photoni Posted February 10, 2023 Share Posted February 10, 2023 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 Link to comment
Andy Perrin Posted February 11, 2023 Share Posted February 11, 2023 Last one is my favorite. Link to comment
colinbm Posted February 11, 2023 Share Posted February 11, 2023 Nice colourful bunch of flowers in any light. Link to comment
photoni Posted February 11, 2023 Author Share Posted February 11, 2023 thanks @Andy Perrin @colinbm today ... With 14.000°K fluorescent light and R72 . Nemo 365 nm + QB39 . Nemo 365 nm + red 25A . . Link to comment
Andy Perrin Posted February 11, 2023 Share Posted February 11, 2023 Interesting - do you think that lens has some haze or a hotspot maybe? Link to comment
Andrea B. Posted February 11, 2023 Share Posted February 11, 2023 I think perhaps just flare from the lighting? Link to comment
Andrea B. Posted February 11, 2023 Share Posted February 11, 2023 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. Link to comment
Nate Posted February 12, 2023 Share Posted February 12, 2023 Quite a bit of options you have with your filters, I do like the zwb1/2 and R72 combos you have best Link to comment
photoni Posted February 12, 2023 Author Share Posted February 12, 2023 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 Link to comment
Nate Posted February 12, 2023 Share Posted February 12, 2023 Make sense @photoni tbh all look great Link to comment
colinbm Posted February 12, 2023 Share Posted February 12, 2023 How do you know the 14,000°K neon light is that colour temperature ? Link to comment
photoni Posted February 12, 2023 Author Share Posted February 12, 2023 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 . Link to comment
colinbm Posted February 12, 2023 Share Posted February 12, 2023 OK, I haven't seen lights advertised as 14000K, so now I know. Oh, & by the way these are fluorescent, not neon. Link to comment
photoni Posted February 12, 2023 Author Share Posted February 12, 2023 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? . Link to comment
Stefano Posted February 13, 2023 Share Posted February 13, 2023 The green one is probably 546 nm, the red one probably comes from a phosphor as mercury does not emit strong red lines. Link to comment
Unscenerie Posted February 14, 2023 Share Posted February 14, 2023 Photoni, your spectral collages are interesting. Link to comment
photoni Posted April 10, 2023 Author Share Posted April 10, 2023 Happy Easter... belated with Sabattier effect . Link to comment
photoni Posted September 12, 2023 Author Share Posted September 12, 2023 other variants with @Kai system, shifted hue . . . Link to comment
Kai Posted September 12, 2023 Share Posted September 12, 2023 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? . Kalibration von Spektren – IAU Observatory C87 (astro-images.de) Link to comment
photoni Posted September 12, 2023 Author Share Posted September 12, 2023 Thanks so much @Kai you gave me "the Rosetta table" to decipher many of my tests. . Link to comment
Kai Posted September 12, 2023 Share Posted September 12, 2023 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: Link to comment
photoni Posted September 15, 2023 Author Share Posted September 15, 2023 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: . 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 . 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 . Maybe Birna @nfoto knows something ? . Thanks @Kai . Link to comment
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now