What happened here? The castle is leaning!
Oct 21, 2012 22:50:39 #
I shot this with a T3, 24-105L lens, ISO 100, F 4.50, 24 focal length, Shutter speed 1/50.
Why is the castle leaning on the right? Did I need a shorter focal length? I don't want to crop because my two friends are in the lower left hand corner and I like it for perspective.
Why is the castle leaning on the right? Did I need a shorter focal length? I don't want to crop because my two friends are in the lower left hand corner and I like it for perspective.
Oct 21, 2012 23:40:52 #
It's called "keystoning"-like the key-stone in an archway.
Caused when you point a camera above horizontal.
Wider angle lenses demonstrate this effect more readily than longer ones because the camera is usually closer to the subject and tilted more. Stepping back, if you could, would help decrease the effect.
You can correct for some of this in post-processing programs.
http://www.lonestardigital.com/perspective_correction.htm
There are tilt-shift lenses made to correct for this as well.
They are not something most people would have.
To fix this in the camera with one of these lenses, you would shift the lens up while keeping the focal plane vertical, parallel to the building.
Large format view cameras have shifts, swings and tilts to correct a lot of problems. They are made with a bellows between the lens and back standards to allow for a wider range of movement.
Caused when you point a camera above horizontal.
Wider angle lenses demonstrate this effect more readily than longer ones because the camera is usually closer to the subject and tilted more. Stepping back, if you could, would help decrease the effect.
You can correct for some of this in post-processing programs.
http://www.lonestardigital.com/perspective_correction.htm
There are tilt-shift lenses made to correct for this as well.
They are not something most people would have.
To fix this in the camera with one of these lenses, you would shift the lens up while keeping the focal plane vertical, parallel to the building.
Large format view cameras have shifts, swings and tilts to correct a lot of problems. They are made with a bellows between the lens and back standards to allow for a wider range of movement.
Oct 22, 2012 06:51:21 #
Michael O'
Loc: Midwest right now
GoofyNewfie wrote:
It's called "keystoning"-like the key-st... (show quote)
Plus rise and drop, as on the Linhof Technika 4 X 5; perfect for architectural photography.
And Canon has 3 Tilt-shift lenses for the 35mm bodies that sort of do the job -- they help but can't do what the 4X5 view cameras can.
Oct 22, 2012 07:40:51 #
This one isn't a simple fix in post processing. Usually you have a center of interest and if that is straightened, other things being tilted is acceptable. In this case you'll have to do lots of compromising since your visual focus tends to be near the left side of the image. I'll show you my best effort if you want.
Oct 22, 2012 11:51:28 #
It took me about 10 seconds to straighten the left side in cs5 edit-transform-skew other programs should have something comparable. I haven't figured out how to attach the pic yet
Oct 22, 2012 12:17:03 #
Once again, UHH rules require you to ask the originator before posting corrections to their picture
mookieandme wrote:
It took me about 10 seconds to straighten the left side in cs5 edit-transform-skew other programs should have something comparable. I haven't figured out how to attach the pic yet
Oct 22, 2012 14:57:35 #
The castle is not leaning--you are. And there is usual and normal perspective. Use you straightening tool (on Picasa).alyn
Oct 22, 2012 17:01:46 #
I detest having buildings with converging verticals (except for cases where this is done for artistic effect), so correct them in most cases. It is easy to take out this convergance in Photoshop Elements using the Correct Camera Distortion on the Filters menu. Use the Vertical Perspective slider and, if necessary, the rotate command.
Sometimes some of the top of the building disappears above the top of the picture, but in that case I merely increase the canvas size slightly before corrections.
Sometimes some of the top of the building disappears above the top of the picture, but in that case I merely increase the canvas size slightly before corrections.
Oct 22, 2012 17:12:28 #
[quote=mdeman]Once again, UHH rules require you to ask the originator before posting corrections to their picture
Maybe the forum should have a option for members to select the option to let members have a go at photos and if they don't want to they just select no. Make sense? Most other forums have that option. Just faster than waiting for a reply from the OP.
Maybe the forum should have a option for members to select the option to let members have a go at photos and if they don't want to they just select no. Make sense? Most other forums have that option. Just faster than waiting for a reply from the OP.
Oct 22, 2012 19:16:47 #
pinkycat wrote:
I shot this with a T3, 24-105L lens, ISO 100, F 4.50, 24 focal length, Shutter speed 1/50.
Why is the castle leaning on the right? Did I need a shorter focal length? I don't want to crop because my two friends are in the lower left hand corner and I like it for perspective.
Why is the castle leaning on the right? Did I need a shorter focal length? I don't want to crop because my two friends are in the lower left hand corner and I like it for perspective.
A "shorter focal length" would create more keystoning--but you are already at the widest angle (24mm) of this lens-- so I'm confused about what you meant.
Oct 22, 2012 20:05:43 #
Michael O' wrote:
Plus rise and drop, as on the Linhof Technika 4 X 5; perfect for architectural photography.
Plus rise and drop, as on the Linhof Technika 4 X 5; perfect for architectural photography.
Thanks for the reminder- I haven't shot large format in years. (Sinar F & P) I do miss some of it.
Oct 22, 2012 20:08:35 #
Oct 22, 2012 20:10:09 #
[quote=QueenChatty]
There is such an option. It is chosen by the originator. It is chosen by checking the store original box next to the file name. In this case I intentionally didn't choose it.
I appreciate your willingness to help. Being new here, I'm sure you didn't know. Thanks again.
mdeman wrote:
Once again, UHH rules require you to ask the originator before posting corrections to their picture
Maybe the forum should have a option for members to select the option to let members have a go at photos and if they don't want to they just select no. Make sense? Most other forums have that option. Just faster than waiting for a reply from the OP.
Maybe the forum should have a option for members to select the option to let members have a go at photos and if they don't want to they just select no. Make sense? Most other forums have that option. Just faster than waiting for a reply from the OP.
There is such an option. It is chosen by the originator. It is chosen by checking the store original box next to the file name. In this case I intentionally didn't choose it.
I appreciate your willingness to help. Being new here, I'm sure you didn't know. Thanks again.
Oct 22, 2012 20:41:20 #
Oh sorry...thanks for letting me know of the option. On another forum in user settings they have a specific box that you check mark if you want to enable photo edits by other users. I have never heard of store original. When I read the description for store original it did not occur to me to be the same as having edit capabilities. Now I know.
Oct 22, 2012 23:28:02 #
There are two ways to prevent this and one way to correct it. You can correct it using editing programs, most have a 'correct for lens distortion' feature. You can prevent it by using a large format camera or a tilt-shift lens, or you can shoot it with your camera perfectly level and then crop out all of the unwanted foreground. If you are going to correct in software make sure you are far enough back from your subject that you will still have the composition you want after distortion correction and cropping.
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