Another "whats causing this?" thread..

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younggordon

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Hi,
I took this photo over the weekend and i was wondering abotu the two effects you can see.

1st - the horizon has a curve to it?
2nd - why has the right hand side of the pciture washed out?

Camera 450D
lens 18-55mm IS kit lens
hoya uv filter
f/9
1/50sec
ISO - 100



Thank you.

Gordon
 
The curved 'effect' is you using your widest setting on your lens and getting barrel distortion, plus a little curvature of the earth added in because you are so high. ;)

Were you using a Polariser? If so, the Polarising effect sometimes doesn't work across the whole of the scene at very wide angles. You should be able to see the effect happening as you rotate the Polariser to get the most pleasing effect, placing the darkest blue sky in the centre for example.

If you weren't using a Polariser then I don't know what went wrong with the sky.



Edit -- Just re-read your post and seen that you were using a UV filter. A Polariser could have been the answer though. :lol:
 
The horizon has a curve because the earth is curved. There could also be barrel distortion which is amplifying this effect. It is quite common on zoom lenses at their widest end, where straight lines are curved by the lens. This can be corrected with some post processing.

As for 'washed out' I'm guessing the sun was somewhere to your right when taking this picture?

Nice picture btw, anywhere nice?

Edit: Dang, beaten to it, must learn to type more quickly!!
 
Ok, thanks for that,

The sun was actually to the behind left of me.

Photo is of Fornells bay in Menorca from the top of Mount Toro, (highest point on the island)

Gordon
 
younggordon said:
Ok, thanks for that,

The sun was actually to the behind left of me.

Photo is of Fornells bay in Menorca from the top of Mount Toro, (highest point on the island)

Gordon
Click to expand...

Ok I still know nothing then!! :thinking:

Looks gorgeous. :)
 
Barrel distortion and that looks very like a polarising filter effect on the sky. If you didn't have one of those fitted, was it shot through glass?
 
benhaha85 said:
The horizon has a curve because the earth is curved.
Click to expand...

You can't see the curvature of the earth from this kind of level that the photo was taken at. If we follow that logic for a moment, as we moved further and further around the points of the compass, the horizon would continue to drop in a spiral until eventually it fell into nothingness - but that is not how it works! The slight bend that you can see here is not curvature of the earth but in fact barrel distortion.
 
trencheel303 said:
You can't see the curvature of the earth from this kind of level that the photo was taken at. If we follow that logic for a moment, as we moved further and further around the points of the compass, the horizon would continue to drop in a spiral until eventually it fell into nothingness - but that is not how it works! The slight bend that you can see here is not curvature of the earth but in fact barrel distortion.
Click to expand...

:bonk: Yep you're right. Friday afternoon brain melt. :lol:
 
I can only imagine the sun was to the left of the pic thuis causing the circle of loss of sky colour.
A polarizing filter might have helped but it might have made the left of the photo too dark.
best thing to do when this happens is reduce it as much as possible in processing like below.
It does not get rid of it as to do so would cause the left of the pic to be too dark but it helps
4504826017_3f48b5398d_o.jpg
 
Is it shot from a cable-car?
 
I've noticed that when taking photos the sky is always a deeper blue at 90 degrees to the sun even without a polarising filter. The sun and opposite the sun is always slightly more washed out. I may or may not be wrong but that's a general observation I've made.

Trev
 
Raider that looks great, how did you do that?

Hoppy, taken outside with it resting on a wall.

Gordon
 
younggordon said:
Raider that looks great, how did you do that?

Hoppy, taken outside with it resting on a wall.

Gordon
Click to expand...

I use Adobe lightroom, you can download a 30 day trial here,

https://www.adobe.com/cfusion/tdrc/index.cfm?product=photoshop%5Flightroom

I think it is the best thing since sliced bread, if you want me to do the same to a large file so you have it as it is on here send me a PM and ill send you my email so you can send the file, ill convert it and send it back.

By the way 18mm @ F9 ISO 100 was a good shout i would probably have gone f16 and it might have come out too dark.
Tony
 
younggordon said:
....The sun was actually to the behind left of me.
Click to expand...

I think you're mistaken on this one, the shadow of the tree line is falling towards the shooting position slightly. This indicates that the sun was left and forwards of you.

Bob
 
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