Photo of the day: “escalier au ciel”

30 04 2012

No photoshop, honest! I did tap down the exposure two f-stops by metering on the bottom of the stairs and then shifting up before releasing the shutter. This is one of those times where digital photography loses the magic of the delay, the wondering, did I get the exposure right?

These stairs may be familiar to tourists to Paris… yes they are the first flight of stairs to go up the Eiffel Tower 😉

 





Photo of the Day

29 04 2012

Here is a picture of the river valley that makes the northern border of Portugal, taken from a promontory near La Guardia in Spain. The lighting was more luck than design, it was just a helluva day! Click the image for a larger version.

2008-10-08 - J Hart - La Guardia Spain

La Guardia, Spain-Portugal Border, 2008, by Jarrod Hart





Tilt shift miniaturisation, giving away the family jewels…

28 04 2012

After seeing this impressive video by Robert Weber about a town near where I used to to live, I decided to give tilt-shift photography a try…

I never tire of that video, and the music grew on me too.

Anyway, so here is the straight dope on tilt-shift…

What you’re supposed to do is take a picture with the lens tilted along a horizontal axis relative to the photographic plate (or CCD for newfangled cameras). This means only a strip across the middle is in focus, and the picture gets gradually more blurry towards the top and bottom.

Now this sounds wasteful of good focus, but is actually something the eye is very used to seeing whenever it looks as a horizontal plane, such as a table-top (one that’s pretty close). Of course, for bigger things, like a football fields, you can usually focus on entirely, especially if you’re seated where the tickets are cheaper. Anyone who has tried to take a photo of small things, or used a microscope, knows this.

So basically, the brain associates this blurring with ‘close’ things, and uses it as one of its tools to guesstimate the size of things.

So you (yes you!) can fool the brain into making things look smaller by adding blur to your photos!

Aside for my science readers…

You can actually create true focal depth blur by using a very wide aperture in your camera; however, even the widest apertures struggle to create much miniaturisation – to get true blur at significant distance, you really need to scale-up the camera proportionally with the distance. To make a warehouse look like a microchip, you really need a camera big enough that its microships are the size of warehouses 🙂

Now, when I was researching this, I was probably thinking what you’re thinking. Mile-wide camera’s are probably a custom job, and even cameras where the lens can be tilted never fail to confuse the nice people at Wal-Mart.

Needless to say, Photoshop (other brands are available!) can add the blur.

Before we dive in, another other top-tip is that air tends to add blue and wash out your colour saturation; you can remove the faraway mountain look by bigging up the red and green saturation. So here was an early attempt of mine:

Here I took a fairly plain photo, added progressive more blur toward the top and bottom, but taking care to mask the tree on the right from the blur. I also greened it up a bit 😉 – I like how it makes the destiny of the golf ball sort of mysterious. Like most of my golf balls.

Of course, touch-ups like the tree are tedious, you really need a photo that has the faraway stuff at the top and the things at the bottom to avoid such issues. Or you can just ignore them and it usually works out fine:

So I blurred the treetop. Most viewers (test subjects in my experiment) did not notice this until I explained what I had done.

Here is one last example; the photo just asked for it…

Enjoy trying it out, and please do add links to your own work – though not to ones you find by googling “tilt-shift photography”, I already did that, and heartily recommend it 😉





Tilt-Shift Truro

28 04 2012

I just had a slap fore-head moment when I realised that a blog is better way to share the pleasure of a nice photo than facebook. So here’s one I’m pretty chuffed with!

Truro, Cornwall, from above





Can you guess what it is?

28 04 2012

No cheating 😉

guess, dammit

Can you tell what it is? Its something you see often and comes in lots of nice colours 😉

 

Credit goes to this website (obviously contains a spoiler!): http://www.sciencephoto.com/media/308891/enlarge