Thursday, February 17, 2011

CERCO f4.1/94mm UV-VIS-NIR lens test

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Well, I recently bought that CERCO f4.1/94mm UV-VIS-NIR lens made by SODERN in France (type 2085). It is no longer available on stock (but ...
Friday, February 11, 2011

Filter glass requirements for camera modification

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Modification of a camera dedicated to IR or UV needs the replacement of the internal cut filter in front of the camera sensor by a suitable ...
Wednesday, February 9, 2011

New shutter control unit seems to spoil UV + IR images for modified cameras

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Bad news for us UV or IR shooters: It seems that Nikon has introduced for their newest DSLRs (D3, D3x, D3s, D700, D7000) an intelligent ...
Tuesday, February 1, 2011

Psychedelic Lilly - a surprising lens find for UV and VIS w/o focus shift

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Well, while I was doing these "Psychedelic Lilly" test shots here and here with quite a few lenses (the winners being the Noflex...
Sunday, January 30, 2011

Psychedelic Lilly - a UV and VIS comparison Noflexar 35mm vs EL-Nikkor 80mm

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A really nice flower, a "Stargazer Lilly", so let's see how the beauty of that flower will look like through the well known No...
Saturday, January 29, 2011

[UV] Lenses tested good for UV

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This is simply a collection of links to tests I have done for various lenses in terms of UV transmission and UV focus shift. Some also conta...

How to determine the length of a focusing helicoid

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I have been asked, if there is a way to simply determine the needed length of a focusing helicoid to reach infinity focus [when mounting for...