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DPChallenge Forums >> Hardware and Software >> camera showing tilt ?
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03/17/2007 01:51:01 AM · #1
Hi Friends,
I have noticed too may tilted pics with my olympus E330 DSLR. I have been noticing that my landscape pictures were coming tilted and i was thinking it was a camera problem. I later realized that it could be barrel distortion.

Today i experimented and photographed straight lines using a commercial laser level indicator.
So i beamed a horizontal laser on a wall which was technically level and straight and shot pics at both end of zoom with my old and new cam using a tripod.

I found that my dslr showed more tilts than my old c740 but no pics had perfectly straight lines.
Can you guys look at the pics and tell me is this a natural problem or should i replace my equipment.
The pics are at
SLR at wide angle
' . substr('//amitkulkarni.info/dslr-e330-wide-angle-1.jpg', strrpos('//amitkulkarni.info/dslr-e330-wide-angle-1.jpg', '/') + 1) . '

SLR at Wide angle 2
' . substr('//amitkulkarni.info/e330_wide-angle.jpg', strrpos('//amitkulkarni.info/e330_wide-angle.jpg', '/') + 1) . '

DSLR at tele
' . substr('//amitkulkarni.info/dslr-e330-tele.jpg', strrpos('//amitkulkarni.info/dslr-e330-tele.jpg', '/') + 1) . '

old c 740 at zoom
' . substr('//amitkulkarni.info/old-c740-zoom.jpg', strrpos('//amitkulkarni.info/old-c740-zoom.jpg', '/') + 1) . '

old c 740 at wide angle
' . substr('//amitkulkarni.info/old-c740-wide-angle.jpg', strrpos('//amitkulkarni.info/old-c740-wide-angle.jpg', '/') + 1) . '

BTW also as a second opinion i checked web on flickr for some best images from E330 and these shots i found which also display tilt according to me.
//www.flickr.com/photos/atrium09/414664833/in/photostream/
//www.flickr.com/photos/atrium09/306829348/
//www.flickr.com/photos/atrium09/342473123/
//www.flickr.com/photos/atrium09/337379183/

Do you think the same or am i in "tilt mania' mode


03/17/2007 01:56:13 AM · #2
This is pretty much normal on wide angle, try taking a close up of a person with a couch behind them. You will see the angle very pronounced. I always try to zoom in to avoid the horrible leans on buildings, with landscapes it is not so noticeable
03/17/2007 02:28:22 AM · #3
You really need to have your camera straight and level to do this test. Your sensor needs to be perfectly parallel to the wall surface, which it isn't in several of these photos.
03/17/2007 06:14:45 AM · #4
Are you sure the wall is totally flat? As jmsetzler says it doesn't seem that the camera is perfectly level, normal to the wall and level with the line which would need to be the case if you want to prove anything.

But yes, most lenses have a small amount of distortion, particularly wide angles. If it bothers you that much dxo optics can correct it if it supports your camera and lens...

splidge
03/17/2007 12:45:56 PM · #5
With a wide angle, you get lots of issues if your camera is not exactly level and exactly pointed at the wall.

If you tilt up and down, you get "keystoneing" problems. If you tilt it sideways, you get a kind of trapezoidal distortion (sort of a sideways keystone).

The only way I've figured out to do it exactly is to use a hot shoe bubble level, and make sure your camera is at a right angle to the wall.
03/17/2007 07:18:29 PM · #6
Thanks a lot for ur inputs

The camera was mounted on a tripod and it has a bubble indicator which was also at the center ..... Yet today ill ensure the plane of the sensor is in parallel with the wall

Another thing is did you guys have a look at the flickr images ... did u notice the tilts there ??
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