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Sony NEX-5N (monochrome) for UV/IR

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#61 dabateman

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Posted 17 January 2021 - 14:41

I hope you get better soon Birna.
Even these monochrome images are interesting.

#62 Stefano

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Posted 17 January 2021 - 16:14

Very interesting. There is indeed quite a difference in the wooden wall.

#63 Andy Perrin

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Posted 17 January 2021 - 16:53

Yes, the horizontal lines of moisture are much more visible in the UV (now that I know what to look for). Feel better soon, Birna.

#64 Andrea B.

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Posted 21 January 2021 - 00:47

This is like one of those kid puzzles where you are supposed to find the small differences between the two nearly identical pictures. I see the basketball backboard and the window frames. :grin:
Andrea G. Blum
Often found hanging out with flowers & bees.

#65 nfoto

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Posted 21 January 2021 - 06:10

"Find Willy" -- my kids loved those large pictures.

UV tonality can be very similar to visible in black-and-white, yet there are always clues present even when the (fake) colours are absent. In the spring or summer, differences would be more obvious. In this wintery scene, one has to be surprised there is any UV left to make a decent exposure!! (remember: hand-held camera).

#66 nfoto

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Posted 12 February 2021 - 17:10

From today's experiments: experimenting with various old lenses and the Baader U on the NEX-5N. I was surprised by the UV output of my pendulum lamp ... it has 5 halogen LED lamps and 4 of them registered brightly in UV. The glowing spot in the lower left is my NEMO torch reflecting off stainless steel.

Attached Image: S202102110971.jpg

A shutter speed around 1/6 to 1/13 sec at ISO 800 with the old lens, here the W-Nikkor 3,5cm f/2.5 from mid '50s, set to f/5.6 was surprising.

#67 dabateman

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Posted 12 February 2021 - 17:50

Yes my newest halogen bulbs dip to 350nm. My older ones are blocked at 400nm.
I quickly bought up a bunch of them pre COVID as they are great lights for IR and a full spectrum with the 1000 lines/mm film. I used that before I got a really spectrometer.