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Skewed photos

6 replies · 1,721 views · Started 26 July 2007

Peter321 26 Jul 2007, 18:38

I've noticed skewing in some pictures as well, no sure when it happens but it does happen (I can see people's faces being a bit skewed in group photos when they are near the edges - not in all photos but in some).

tonymy01 26 Jul 2007, 23:04

adz06 wrote:Hi

Just wondering if anyone else has had this, if you look at this pic, the top left and right of the image seems a bit skewed, I've noticed it on other pics too.

Unless its just my eyesight?


What am I missing with this photo? It looks normal to me, from the perspective you took the photo anyway. If you were midfield rather than at the end and took a photo straight across the field it would look straighter.
Actually, looking at it again I think I see where you are at. The building on the left is pretty close to vertical (which is not quite right given the field is not completely horizontal), but the building on the right has a lean to the right (so if the field was completely horizontal, the building on the left would lean a little to the left, the building on the right would lean a little to the right).
This is typical of a wide angle lense, where the lense distorts the image a little to get it all squeezed onto a flat surface. At least this is what I think you are referring to?

Regards

tonymy01 27 Jul 2007, 02:39

Ok, that is just wierd! So the answer to the "why do some of my pics look skewed" is "don't move the camera while taking a shot".
It must slowly scan horizontal lines of pixels or something? I wonder if you fiddle with the ISO mode whether this will help when in a situation where there is movement (or put it into sports mode or something similar).

adz06 27 Jul 2007, 11:48

You also notice the stands roof seems bowed, I can assure you, its not!

I can understand how perspective works etc, but surely the image should look the same as seeing it with your eyes?

There could have been bit of movement, but to be honest, I dont think I could hold any camera more still that when I took this.

I might try with a different camera next week and see what the results are. Having checked a picture from Thorpe Park, that didnt look distorted. I have only noticed it in pictures at Orient where there are a lot of straight lines where the buildings are.

Heres another pic taken from the same spot, but looking to left a bit.

http://www.beanwebb.com/orient2.jpg

This time the stand at the top looks like its bowed inthe other direction. And the building on the left looks the same as in the first pic.

neilhoskins 27 Jul 2007, 12:59

It's a very wide angle lens; I'd estimate 28mm equivalent in 35mm terms. That's all. If you want 'normal' perspective, equivalent to a 50mm lens in a 35mm camera, you'll have to zoom in a bit.