visualopsins
Joined: 05 Mar 2009
Posts: 10978
Location: California
Expire: 2025-04-11
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 Posted: Fri Jan 26, 2024 1:13 am Post subject: |
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visualopsins wrote:
Have you seen:
2011 documentary "Limits of Light -- Go Wild" directed by Alfred Vendl, Steve Nicholls.
UV-IR vision simulation of Insects, birds, even Mantis Shrimp(!) -- photos & videos.
https://youtu.be/jnGTCaiZqOE
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☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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kds315*
Joined: 12 Mar 2008
Posts: 16639
Location: Weinheim, Germany
Expire: 2021-03-09
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| Posted: Fri Jan 26, 2024 4:05 pm Post subject: Re: Multi spectral tools |
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kds315* wrote:
Yeah, seen it. Nothing new really except that they make all available to the public.#
Their theory seems to be correct, yet personally I have an issue mapping UV that bee can see into the red channel - they you look at a false color image, see a lot of RED and ask yourself in the back of your head "but bees cannot see RED..." - hence why my "simulated bee vision images" have hardly any RED in them (except what's need to create "white".
Well and they propose to use the nearly apochromatic old chrome/black EL-Nikkor 5.6/80mm (plus the 105mm + 135mm + 210mm) without mentioning / referencing the old who found those: me actually :LOL: And they also forgot that there are a newer serious of them with same names which are NOT APO nor do they transmit UV; the "rubber tyre" style EL-Nikkor ones...
Guess I send the main guy an email about that....
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Klaus - Admin
"S'il vient a point, me souviendra" [Thomas Bohier (1460-1523)]
http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
https://www.flickr.com/photos/kds315/albums my albums using various lenses
http://photographyoftheinvisibleworld.blogspot.com/ my UV BLOG
http://www.travelmeetsfood.com/blog Food + Travel BLOG
https://galeriafotografia.com Architecture + Drone photography
Currently most FAV lens(es):
X80QF f3.2/80mm
Hypergon f11/26mm
ELCAN UV f5.6/52mm
Zeiss UV-Planar f4/60mm
Zeiss UV-Planar f2/62mm
Lomo Уфар-12 f2.5/41mm
Lomo Зуфар-2 f4.0/350mm
Lomo ZIKAR-1A f1.2/100mm
Nikon UV Nikkor f4.5/105mm
Zeiss UV-Sonnar f4.3/105mm
CERCO UV-VIS-NIR f1.8/45mm
CERCO UV-VIS-NIR f4.1/94mm
CERCO UV-VIS-NIR f2.8/100mm
Steinheil Quarzobjektiv f1.8/50mm
Pentax Quartz Takumar f3.5/85mm
Carl Zeiss Jena UV-Objektiv f4/60mm
NYE OPTICAL Lyman-Alpha II f1.1/90mm
NYE OPTICAL Lyman-Alpha I f2.8/200mm
COASTAL OPTICS f4/60mm UV-VIS-IR Apo
COASTAL OPTICS f4.5/105mm UV-Micro-Apo
Pentax Ultra-Achromatic Takumar f4.5/85mm
Pentax Ultra-Achromatic Takumar f5.6/300mm
Rodenstock UV-Rodagon f5.6/60mm + 105mm + 150mm
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JMC
Joined: 29 May 2018
Posts: 178
Location: London, UK
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| Posted: Fri Jan 26, 2024 11:19 pm Post subject: |
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JMC wrote:
Must sit down and read this properly when I am back online, rather than looking at it on a phone. I got a notification about it the other day as they referenced a paper of mine regarding how to measure camera sensitivity (and it looks like their approach is similar to the approach I developed for my work) and Klaus also sent me the article. When I get home I'll take a proper look. And yes, I agree with Klaus about the lens - they are not specific enough about which ones actually transmit enough UV to be useful. As always, the devil is in the detail with regards to UV work...... |
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jamaeolus
Joined: 19 Mar 2014
Posts: 2965
Location: Eugene
Expire: 2015-08-20
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| Posted: Sat Jan 27, 2024 5:56 am Post subject: |
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jamaeolus wrote:
I saw a link to the paper in anarticle on the only other website on which I am an active participant, ars technika, a science and technology focused site. It is division of Conde Nast publishing. Pretty good site if you are interested in science, technology, cars, gaming and policy (mostly US policy but some international outlook when big tech butts up against foreign law).
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photos are moments frozen in time |
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