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Photography F.A.Q (Last Updated: 2025 Jan 22 8:17 pm)




Subject: Blonde # 4

PeeWee05 opened this issue on Nov 29, 2005 · 7 posts
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PeeWee05 ( ) posted Tue, 29 November 2005 at 7:23 AM · edited Thu, 23 January 2025 at 12:01 AM

So I've been reading that some ppl say they get curved - straight lines when shooting in macro... Is this possible coz I ain't ever seen it...

Rights Come With Responsibilities VAMP'hotography Website VAMP'hotography Blog

Onslow ( ) posted Tue, 29 November 2005 at 9:24 AM · edited Tue, 29 November 2005 at 9:38 AM

In photographs all straight lines are curved due to lens distortion. How much they are curved is the significant question. Most of the time it is an insignificant amount that does not detract from the overall image.
Look at a photograph taken with a fish-eye lens you will see what is going on in an exaggerated form, when you take a pic. of something close to the lens front. The perspective is all out which is why it is always best to take portrait shots of people with a longer lens ;) it is much more flattering. All those models in the fashion mags havn't got little button noses, but I bet the photographer has got a telephoto lens!
Or try taking a photograph of water with a perfectly level horizon (I'm ignoring earth curvature) eg the sea or a lake where you cannot see the other shore. Maybe place the horizon a third up the pic as is often done. Now go back to your image editor on the pc and draw a straight line along the horizon.
Some lenses are better than others at controlling the distortion. You can get software to correct the image if the curvature is so much that it detracts from the image but in most cases no one will ever notice unless it is really pronounced.

Message edited on: 11/29/2005 09:38

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html

TwoPynts ( ) posted Tue, 29 November 2005 at 10:26 AM

file_307968.jpg

Here is an example. We know that this door is made of of perfectly straight lines at right angles. I place green guide lines so that you can see the curvature caused by the lens distortion. Some lenses are better than others, and the wider the angle, the more distortion - usually.

Kort Kramer - Kramer Kreations

Margana ( ) posted Tue, 29 November 2005 at 10:40 AM

Thanks guys.Very well explained! :^)

Marlene <")

Marlene S. Piskin Photography
My Blog

"A new study shows that licking the sweat off a frog can cure depression. The down side is, the minute you stop licking, the frog gets depressed again." - Jay Leno

Onslow ( ) posted Tue, 29 November 2005 at 10:43 AM

Thought it was going to be your all singing and dancing demo Kort ;) That was good - it is in a thread here somehwere!

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html

TwoPynts ( ) posted Tue, 29 November 2005 at 1:33 PM

Heheh, if you find it let me know! ;]

Kort Kramer - Kramer Kreations

PeeWee05 ( ) posted Wed, 30 November 2005 at 1:19 AM

Thanks guys, I'll go back and look at some of my sea shots and see if I can catch it... So wide lenses yes! but it shouldn't be pronounced with a macro lens? I'm sure someone else has asked the question before but like TP says, you go find it :D

Rights Come With Responsibilities VAMP'hotography Website VAMP'hotography Blog

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