March 27, 2012

I just had to show the Vega-12b lens and try the iPhone blog app. Quite small for being a medium format lens. I'm glad that I got it for free due to the sticky aperture, which I have mended to a usable, but not perfect state. Although it is a very cheap lens on the used market. Being a medium format lens, it could be useful as a cheap way into DIY tilt-shift assemblies on APS-C and full format DSLRs.
Vega-12b

Photo nerd facts:
In a tilt shift assembly one can play with perspective corrections, by shifting the lens position by radial translation, and also putting the focal plane in any direction by angular rotation of the optical axle.

By shifting the lens, the perspective distortion is corrected to have straight vertical lines of the buildings.
Photo by smaedli available under a Creative Commons Attribution license

By tilting the lens, the focal plane is put vertically along the stone wall instead of the normal horizontal plane that is always had with a standard mounted lens.
Photo by madamarv00, available under a Creative Commons Attribution license

There is also a fake way of producing images that looks like shifted photos by applying gradual blur in different steps along with high color saturation and contrast. This is my first try I made several years ago, it is not perfect but at least gives some illusion of being a miniature world. Fake focal plane following the road diagonally across the image.
Fake tilt shift image of Gamla stan in Stockholm

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