Tuesday, February 7, 2012

[UV] BBC Green Planet Series - The Science of Plants - How to Grow a Planet (II)

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I had previously announced here my contribution to the BBC2 new three episode series "How to Grow a Planet" (renamed from "...
Friday, February 3, 2012

[UV, VIS, IR] Lyman Alpha deep UV lenses

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Well, an old collectors rule is "everything comes to him who can wait" - that it would be 16 years from when I first learned about...
Monday, January 30, 2012

[UV] Lichen in reflected ultraviolet light III

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Today more about Lichen shots in visible and ultraviolet light, especially how damaged or dead lichen look like. [click on image to see a la...

[UV] Lichen in reflected ultraviolet light II

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Today more about Lichen shots in visible and ultraviolet light. [click on image to see a larger one] These UV images here also uses my stand...
Saturday, January 28, 2012

[UV] Transmittance of the Minolta TC f4 135mm Triplet Lens

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I tested some bellows lens heads the other day and the (expected) surprise was, how well that older and overlooked Minolta TC f4/135mm bell...

[UV] Transmittance of some Bellows Lens Heads

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I conducted a test today to measure the UV transmittance of some older manual bellows lens heads I have here. Be reminded that this is only ...
Wednesday, January 25, 2012

[UV] Lichen in reflected ultraviolet light

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Today about Lichen shots in visible and ultraviolet light. [click on image to see a larger one] These UV images here also uses my standardiz...