rol
Posts: 74
Joined: Mon Feb 14, 2000 2:27 am

How To Improve This?

Sun Mar 30, 2003 10:37 pm

Fellow photographers!

My last upload was "without warning" and now this rejection because of low quality. Is it a dirty scan? (one of the reject reasons).

Kodak 100 Asa slide, scanned with 2820 dpi, Minolta dimage scan dual II, Nikon F 80, Sigma 80 - 300 AF 1:4-5,6, APO Macro Super; Speed 1/350 Sec.

Thanks for any comment
Roland


http://airliners.net/procphotos/rejphoto.main?filename=hlf739-2.jpg
 
wietse
Posts: 3630
Joined: Thu Oct 18, 2001 12:49 am

RE: How To Improve This?

Mon Mar 31, 2003 12:07 am

Hey,

What apperture was this? I see severe vignetting around the corners. When using cheap(er) lenses like sigma's you need to stop down a bit when shooting to prevent vignetting (dark corners). Try apperture priority at f6.7 or f8.

Wietse
Wietse de Graaf
 
User avatar
apuneger
Posts: 2964
Joined: Fri Sep 08, 2000 2:43 pm

RE: How To Improve This?

Mon Mar 31, 2003 12:07 am

Hmm, I can see more than one reason why this shot has been rejected:

- some grain
- dark edges around the corners (happens quite often with certain lenses AFAIK)
- some overexposure on the engine pod (in fact, it looks quite green to me)
- if you look at the edges of the airline's name 'Hapag Lloyd', the transition from red to blue isn't quite as should be. --> bad jpg compression?

Hope this helps,
Ivan
Ivan Coninx - Brussels Aviation Photography
 
jwenting
Posts: 9973
Joined: Mon Apr 23, 2001 10:12 pm

RE: How To Improve This?

Mon Mar 31, 2003 12:45 am

Bit of falloff around the edges. Did you have a hood on the lens? Most don't work well (even the ones that ship with the lens).
Bit of noise, shouldn't be a problem but on this site it is.
Seems a bit oversaturated too, at least compared to what the screeners like.
I wish I were flying
 
ola
Posts: 84
Joined: Thu Oct 25, 2001 9:53 pm

RE: How To Improve This?

Mon Mar 31, 2003 5:11 am

If you have Photoshop you can try to lighten those dark corners with Dodge tool. I don't know if that helps to get it uploaded, maybe, maybe not...

Nice shot by the way!  Smile
 
fuairliner
Posts: 530
Joined: Mon Jul 16, 2001 7:23 pm

RE: How To Improve This?

Tue Apr 01, 2003 4:46 am

Wietse wrote: "When using cheap(er) lenses like sigma's you need to stop down a bit when shooting to prevent vignetting (dark corners)."

This occasionally happens with more expensive lenses, too. Remember Sam's problems? And Sigmas are not always "cheap" lenses, they also produce quality f2.8 glass. As Wietse said correctly, I would never use an aperture of f5.6 with your lens. Start at f6.7 or f8. I would also recommend to use a lower shutter speed. For landing and take-off shots 1/180 of a second is sufficient.

Btw, another rejection reason would be "badinfo". Hapag-Lloyd doesn't own any Boeing 737-900, they only operate -800.


Frank
FU Airliner Photography
Frank Unterspann - Hamburg, Germany
 
rol
Posts: 74
Joined: Mon Feb 14, 2000 2:27 am

RE: How To Improve This?

Tue Apr 01, 2003 11:59 pm

Thanks for your replys.

Wietse, Frank:
Yes, it was f 5,6. That's obviously the reason for the vignetting in the corners. And Frank, you are right: The lens is not a bad lens, it is for example better than the lowest Nikkor series (G-Nikkor I think). I have the same effect with my 28-105 D-Nikkor at f 3,5.
Of course it is a B 737-800!

Today I made a print of the shot on my desk jet in 20x30 cm with high resolution. No grain, no noise, even the "Boeing 737-800" on the fuselage is clear and sharp legible. So you could think another reason for the rejection is the difficulty to scan and process an analog photo compared to a digital.

..and I only wanted to upload a photo from my home airport  Sad

Regards
Roland
 
wietse
Posts: 3630
Joined: Thu Oct 18, 2001 12:49 am

RE: How To Improve This?

Fri Apr 04, 2003 7:49 am

Frank,

I recall Sam's 80-400 and the remarks regarding that story; that it should not be like that on a pro lens. In general, you should always step down, to prevent vignetting, but also to prevent a too shallow DOF..

Wietse
Wietse de Graaf

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