When was the telescope invented?

"Jonathan Silverlight" wrote
in message ...
In message , Martin
writes

"Jonathan Silverlight"
wrote
in message ...
In message , Martin
writes

Rather like the mistake people make quoting John Logey Baird as the
inventor
of the television or Frank Whittle as the inventor of the jet engine.

But Frank Whittle _was_ the first person to patent a design which is
essentially the same as a modern turbojet. After doing a bit of
searching
I'm guessing this is GB347206
http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=GB347206&F=0


Whittle gets the credit because the Germans lost the war!!!


Sir Frank gets the credit because he was first. With a bit more support
(as in the case of the case of the Miles M52, which could have been the
world's first supersonic aircraft) we could have had the first jet
aircraft. The Germans independently invented a jet engine and used it in
the first jet. Live with it.

Yes, but my point was the version THEY invented is the version in use today.
Not Whittle's. The credit for the modern jet engine goes to Germany not
Frank Whittle. The point I was originally trying to make Jonathan is that
the patent owner or the "first" is not always the one who should get the
credit.

You are correct in that this Country has always been poor at exploiting our
cutting edge design and technology for mass market (and in the case of
Whittle he was treated like crap by and large). We more or less gave our jet
engine technology away for free. I often wonder what the World Wide Web
would have been like has the web browser been invented by an American! Ther
is much evidence to show the yanks got many of their ideas from the Miles
aircraft company's M52 to use on the X-1, again for free. Don't you just
love politicians!

I can live with it! Just annoying that people who deserve credit often get
wiped from history.

Martin

Peter Hayes wrote:
I thought it was around 1607, but in Channel 4's "Elizabeth" Leicester
is shown looking through his telescope to identify one of Drake's
sailing ships returning from defeating the Spanish Armada in 1588.

Probably a Digges telescope. IIRC it was a catadioptric, using an
objective lens and a convex mirror as an eyepiece. Attempts to recreate
it have resulted in something with a tiny field of view. However, it
resulted in telescopic drawings of the Moon dating from before the
Lippershey telescope (and, therefore, pre-Galileo).


Best,
Stephen

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Stephen Tonkin wrote:

Peter Hayes wrote:
I thought it was around 1607, but in Channel 4's "Elizabeth" Leicester
is shown looking through his telescope to identify one of Drake's
sailing ships returning from defeating the Spanish Armada in 1588.

Probably a Digges telescope. IIRC it was a catadioptric, using an
objective lens and a convex mirror as an eyepiece. Attempts to recreate
it have resulted in something with a tiny field of view. However, it
resulted in telescopic drawings of the Moon dating from before the
Lippershey telescope (and, therefore, pre-Galileo).

Interesting, thanks.

Apparantly it gave an inverted image,

http://www.chocky.demon.co.uk/oas/diggeshistory.html

"The solution to seeing an upright image, and which is how the
Elizabethan telescope has been built, requires a viewer to stand over
the end looking backwards into the box."

If that's the case, then it's a pity the producers didn't show the
telescope properly. It looked to me like any small 1" refractor
telescope you can buy for a fiver at an antique fair. Poetic licence,
perhaps?

--

Peter

There appears to be a lapse in editing on the page referred to. The
copyright statement is dated 2002, but an attack on John Dee's reputation is
described as lasting until "almost the second decade of this present
century" - which if really written in 2002 has yet to happen!

"Peter Hayes" wrote in message
om...
Interesting, thanks.

Apparently it gave an inverted image,

http://www.chocky.demon.co.uk/oas/diggeshistory.html

"The solution to seeing an upright image, and which is how the
Elizabethan telescope has been built, requires a viewer to stand over
the end looking backwards into the box."

If that's the case, then it's a pity the producers didn't show the
telescope properly. It looked to me like any small 1" refractor
telescope you can buy for a fiver at an antique fair. Poetic licence,
perhaps?

--

Peter

I can't help feeling that "playing" with 2 convex lenses might be tried
repeatedly throughout history. But the inverted image was considered
too confusing to be of much practical use.

In message .com,
Chris.B writes
I can't help feeling that "playing" with 2 convex lenses might be tried
repeatedly throughout history. But the inverted image was considered
too confusing to be of much practical use.

I had thought that a concave and convex objective was the earliest known
gives an upright image ..
The glasses attachments worn by surgeons ... are these the same system.
--
dd

Peter Hayes wrote:
I thought it was around 1607, but in Channel 4's "Elizabeth" Leicester
is shown looking through his telescope to identify one of Drake's
sailing ships returning from defeating the Spanish Armada in 1588.

G'Day Peter.
Years ago in the old days of early ITV (c 1958) I still remember
seeing Francis Drake in a costume drama using one returning from his
circumnavigation in 1581.
At last I thought, now I know how he always got the advantage over the
Spaniards!!!
BTW is that from the old Bette Davis movie "Elizabeth and Leicester"?
If so I think I remember the scene.

Regards Cliff Wright.