dust spots are typically seen by "grabbing" the image browser window and circling it. They show up quite readily then.
Improvise, adapt, overcome.
 
vikkyvik
Posts: 11801
Joined: Thu Jul 31, 2003 1:58 pm

RE: Vignetting And Rejecting Rules

Tue Nov 06, 2012 7:17 pm

Quoting alevik (Reply 6):
No we don't equalize during screening - here is no tool to do this in the screening page, you would have to save the image and open in Photoshop.

Just an FYI, you don't have to do that. You can drag an image from the web browser window right into Photoshop.  
I'm watching Jeopardy. The category is worst Madonna songs. "This one from 1987 is terrible".
 
mlevert
Posts: 33
Joined: Fri Oct 02, 2009 12:59 am

RE: Vignetting And Rejecting Rules

Wed Nov 07, 2012 9:58 pm

Quoting scbriml (Reply 5):
I don't believe the D-Lighting setting has any affect on raw files

I think it still does, however I've only noticed it on "flat" aircraft. Prior to learning that you need to turn the active D-lighting, I shot an airshow and all of the F-22 and B-2 I took pictures had halos when shooting RAW.
 
gluque
Topic Author
Posts: 12
Joined: Wed Nov 16, 2005 5:49 am

RE: Vignetting And Rejecting Rules

Fri Nov 09, 2012 9:21 pm

Hello, I appreciate your comments, they are very important for me. I know the problems with "D-Lightning" and I never use this tool. This week, I talked with some professionals about this problem, and I took a lot of advices. Some guys recommend me to use "Capture One" in order to edit the RAW files. They comment me that "Capture one" has a powerfully tool in order to reduce / avoid the vignetting. I don´t know if is true... but, next weekend I will send my comments. Thanks and best regards from Argentina.

Who is online

Users browsing this forum: No registered users and 5 guests