G5 - Lense Distortion .

[Action_Man]

There`s no real point in complaining about it because it isent going to get better but here is a shot i did today which shows how bad it is :) ...

Large Image here (http://action.tgbf.org/Astley-Hall.jpg)

[Action_Man]

This image may be a better example :) ...

83727

One solution would be to buy a fish-eye lense and put it on backwards ? ...

[Andy_T]

Hi Action_Man,

part of the 'distortion' you see in your second image is the result of a well known photographic problem known as 'converging lines' or 'keystoning' that is to be expected if you use a wide angle lens and tilt it upwards at a close distance.

Other than your mentioned solution of putting on a fish-eye lens, you might try to
- use a longer focal length (do not fully zoom out) and more distance from your subject
- use a higher shooting position
- try to correct it in programs like Photoshop (http://megaweb.clubsnap.org/articles/pstips/ps6_perspective.html), PanoTools (http://www.panotools.info/) or PTLens (http://epaperpress.com/ptlens/).

http://www.microsoft.com/uk/homepc/digitalimage/more/ImageRescue.mspx

Hope that helps :wink:

Best regards,
Andy

[Action_Man]

Thanks for the tips Andy - now i`m aware of it i know what not to do in future, i usually take 99% macro`s anyway so its no big deal to me ...

[Action_Man]

And i was joking about the fish-eye lense btw :D ...

[Terrywoodenpic]

I have taken the liberty of putting your pick through PTLens and Sorting the converging verticles in photoshop.
I used settings in PTLens for full wide on a G5... There was very little lens distortion.
However There was a great deal of converging verticals, which I sorted in photoshop using Distort, as you had both pointed the camera up and twisted it a bit to get the building in.

These corrections are normal and not the fault of the lens , but are caused by point of view and camera angle. all Photographs since its invention have shown thes realities, and ever since then photographers have found ways to make visual corrections.

http://i21.photobucket.com/albums/b279/terrywoodenpic/ah2.jpg

[Action_Man]

Thanks for the reply Terry, i will use the PTlens in future if needed.

Here is another example - look at the telegraph pole on the left and see how it and the builings bend inwards ...

83761

[Terrywoodenpic]

Thanks for the reply Terry, i will use the PTlens in future if needed.

Here is another example - look at the telegraph pole on the left and see how it and the builings bend inwards ...

83761

This is caused by the camera pointing up a little, not the lens.
would be very easily corrected in photoshop.

[andrewaaa5]

Action man, in your shot of the manor house, i pressume you were standing quite close and with the camera on a wider angle. One method to reduce these distortions is to stand a lot further back, and 'zoom' in to capture the house. Working for a greater distance with zooming in helps with these distortions slightly.. Otherwise this lens is functioning as it should be, and in my opinion if a quite nice lens