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EXCERPT page containing first few paragraphs. 2019-05-24 09:02:18

Zeiss ZF.2 21mm f/2.8 Distagon T*

Aperture Series: Eroding Ancient Bristlecone Pine (Nikon D800E)

This apertures series from the 21mm f/2.8 Distagon show performance on a deeply 3D scene: a very close foreground and a background whose detail is desirable.

Eroding ancient bristlecone pine

Due to the dry high altitude conditions and dense tight-grained resinous wood, the ancient bristlecone pines in this area do not rot; they erode away, over centuries.

A polarizer was used to bring down the brightness of the sky, which has made the sky quite dark: maybe not such a great idea. However, for black and white conversion utilizing the blue channel, this appears to be a very useful idea.

The f/2.8 exposure was given 1/3 stop more exposure than f/4 to ease comparison (thus f/2.8 is actually 1/3 stop darker than shown here). This matches the center brightness closely, though the f/2.8 image is darker away from center.

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