Wietse From Netherlands, joined Oct 2001, 3809 posts, RR: 56 Reply 1, posted (10 years 8 months 1 week 6 days 9 hours ago) and read 3005 times:
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.
Apuneger From Belgium, joined Sep 2000, 3030 posts, RR: 12 Reply 2, posted (10 years 8 months 1 week 6 days 9 hours ago) and read 2990 times:
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?
Jwenting From Netherlands, joined Apr 2001, 10213 posts, RR: 20 Reply 3, posted (10 years 8 months 1 week 6 days 8 hours ago) and read 2999 times:
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.
FUAirliner From Germany, joined Jul 2001, 538 posts, RR: 3 Reply 5, posted (10 years 8 months 1 week 5 days 4 hours ago) and read 2874 times:
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.
Rol From Germany, joined Feb 2000, 76 posts, RR: 0 Reply 6, posted (10 years 8 months 1 week 4 days 9 hours ago) and read 2847 times:
Thanks for your replys.
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
Wietse From Netherlands, joined Oct 2001, 3809 posts, RR: 56 Reply 7, posted (10 years 8 months 1 week 2 days 1 hour ago) and read 2813 times:
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..