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jamaeolus
Joined: 19 Mar 2014 Posts: 2964 Location: Eugene
Expire: 2015-08-20
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Posted: Tue May 31, 2016 3:39 pm Post subject: Really really big reflector 60.96M F 0.93 limited edition |
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jamaeolus wrote:
Some ridiculous numbers. Apparent focal length 200 feet.
http://www.eso.org/public/usa/teles-instr/e-elt/
Supposedly when finished in 2024 will have images 16 times sharper than the Hubble Space telescope.
Oh and its only 1.055 billion dollars. _________________ photos are moments frozen in time |
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kds315*
Joined: 12 Mar 2008 Posts: 16625 Location: Weinheim, Germany
Expire: 2021-03-09
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Posted: Tue May 31, 2016 4:23 pm Post subject: |
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kds315* wrote:
Nice lens, but earth based is a waste of money IMHO,
as HUBBLE has proven!! _________________ 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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bghomofaber
Joined: 03 Mar 2016 Posts: 154
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Posted: Tue May 31, 2016 4:43 pm Post subject: |
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bghomofaber wrote:
it won't have a good bokeh so real photographers will snub it .... |
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cyrano
Joined: 15 Feb 2013 Posts: 857 Location: UK
Expire: 2016-12-30
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Posted: Tue May 31, 2016 4:46 pm Post subject: |
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cyrano wrote:
Nul points for imaginative naming. _________________ A whole bunch of stuff. |
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jamaeolus
Joined: 19 Mar 2014 Posts: 2964 Location: Eugene
Expire: 2015-08-20
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Posted: Tue May 31, 2016 5:00 pm Post subject: |
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jamaeolus wrote:
Hopefully CA is well corrected. _________________ photos are moments frozen in time |
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Attila
Joined: 24 Feb 2007 Posts: 57865 Location: Hungary
Expire: 2025-11-18
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Posted: Tue May 31, 2016 6:29 pm Post subject: |
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Attila wrote:
bghomofaber wrote: |
it won't have a good bokeh so real photographers will snub it .... |
nice money source to elite waste money of tax payers , old people has no heat , no money .. _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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stevemark
Joined: 29 Apr 2011 Posts: 3930 Location: Switzerland
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Posted: Wed Jun 01, 2016 8:58 pm Post subject: |
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stevemark wrote:
kds315* wrote: |
Nice lens, but earth based is a waste of money IMHO,
as HUBBLE has proven!! |
No, not any more. The telescope will have adaptive optics; they actively correct atmospheric interferences / turbulences by measuring them with laser beams and constantly changing the shape of the mirror:
https://en.wikipedia.org/wiki/Adaptive_optics
Otherwise such a large mirror would be quite useless.
Stephan _________________ www.artaphot.ch |
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Lightshow
Joined: 04 Nov 2011 Posts: 3666 Location: Calgary
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Posted: Thu Jun 02, 2016 3:14 am Post subject: |
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Lightshow wrote:
Till this is finished, the premier telescope will be the James Webb space telescope to launch in 2018.
http://jwst.nasa.gov/about.html _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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Billou
Joined: 01 Feb 2013 Posts: 169 Location: Germany
Expire: 2015-05-19
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Posted: Thu Jun 02, 2016 9:58 am Post subject: |
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Billou wrote:
Quote: |
nice money source to elite waste money of tax payers , old people has no heat , no money ..
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Ah, the old question. ''Why spend all this money here and not on fighting poverty ?''
Well, first the money is not sent into space. It will make a lot of companies and suppliers happy for many years, and I know people working in optics and space, they are not really 'elite'. They don't have ferraris and Rolls Royces, and they don't study space from the executive suite of the Hilton in Singapore.
It will go to thousands of engineers, scientists, workers, for decades. And the cost is not just building the thing, but also operating it for decades and decommission it later. And it needed years of studies and thinking from many countries before getting built.
So, why don't you spend your salary and spare time on fixing the potholes in the roads of your area ? Or give it to the homeless people that would need it way more than you ?
Same thing. |
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bghomofaber
Joined: 03 Mar 2016 Posts: 154
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Posted: Thu Jun 02, 2016 2:35 pm Post subject: |
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bghomofaber wrote:
Billou wrote: |
Quote: |
nice money source to elite waste money of tax payers , old people has no heat , no money ..
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Ah, the old question. ''Why spend all this money here and not on fighting poverty ?''
Well, first the money is not sent into space. It will make a lot of companies and suppliers happy for many years, and I know people working in optics and space, they are not really 'elite'. They don't have ferraris and Rolls Royces, and they don't study space from the executive suite of the Hilton in Singapore.
It will go to thousands of engineers, scientists, workers, for decades. And the cost is not just building the thing, but also operating it for decades and decommission it later. And it needed years of studies and thinking from many countries before getting built.
So, why don't you spend your salary and spare time on fixing the potholes in the roads of your area ? Or give it to the homeless people that would need it way more than you ?
Same thing. |
what your naming is keynesianism, and it works to a certain extent. main problem is that to fight poverty, and more broadly to really rule a state as it should be, a politics of reindustrialization should be undertaken, bringing back to europe all indiustries ended up in the former thirld world for the myopic joy of international financers and speculating industrialists with no patriotic feelings (if they ever had).
if you consider that such public works are financed out of taxes, you may understand that the most basic tenet of an healthy economy is an healthy private industry, which can finance decent and intelligent public works that are useful for the public good and are not of interest to private enterprises like astronomy projects (science has ever a big fallout in the private sector, but not immediately). |
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visualopsins
Joined: 05 Mar 2009 Posts: 10956 Location: California
Expire: 2025-04-11
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Posted: Thu Jun 02, 2016 6:36 pm Post subject: |
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visualopsins wrote:
stevemark wrote: |
kds315* wrote: |
Nice lens, but earth based is a waste of money IMHO,
as HUBBLE has proven!! |
No, not any more. The telescope will have adaptive optics; they actively correct atmospheric interferences / turbulences by measuring them with laser beams and constantly changing the shape of the mirror:
https://en.wikipedia.org/wiki/Adaptive_optics
Otherwise such a large mirror would be quite useless.
Stephan |
Yes, yes, I almost replied similar, however I agree with kds315* because I believe the lasers input can introduce errors, such as imprecise correction or interference. I can imagine some object in plain view nobody knows about because atmospheric interference corrections blank it out! _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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jamaeolus
Joined: 19 Mar 2014 Posts: 2964 Location: Eugene
Expire: 2015-08-20
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Posted: Thu Jun 02, 2016 6:53 pm Post subject: |
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jamaeolus wrote:
visualopsins wrote: |
stevemark wrote: |
kds315* wrote: |
Nice lens, but earth based is a waste of money IMHO,
as HUBBLE has proven!! |
No, not any more. The telescope will have adaptive optics; they actively correct atmospheric interferences / turbulences by measuring them with laser beams and constantly changing the shape of the mirror:
https://en.wikipedia.org/wiki/Adaptive_optics
Otherwise such a large mirror would be quite useless.
Stephan |
Yes, yes, I almost replied similar, however I agree with kds315* because I believe the lasers input can introduce errors, such as imprecise correction or interference. I can imagine some object in plain view nobody knows about because atmospheric interference corrections blank it out! |
The only answer is a 40M space telescope. Gonna need a REALLY BIG ROCKET! _________________ photos are moments frozen in time |
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Lightshow
Joined: 04 Nov 2011 Posts: 3666 Location: Calgary
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Posted: Thu Jun 02, 2016 8:45 pm Post subject: |
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Lightshow wrote:
jamaeolus wrote: |
visualopsins wrote: |
stevemark wrote: |
kds315* wrote: |
Nice lens, but earth based is a waste of money IMHO,
as HUBBLE has proven!! |
No, not any more. The telescope will have adaptive optics; they actively correct atmospheric interferences / turbulences by measuring them with laser beams and constantly changing the shape of the mirror:
https://en.wikipedia.org/wiki/Adaptive_optics
Otherwise such a large mirror would be quite useless.
Stephan |
Yes, yes, I almost replied similar, however I agree with kds315* because I believe the lasers input can introduce errors, such as imprecise correction or interference. I can imagine some object in plain view nobody knows about because atmospheric interference corrections blank it out! |
The only answer is a 40M space telescope. Gonna need a REALLY BIG ROCKET! |
Space telescopes don't need the size as badly as ground based telescopes, the Hubble can lock on to an object for days, ground based telescopes are limited to about 12 hours because of the rotation of the earth.
Edit: I knew they had about 30 hour exposures at different wavelengths, but I missed that they broke that up with multiple exposures.
https://en.m.wikipedia.org/wiki/Hubble_Deep_Field
Quote: |
Between December 18 and December 28, 1995—during which time Hubble orbited the Earth about 150 times—342 images of the target area in the chosen filters were taken. The total exposure times at each wavelength were 42.7 hours (300 nm), 33.5 hours (450 nm), 30.3 hours (606 nm) and 34.3 hours (814 nm), divided into 342 individual exposures to prevent significant damage to individual images by cosmic rays, which cause bright streaks to appear when they strike CCD detectors. A further 10 Hubble orbits were used to make short exposures of flanking fields to aid follow-up observations by other instruments.[6] |
_________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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TeemÅ
Joined: 07 Apr 2016 Posts: 586 Location: Australia
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Posted: Fri Jun 03, 2016 1:46 am Post subject: Re: Really really big reflector 60.96M F 0.93 limited editio |
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TeemÅ wrote:
jamaeolus wrote: |
Some ridiculous numbers. Apparent focal length 200 feet.
http://www.eso.org/public/usa/teles-instr/e-elt/
Supposedly when finished in 2024 will have images 16 times sharper than the Hubble Space telescope.
Oh and its only 1.055 billion dollars. |
That's an incredible bargain considering Australia just paid $4.1b each for 12 submarines... and they're not even nuclear! |
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