jamaeolus
Joined: 19 Mar 2014 Posts: 2970 Location: Eugene
Expire: 2015-08-20
|
Posted: Sun Jun 21, 2020 6:46 pm Post subject: Hummingbird vision |
|
|
jamaeolus wrote:
In another forum I frequent they discussed an experiment identifying hummingbird vision. They have a sensor that detects UV. I put in a plug for Klaus' site. The site is a science and tech oriented site 'arstechnica.com' For science junkies like me it is the best. Most of the staff are PhD educated. They do a great job of translating technical papers to an educated lay audience and have the best comment section of any science site. Engineers, physicians, biologists, astrophysicists, etc. Really, experts in nearly every field weigh in on subjects.it's moderated and they do a pretty good job of limiting the dreck that infest most comment sections. Mfl is the only other site I visit nearly every day. _________________ photos are moments frozen in time |
|
visualopsins
Joined: 05 Mar 2009 Posts: 11044 Location: California
Expire: 2025-04-11
|
Posted: Sun Jun 21, 2020 8:34 pm Post subject: |
|
|
visualopsins wrote:
A litlte more wild site is https://slashdot.org/
EDIT:
The visual opsins are interesting...as are opsins in general, such as melanopsin which is sensitive to light cycles..melanopsin occurs all over and inside the body. Brains are thus sensitive to light passing through skull
The bird/bee vision photos continue with the spectral doubling effect, with violet showing blue and red components, assuming UV would have blue with extension into orange and yellow spectrum. My notion is the UV shuld be represented as greyscale according to wavelength, somehow layering that onto the visual only image, perhaps animated flashing greyscale UV layer on & off. _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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)
|
|
kds315*
Joined: 12 Mar 2008 Posts: 16658 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Mon Jun 22, 2020 8:43 am Post subject: Re: Hummingbird vision |
|
|
kds315* wrote:
jamaeolus wrote: |
In another forum I frequent they discussed an experiment identifying hummingbird vision. They have a sensor that detects UV. I put in a plug for Klaus' site. The site is a science and tech oriented site 'arstechnica.com' For science junkies like me it is the best. Most of the staff are PhD educated. They do a great job of translating technical papers to an educated lay audience and have the best comment section of any science site. Engineers, physicians, biologists, astrophysicists, etc. Really, experts in nearly every field weigh in on subjects.it's moderated and they do a pretty good job of limiting the dreck that infest most comment sections. Mfl is the only other site I visit nearly every day. |
Thanks for posting, already had read https://arstechnica.com/science/2020/06/experiments-show-hummingbirds-see-colors-youve-never-dreamed-of/ when my dear wife sent me that link... _________________ 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
|
|