Solar spectrum lens test - Industar-61LD 53mm f2.8

[Dmitry]

LENS: Industar-61LD 53mm f/2.8.

This lens contains some elements made from lanthanum glass.

More details in the index topic.

Camera: Olympus E-PM1 full spectrum converted myself.

 

Full spectrum, no filter

 

ZWB1 (2mm)

 

ZWB2 (2mm)

 

ZWB3 (2mm)

 

ZWB3+QB21 (4mm)

[Andrea B.]

Dmitry, I am simply curious about how the spectrum would look using a qb21 only. If you can make me just one example, I thank you.

[Dmitry]

This from another lens. qb21 spectrum

[Dmitry]

I'm going to convert this lens to something more useful. Rear element is cemented and it glowing under 365nm LED light.

[OlDoinyo]

It would be helpful if you could put numbers to the horizontal positions on your scale. Could you calibrate with a line spectrum such as Hg or Na?

[Dmitry]

I did it in other topic - http://www.ultravioletphotography.com/content/index.php/topic/2803-solar-spectrum-lens-test-olympus-mzuiko-digital-25mm-f18/page__view__findpost__p__21723

[OlDoinyo]

If I interpret the lines in your spectra correctly, only the far left end of the frame is of interest to UV photography (other than judging IR suppression.) It appears that these spectra show little at wavelengths shorter than about 370 nm. Perhaps this is a property of your lens, or perhaps it is due to some other limitation of your set-up.

[Dmitry]

Another lens shows a line of 358nm, so current set-up is not a factor for this lens.