Cool!! We have them here too, the bill is a strong pink color. I would love to get a picture of one too, but it seems whenever I see one, I don't have the camera with me.
Thanks Lois and Elande! If I hadn't had to rush away I possibly could have got a better angle.I know what you mean Lois. I could've taken world-quality photos on many an occasion when I didn't have my camera with me :D
I sometimes get shots with a purple outline (particularly white birds) very similiar to this and I was thinking chromatic aberration too.I started asking around and it was suggested that it might be the high contrast between the white bird and the dark background. I tried testing with a white piece of paper to see if shooting in the shadows made a difference, also tried different lenses, but was unable to reproduce the purple outline. The people who made the above suggestion thought shooting in RAW format would be helpful, but I have yet to try it.
If it is classic chromatic aberration, then the effect doesn't depend much on shadow vs sunlight, though it's less obvious with lower contrast. A larger lens and focal construction would improve it, as less refraction (due to being closer to perpendicular to the glass) means less variation in refraction across the visible wavelengths. That's one of the reasons you see really big lenses used for sports photography or by snooping paparazi. The other reason I expect you already understand is about total light capture (apperture vs shutter speed)Did you test with white subjects near the middle and the side of the picture? Does less zoom make it better, or just the same once blown up to the same viewing size?JPEG compression causes a different kind of effect that you're probably familiar with, and that would indeed be avoided in RAW.
It depends on what you are talking about I guess. The "glow" on the bird's neck on the left hand side of the bird does appear to be an aberration. On the other hand, the "glow" that I noticed on the tail, legs and the breast are actually due to real light effects. I know that because the following day in nearly identical conditions I noticed the exact same effect on a crow with my eyes and not through the camera lens. Of course between my glasses and eyes it is possible that my entire normal vision is an aberration.
Your glasses and your eyes will have the same effect, being refractors. When one colour is perfectly focused, the other colours are a bit out.If you've ever been somewhere with strong ultra-violet light plus some "white" light, you might remember everything having a purple "fuzz" around it. Perhaps in daylight, the red end of the spectrum is more noticeable. Or perhaps cackleberry's camera tends toward focusing red while Keith's prefers blue?
Thanks Gregbob!! That was very informative. I tested it with a 70-210 zoom, also a 28 -80 zoom in bright sunlight and in shadows, but was unable to reproduce the effect. It's also quite apparent while shooting pictures of birds high in the trees, but the branches as well as the birds have the same purple outline. I only tested near the middle of the picture as that was where my bird was. Attaching photos to illustrate. These two were taken within a few minutes of each other.
Cool!! We have them here too, the bill is a strong pink color. I would love to get a picture of one too, but it seems whenever I see one, I don't have the camera with me.
ReplyDeleteVery interesting!Great shot!
ReplyDeleteThanks Lois and Elande! If I hadn't had to rush away I possibly could have got a better angle.I know what you mean Lois. I could've taken world-quality photos on many an occasion when I didn't have my camera with me :D
ReplyDeleteApparently it is a Yellow Billed Spoonbill,Platalea flavipes, which is found on waterways throughout Australia.http://www.birdsinbackyards.net/finder/display.cfm?id=194
ReplyDeleteCOOL SHOT!!! the way the sunset is making the outline of the bed glow is fantastic, :P
ReplyDeleteI love it when the sun is low, and the light is nearly horizontal.
ReplyDeleteIt casts some very pretty light and soft shadows!
ReplyDeleteHm, chromatic aberration.. Was this zoomed a fair way, and not in the middle of the original picture?
ReplyDeleteI sometimes get shots with a purple outline (particularly white birds) very similiar to this and I was thinking chromatic aberration too.I started asking around and it was suggested that it might be the high contrast between the white bird and the dark background. I tried testing with a white piece of paper to see if shooting in the shadows made a difference, also tried different lenses, but was unable to reproduce the purple outline. The people who made the above suggestion thought shooting in RAW format would be helpful, but I have yet to try it.
ReplyDeleteIf it is classic chromatic aberration, then the effect doesn't depend much on shadow vs sunlight, though it's less obvious with lower contrast. A larger lens and focal construction would improve it, as less refraction (due to being closer to perpendicular to the glass) means less variation in refraction across the visible wavelengths. That's one of the reasons you see really big lenses used for sports photography or by snooping paparazi. The other reason I expect you already understand is about total light capture (apperture vs shutter speed)Did you test with white subjects near the middle and the side of the picture? Does less zoom make it better, or just the same once blown up to the same viewing size?JPEG compression causes a different kind of effect that you're probably familiar with, and that would indeed be avoided in RAW.
ReplyDeleteIt depends on what you are talking about I guess. The "glow" on the bird's neck on the left hand side of the bird does appear to be an aberration. On the other hand, the "glow" that I noticed on the tail, legs and the breast are actually due to real light effects. I know that because the following day in nearly identical conditions I noticed the exact same effect on a crow with my eyes and not through the camera lens. Of course between my glasses and eyes it is possible that my entire normal vision is an aberration.
ReplyDeleteYour glasses and your eyes will have the same effect, being refractors. When one colour is perfectly focused, the other colours are a bit out.If you've ever been somewhere with strong ultra-violet light plus some "white" light, you might remember everything having a purple "fuzz" around it. Perhaps in daylight, the red end of the spectrum is more noticeable. Or perhaps cackleberry's camera tends toward focusing red while Keith's prefers blue?
ReplyDeleteThanks Gregbob!! That was very informative. I tested it with a 70-210 zoom, also a 28 -80 zoom in bright sunlight and in shadows, but was unable to reproduce the effect. It's also quite apparent while shooting pictures of birds high in the trees, but the branches as well as the birds have the same purple outline. I only tested near the middle of the picture as that was where my bird was. Attaching photos to illustrate. These two were taken within a few minutes of each other.
ReplyDelete