Tuesday, January 4, 2011

Wide angle lenses for UV?

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Here today a wide angle test I made with some wide angles I had around (all Nikon mount except the Lithagon) 1) Nikkor E 2.8/28mm 2) Nikkor-...
Sunday, January 2, 2011

Phalaenopsis stereo in ultraviolet and butterfly vision

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Today the first post of year 2011 will be about shooting stereo images (for crossed eye viewing) of a Phalaenopsis hybride orchid flower in ...
Thursday, December 30, 2010

Easy way to test for focus shift

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Well, sometimes it would be interesting to know if there is focus shift for a certain lens. I usually take parts of my calipher and shoot it...
Sunday, December 12, 2010

BBC Science Interview on Bees and their UV Vision

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Interesting interview of BBC Sciene & Environment on bees and their ability to see UV. The cover photo has been done by me for a previou...
Thursday, December 9, 2010

Ultraslim helicoid allows infinity focus

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This is about an ultra-slim, deeply recessed helicoid, which solves the problem of allowing further away focus with some lenses (mostly enla...
Tuesday, December 7, 2010

[UV, FL] Roman Artifacts paint / glaze visibility

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A study conducted for a friend using some excavated roman artifacts. The idea was to see, if deteriorated paint/lead glacing could be made v...
Monday, December 6, 2010

[UV] A surprising lens without UV focus shift II

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Here a few more tests using Sanvitalia procumbens as a target and these surprising lenses showing no / hardly any focus shift for reflected ...