Tilt it, baby!

Saturday, 3 January 2009

Maynooth Castle, Ireland, 2008reflection

Nor­mally there are always cars parked in front of the old Maynooth Castle ruins, but on St. Steven’s Day (Dec 25th) the town was as empty as I’ve ever seen it, and no cars spoiled a shot that I wanted to take since a long time. Apart from mess­ing with the col­ours, there are two inter­est­ing things about this photo.

On the one hand it was taken with my new cam­era (finally I’m also in pos­ses­sion of a full frame cam­era, that is a cam­era whose sensor is the size of a 35mm film neg­at­ive) and as well as my new wide-​angle lens.

On the other, I used the lens dis­tor­tion tool in Pho­toshop to cor­rect the per­spect­ive dis­tor­tion that comes with shoot­ing at an angle. By per­spect­ive dis­tor­tion I mean the effect where ver­tical lines (that ought to be par­al­lel) con­verge toward the van­ish­ing point, and build­ings appear to be fall­ing back­wards, if left uncor­rec­ted. There’s basic­ally three things you can do to avoid this effect. (1) Buy a (tilt/)shift-lens, (2) shoot hori­zont­ally at a wide enough angle to cap­ture what you want to cap­ture, but crop after­wards, like so or (3) cor­rect for the per­spect­ive after­wards in post-​processing, e.g. with the Lens Cor­rec­tion Tool in Pho­toshop. The best tech­nique would be (1) to use the spe­cial­ised lens as it allows you to use the full res­ol­u­tion of your sensor, but those are expens­ive and not avail­able for all cam­era sys­tems (e.g. mine). As for (2), you throw away res­ol­u­tion after­wards as you’ll be crop­ping large parts of the image, and you have to think of this tech­nique on the spot already, while you’re tak­ing the photo. The last method is kind of in between, you don’t loose too much inform­a­tion, but it is a destruct­ive trans­form­a­tion to your images (at least for the time being, fin­gers crossed it’ll be included in Light­Room soon).

In this present photo I chose tech­nique (3) as I don’t have a tilt/​shift-​lens, and 17mm was not wide enough to do trick (2). Any­way, I hope you’ve now learned a little bit about how you can avoid per­spect­ive dis­tor­tion, provided you have the right gear /​soft­ware at hand.

Focal length: 17 mm
Aperture:ƒ/9.0
Exposure:1/50 s
ISO:200
Lens:Minolta 17-35
Location: Maynooth, Ireland
Posted at 13:47

Flying on the Bamboo Train

Thursday, 1 January 2009

On a Bamboo Train, near Battambang, Cambodia, 2008reflection

Happy New Year every­one, sorry this new post took so long. This one was taken on the famed “Bam­boo Train”. It’s a Cam­bod­ian inven­tion (one of the kids told me proudly) and con­sists basic­ally of three parts: A motor, a very light bam­boo flat bed, and a pair of axles. This mod­u­lar built allows it to be assembled and taken apart again in a mat­ter of seconds, even by a bunch of kids. Those trains used to run between the offi­cial train ser­vice on the national rail­way net­work, and there is only one simple (and obvi­ous) rule: The lighter train gets out of the way (off the tracks) first…

I love this pic­ture with those cool kids enjoy­ing the free­dom of speed­ing down the twis­ted rails while mak­ing a few bucks off ran­dom tour­ists that made it out there. Pho­to­graphy­wise it was shot with a polar­ising fil­ter for increased sat­ur­a­tion and col­ours, with an elev­ated shut­ter speed as it was shak­ing quite a bit. I chose a rather wide angle of view in order to cap­ture those con­ver­ging lines from the bam­boo plat­form as well, which kind of intens­i­fies the whole pic­ture.

PS: Here’s a short video over on You­Tube where at about 2:00 the guy talks about this crazy form of train.

Focal length: 16 mm (≈24 mm)
Aperture:ƒ/4.5
Exposure:1/250 s
ISO:200
Lens:Carl Zeiss 16-80
Location: Battambang, Cambodia
Posted at 17:58
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