[UV] Guess which is the quartz lens...!?

[kds315]

This is a test shot to compare a Fluorite/Quartz lens with a "normal" lens for UV photography. The shots show one each per row. All done at f8 and using the new UG11xx Baader filter for the UV shots. The images are cropped/sized for about the same size for comparison. Focus was NOT completely identical.

And your guess is? Would you consider both lenses for shooting UV or just one of them??

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[Nikon D70 + Baader UG11xx + lens. UV shot about -10EV compared to VIS shot, identical postprocessing and resize for same appearance due to different focal length]

 

[kds315]

and a second example:

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[greyflash]

Normal - Quartz. Of course I have no knowledge of UV photography but thought it would be fun to guess. Lovely images.

 

[kds315]

Thanks Gordon!

Would you be so kind, if you have the time, and evaluate both lenses from your personal viewpoint a bit more detailled - I would like a second opinion...
Here and here are high resolution images.

Thanks, Klaus

 

[Chris101]

The lower images are in much better focus. I will guess that is a result of a better spectral window provided by the quartz lens.

 

[charliec]

my guess is the upper set is the quartz. they seem to have more contrast and more detail than the lower set. I assume post processing was the same on the upper and lower pictures.

however there seems to be more of a focus shift on the upper set which would make me think that is the normal lens.

tough call.

i would definetly use both for UV shooting.

 

[JoeG]

My guess is, that the upper photos are shot with the quarz lens. It looks sharper and has more contrast.

is the post processing on both the same?

difficult...

 

[kds315]

Just added tech. notes, same postprocessing done, cropped/resized due to different focal lengths.

 

[kds315]

More examples shot with the "normal" lens, here the "classic target":

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Details (100% crop):

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[kds315]

... and more:

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Details (100% crop, 90 degree rotation):

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[kds315]

... some Myosotis finally:

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[kds315]

Btw. the first row was shot using the fluorite/quartz lens (Coastal Optics), congrats to the ones who got this right!