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Waxing Gibbous 72.5%
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01-02-2012, 04:48 PM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 17,893
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337mm APO for US$4500!
How's about this?
http://photorumors.com/2012/01/23/now-this-is-a-lens/
Its 200lbs but.
Also not sure you can buy it outside of US but maybe.
Could be a winner for astrophotography if you have a beefy mount.
I saw it listed on ebay for US$4500 as well. There may be more than one.
Greg.
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01-02-2012, 05:06 PM
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The 'DRAGON MAN'
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Join Date: Jan 2005
Location: In the Dark at Snake Valley, Victoria
Posts: 14,412
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a 12 1/2" Apo
VERY cheap!
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01-02-2012, 05:19 PM
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Registered User
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Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,980
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They accidentally reduced the number of zeros in that price tag by a factor of 10
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01-02-2012, 05:35 PM
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Registered User
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Join Date: Jan 2009
Location: Adelaide
Posts: 9,944
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Quote:
Originally Posted by gregbradley
How's about this?
http://photorumors.com/2012/01/23/now-this-is-a-lens/
Its 200lbs but.
Also not sure you can buy it outside of US but maybe.
Could be a winner for astrophotography if you have a beefy mount.
I saw it listed on ebay for US$4500 as well. There may be more than one.
Greg.
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You might need a huge sensor to go with it. Most likely this was attached to a large format film back.
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01-02-2012, 06:05 PM
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ze frogginator
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Join Date: Oct 2007
Location: Sydney
Posts: 22,062
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Here's where it was last mounted on.
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01-02-2012, 06:42 PM
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Registered User
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Join Date: Jan 2009
Location: Adelaide
Posts: 9,944
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It was the most beautiful aircraft ever designed. Elegant and with high speed.
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01-02-2012, 07:07 PM
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Registered User
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Join Date: Jul 2008
Location: Melbourne
Posts: 2,452
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Quote:
Originally Posted by Paul Haese
It was the most beautiful aircraft ever designed. Elegant and with high speed.
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Ditto.
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01-02-2012, 07:48 PM
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The 'DRAGON MAN'
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Join Date: Jan 2005
Location: In the Dark at Snake Valley, Victoria
Posts: 14,412
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Quote:
Originally Posted by Paul Haese
You might need a huge sensor to go with it. Most likely this was attached to a large format film back.
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It will work with any sized sensor as long as it is smaller than the sensor it was designed for (and that shouldn't be hard, we ALL have smaller sensors than it was designed for )
With the sensor sizes we use, Vignetting is a thing of the past!
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01-02-2012, 07:58 PM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,106
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Quote:
Originally Posted by Paul Haese
It was the most beautiful aircraft ever designed. Elegant and with high speed.
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I've been lucky enough to have stood on the deck of the Intrepid (docked as the New York Air and Space Museum ) and ran my hands over the (quite sharp) leading edges of an SR-71....would loved to have flown one...
For those interested there is a book called "Sled Driver" by Brian Shul that covers the history of this magnificent aircraft.
Cool lens BTW
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01-02-2012, 09:00 PM
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Registered User
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Join Date: May 2009
Location: Para Hills, South Australia
Posts: 3,620
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Loved that aircraft when I was a kid, found out recently it was taken away because the expansion and contraction caused it to leak fuel ever trip.
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01-02-2012, 09:56 PM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,106
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Quote:
Originally Posted by mswhin63
Loved that aircraft when I was a kid, found out recently it was taken away because the expansion and contraction caused it to leak fuel ever trip.
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Yes, full of fuel on the ground, it did leak like a sieve, but that was not the reason for its retirement.
I'd put that down to nerds wanting to play with UAV's
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01-02-2012, 10:17 PM
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Registered User
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Join Date: May 2011
Location: Freo WA
Posts: 1,443
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Errm... I am reluctant to point this out, but a 36" (910mm) focal length lens with a focal ratio of f/4 must by definition have an effective aperture of 9 inches (228mm)
I am guessing that 337mm mentioned in the advert is the diameter of the mechanical housing, not the clear aperture. The caveat to this is if there is an internal field stop for
the purpose of controlling vignetting, in which case the front element may in fact be 337mm, but in any event... it is effectively a 9" lens... period.
But you guys knew that, right?
Last edited by clive milne; 01-02-2012 at 10:40 PM.
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01-02-2012, 10:18 PM
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Not enough time and money
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Join Date: Aug 2011
Location: Melbourne
Posts: 2,133
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Yep, the plane is usually fuled quarter full. Then it takes off, do a couple of rapid climbs and dives to warm up the plane and close the gaps before heading to a refueling tanker to take on more fuel. I think it was also the first of not the only plane made predominately of titanium.
But back to that lump of glass, what a thing of beauty. Typically cold war vintage, built like a tank.
Bo
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01-02-2012, 11:14 PM
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Registered User
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Join Date: Jan 2006
Location: Sydney
Posts: 753
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Quote:
Originally Posted by clive milne
Errm... I am reluctant to point this out, but a 36" (910mm) focal length lens with a focal ratio of f/4 must by definition have an effective aperture of 9 inches (228mm)
I am guessing that 337mm mentioned in the advert is the diameter of the mechanical housing, not the clear aperture. The caveat to this is if there is an internal field stop for
the purpose of controlling vignetting, in which case the front element may in fact be 337mm, but in any event... it is effectively a 9" lens... period.
But you guys knew that, right?
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Regardless - I wish I have one like that. The beauty of the retractor (among of all other things) is that you can leave it covered by rubbish bag and trampoline on the pier in your backyard and unless you live in tropics or sandblast the lens, it will be just as good in twenty years time as it was when you first got it.
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02-02-2012, 01:42 AM
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Registered User
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Join Date: Jan 2005
Posts: 2,943
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That plane is just so cool, I dont recall how much time i spent as a young kid gathering pictures of it from every book i could get my hand on.
And then there was that movie with a kid flying on of these, DARYL. Data Analyising Robotic Youth Lifeform. I wish they would give the ability for the public to pay for rides on that plane. I would sure like to just get close to one and take a look at her.
What was that about a big telescope... give me the SR-71 any day. I think if it were not for that plane i would have never gone to uni or done engineering. Well that plane, Startrek, Dr Who, Beyond 2000.....
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02-02-2012, 01:59 AM
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The 'DRAGON MAN'
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Join Date: Jan 2005
Location: In the Dark at Snake Valley, Victoria
Posts: 14,412
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Interesting how there is 2 seperate conversations going on in this one thread
One about the original topic, the camera lens,
the other about the Blackbird!
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02-02-2012, 07:30 AM
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ze frogginator
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Join Date: Oct 2007
Location: Sydney
Posts: 22,062
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Quote:
Originally Posted by ballaratdragons
Interesting how there is 2 seperate conversations going on in this one thread
One about the original topic, the camera lens,
the other about the Blackbird!
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Seems I've got a knack for going off topic. Sorry.
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02-02-2012, 08:38 AM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 17,893
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I like the SR71's basic defence - accelerate and outrun the missiles!
The engines sound unique as well as part turbofan, part ram jet and the limiting factor
for the speed of the jet is the temperature the air intake of the engines can take!
Greg.
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02-02-2012, 08:48 AM
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Registered User
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Join Date: Nov 2007
Location: Sydney, Australia
Posts: 1,648
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Many years ago 'Australian Aviation' published a transcript of an SR-71 pilot talking to air traffic control.
The pilot had asked permission to fly at level 1100 (110,000 ft), whereupon the ATC officer, not realising the ability of the aircraft she was talking to, had retorted "Sure, go ahead if you think you can do it".
The SR-71 pilot then replied "(SR-71 name) descending to flight level 1100"
Silence from ATC.
Cheers,
Jason.
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