Author Topic: [Theme] Pictorial UV  (Read 37408 times)

charlie

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Re: Pictorial UV
« Reply #30 on: February 09, 2016, 20:11:29 »
Bjørn, thanks for your contributions. Many of these photos you've posted are what originally got me interested in UV, it is nice to see them again. It has been a long time since I've used my broadband D70, I've thought about converting my seldom used D200 as it is a bit more user friendly than the D70. What camera(s) are you using for UV shooting these days?


UV at the beach.

Frank Fremerey

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Re: Pictorial UV
« Reply #31 on: February 09, 2016, 20:26:35 »
Back to the topic of pictorial use of UV.

How do animals look like in UV?
You are out there. You and your camera. You can shoot or not shoot as you please. Discover the world, Your world. Show it to us. Or we might never see it.

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Bjørn Rørslett

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Re: Pictorial UV
« Reply #32 on: February 09, 2016, 20:29:22 »
Charlie: the nitty-gritty UV field work usually is conducted with a Nikon D3200 (built-in Baader U2" Venus filter), while I employ a D600 broad-spectrum for studio work. For UV video, a Panasonic GH-2 (broad-spectrum). I have sold off the D200 cameras with various built-in UV-transmitting filters, though.

Bjørn Rørslett

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Re: Pictorial UV
« Reply #33 on: February 09, 2016, 20:31:12 »
How do animals look like in UV?

Variable. Sometimes they exhibit pronounced UV patterns sometimes not.

Bjørn Rørslett

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Re: Pictorial UV
« Reply #34 on: February 09, 2016, 21:23:53 »
Mixed Reeds & UV


Bjørn Rørslett

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Re: Pictorial UV
« Reply #35 on: February 09, 2016, 23:15:56 »
Making a Clean Slate :D

charlie

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Re: Pictorial UV
« Reply #36 on: February 10, 2016, 18:33:13 »
Sunflower

Bjørn Rørslett

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Re: Pictorial UV
« Reply #37 on: February 10, 2016, 18:47:22 »
Dandelion meadows are a constant feature of the Western districts of Norway in early May.


Thomas G

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Re: Pictorial UV
« Reply #38 on: February 10, 2016, 21:29:04 »
Bjørn, thanks for your contributions. Many of these photos you've posted are what originally got me interested in UV, it is nice to see them again. It has been a long time since I've used my broadband D70, I've thought about converting my seldom used D200 as it is a bit more user friendly than the D70. What camera(s) are you using for UV shooting these days?

UV at the beach.
Very nice tones and silouettes. I come revisiting it.
-/-/-

Bjørn Rørslett

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Re: Pictorial UV
« Reply #39 on: February 10, 2016, 21:54:54 »
My first really successful UV image in the sense that I managed the technical challenges and was able to achieve what I had set out to accomplish. Seen in hindsight something absolutely hopeless as far as UV goes, because I didn't realise as a novice in the field what should have been obvious, namely, I could not achieve the tonality of my selected scene the way I requested it to be. The sky should have been rendered bright not dark as I envisioned.

This learning exercise took place at the lake nearby, so I used a period of nice sunny summer days to nip over to my selected motif and photographed it every day at the same time, whilst keeping copious notes of the settings and exposure data. Remember this was film, no EXIF ... Then dropped the film at my lab and picked it up later, so I could adjust the details for next days' tribulations thus slowly iterating towards the level of command we now take for granted of UV photography.

This day, everything was perfect, some wind to buffet the lake surface, some clouds to give intermittent sun rays, and I felt confident all systems were good to go. Then, I detected I only had a few frames left on my last roll of Fuji RTP film, and to make the situation even worse, the sun broke out of clouds and threatened to blow out the sky. In desperation I pulled a 100 Kroner bill from my wallet and used it as a makeshift graded ND filter. During 30-40 sec exposures you have the opportunity to influence the outcome :D



Well, I ended up with this picture that was pure UV, but not in the technical correct sense of UV. Did I care? Not at the time, and not now either. It was formative for my perception of what nature photography entails.

Akira

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Re: Pictorial UV
« Reply #40 on: February 11, 2016, 03:12:09 »
This is my humble example of UV capture of crucifer(s) on 120 size Fuji RTP II.  The lens was LPL 75mm/f4.5 enlarger or EL-Nikkor 63mm/f3.5.  The filter is Hoya/Kenko U-360.  The lighting was a UV modified Sunpak 360 flash.  No IR-blocking measure was needed.  :)

The image is a crude reproduction of the film on a light table, hence the yellow flare.
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Jørgen Ramskov

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Re: Pictorial UV
« Reply #41 on: February 13, 2016, 08:33:43 »
Wonderful images. I've seen several of Bjørns before, but I enjoy seeing them again.
Jørgen Ramskov

Bjørn Rørslett

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Re: Pictorial UV
« Reply #42 on: February 14, 2016, 17:44:08 »
Akira: I sincerely hope you have more of those RTP 120 experiments to show :D

As I have hinted at in earlier posts is the fact that UV photography battled with traces of IR contamination. This is simply due to the fact that most UV bandpass filters have a small, even minuscule, "sideband" in the near IR. Add to this the exacerbation caused by IR being at least 20X more plentiful than UV and the digital sensor itself is much more sensitive to IR than UV, and it is easy to understand that even the tiny leakage in IR could wreak havoc with the UV imaging done with the first generation of digital cameras and the UV bandpass filters of the time.

In the mid 'naughties better UV bandpass filters with improved rejection of IR started to appear. Their superior attenuation of IR did result in a different colour palette than what we obtained before, though. Were these 'new' false UV colours any truer? Yes, in the sense that low UV reflectivity now appeared as very dark to almost jet black areas of the image, for which earlier filter gave nice reddish hues (due to leakage of some visible and even more importantly, near IR rays). No, in the sense that the earlier palette of UV false colours was easier to perceive as nice and pleasing.

Anyway, even with the new stock of filters, you could obtain pictorial UV images. The one below has been a favourite for many years and often used as wallpaper on my various work stations. Taken with the UV-Nikkor on my front porch, by the way, at the time when the cherry trees shed their short-lived petals.

Jakov Minić

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Re: Pictorial UV
« Reply #43 on: February 14, 2016, 17:48:44 »
Bjørn, jaw dropping! All of them!
Free your mind and your ass will follow. - George Clinton
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charlie

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Re: Pictorial UV
« Reply #44 on: February 14, 2016, 18:00:14 »
It is nice to see UV captures on film, is it still possible or did they discontinue all of the films that were sensitive to UV?

Nice use of a 100 Kroner bill, Bjørn.