prime lens for architecture pics

jonny250 (e2 Member)

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5 Jul 2011 - 3:04 PM

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I'm looking at getting a Canon 5D2 to use in a new business venture using photogrammetry; I am looking for a good sharp wide lens to go with it, and am thinking of the Sigma 28mm f1.8 EX DG or the Canon EF20mm f2.8 USM. Has anyone used either of these to offer their opinion? I also wonder whether the 20mm will have significant distortion - i can rectify the photo in the photogrammetry software but its better to start without too much distortion.
My main use for the lens will be photographing buildings exteriors to make 3D cad models.
I'm based in Guernsey and the local shops dont hold these lenses, so difficult to see before i buy.
Thanks

ianrobinson (e2 Member)

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5 Jul 2011 - 3:34 PM

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like Keithh said, a canon 24mm tilt shift is the choice for serious architectural photography, although you can use wide angle lenses but the problems with wide angle should be obvious in the respect of lens distortion, this can be cured in photo shop however, tilt shift has another advantage over wide angle lenses to, tilt shift lenses are pin sharp from front to back where as wide angle lenses tend not to be as sharp.

Usual story i am afraid, you pays your money you gets your quality, something that has been lacking in this country for many years.

ade_mcfade (Critique Team)

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5 Jul 2011 - 4:50 PM

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There's a canon 17mm TS-E as well

I've tried the old 24mm and wasn't really blown away, but had a quick play with the new version in a camera shop and it does seem a more impressive beast.

Tiz on my shopping list - the 17mm that is.

You can use a 17-40 and pit the centre spot somewhere near pavement level to avoid distortion to an extent, but you do lose 1/2 the shot to road and pavement...... or you could make a style out of it

Andy_Cundell (e2 Member)

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5 Jul 2011 - 4:54 PM

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Just buy a tilt and shift lens anyway and 'miniaturise' everything!