a bunch of flowers, tulips yellow / cream, hyacinths, buttercups, broom.

[photoni]

Sony A7 with Soligor KA 35mm, aperture 3.5 - 8
Fluorescent light 130W 220V 14.000°K
with a white balance to my taste.

 

VIS QB39 1,5mm (~ BG39)

 

 

QB5+TSN575

 

 

QB29 + QB39

 

 

ZB2 + TSN575

 

 

ZWB3 + TSN575

 

 

ZWB2 + TSN575

 

 

ZWB1 + TSN575

 

 

 

 

 

 

 

 

[Andy Perrin]

Last one is my favorite.

[colinbm]

Nice colourful bunch of flowers in any light.

[photoni]

thanks @Andy Perrin  @colinbm

 

today ... With 14.000°K fluorescent light  and R72

 

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Nemo 365 nm + QB39

 

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Nemo 365 nm + red 25A

 

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[Andy Perrin]

Interesting - do you think that lens has some haze or a hotspot maybe?

[Andrea B.]

I think perhaps just flare from the lighting?

[Andrea B.]

Toni, this section -- Other Botanicals -- requires formal botanical formatting. Do you want to do that? If not, then I can move the topic to the Filter Test section or to the general Ulteraviolet and Multispectral Photos section.

[Nate]

Quite a bit of options you have with your filters, I do like the zwb1/2 and R72 combos you have best

[photoni]

17 hours ago, Andrea B. said:

Toni, this section -- Other Botanicals -- requires formal botanical formatting. Do you want to do that? If not, then I can move the topic to the Filter Test section or to the general Ulteraviolet and Multispectral Photos section.

 

Andrea ... I wondered where to put this post, I like your idea. There could be a new section: poster! (beyond the visible)

 

@Nate   this strange coloration with R72 probably derives from the 14,000°K fluorescent light which has little IR

 

[Nate]

Make sense @photoni tbh all look great

[colinbm]

How do you know the 14,000°K neon light is that colour temperature ?

[photoni]

3 hours ago, colinbm said:

How do you know the 14,000°K neon light is that colour temperature ?

 

https://www.idroponica.it/compact-fluo-super-cool-14000k-envirogro~55031.html

is a light for plant cultivation boxes (you know what :-)

they say it's needed for the vegetation, for flowering you need a warm 2700°K light

 

I know the shop in Milan because I bought a 1.5x1.5x2m darkroom to load and develop 8x10 inch photographic film

(I don't grow plants and I shot it with the black part inside)

https://www.idroponica.it/mammoth-grow-box-tent-s-383.html

 

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[colinbm]

OK,  I haven't seen lights advertised as 14000K, so now I know.
Oh, & by the way these are fluorescent, not neon.

 

[photoni]

2 hours ago, colinbm said:

OK,  I haven't seen lights advertised as 14000K, so now I know.

Oh, & by the way these are fluorescent, not neon.

 

 

they are probably special to "mary"

 

@colinbm I'm sorry I used a wrong term, it's a fluorescent light (tri-phosphors) now prohibited because they contain mercury

I corrected the previous texts (neon > fluorescent)

 

 

Can you help me number the lines?
the first violet is 365 nm
the blue 400
What about the green and red ones?

 

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[Stefano]

The green one is probably 546 nm, the red one probably comes from a phosphor as mercury does not emit strong red lines.

[Unscenerie]

Photoni, your spectral collages are interesting.

[photoni]

Happy Easter... belated
with Sabattier effect

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[colinbm]

Happy Easter

[photoni]

other variants with  @Kai  system, shifted hue

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.

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[Kai]

On 2/12/2023 at 3:17 PM, photoni said:

 

they are probably special to "mary"

 

@colinbm I'm sorry I used a wrong term, it's a fluorescent light (tri-phosphors) now prohibited because they contain mercury

I corrected the previous texts (neon > fluorescent)

 

 

Can you help me number the lines?
the first violet is 365 nm
the blue 400
What about the green and red ones?

 

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Kalibration von Spektren – IAU Observatory C87 (astro-images.de)


 

[photoni]

Thanks so much @Kai  you gave me "the Rosetta table" to decipher many of my tests.

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[Kai]

3 hours ago, photoni said:

Thanks so much @Kai  you gave me "the Rosetta table" to decipher many of my tests.

.

 

The IR lines would be exciting. I do not have exact information about this. They also appear mainly when the lamps warm up and then become increasingly weaker.
In the following work someone recorded a series of spectra while the lamp was warming up.

https://www.astro-images.de/spektren-von-energiesparlampen/

You can see how the IR lines become weaker:

[photoni]

On 9/12/2023 at 11:50 PM, Kai said:

The IR lines would be exciting. I do not have exact information about this. They also appear mainly when the lamps warm up and then become increasingly weaker.
In the following work someone recorded a series of spectra while the lamp was warming up.

https://www.astro-images.de/spektren-von-energiesparlampen/

You can see how the IR lines become weaker:

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Yes, I had seen this article and the change in light output, from cold to warm.
Unfortunately there are no indications on the tracks outside the diagram.
on the left they say (CeTB:CeMgAIO = 349.536 nm)... it seems like the classic 365 nm reference to me!?
on the right after (Hg-2 = 809.31) there are no references!
with my Sony A7 f.s. I see other lines
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It would be interesting to have a graph of the emissions of high power Flash tubes, in the graph I put that of an old (1980) 1500 W Elinchrome quartz trasparent tube
I also have an Elichrom 4000W tube but with a light yellow anti-UV layer
I asked the Italian manufacturer for information but he gave me no information.
It would be interesting to have references to those brightness peaks in the 450 nm area and those in the 850>950 nm area

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Maybe Birna @nfoto knows something ?

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Thanks @Kai

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