Eclipse of moon on Oct. 27

"Crownfield" wrote in message
...
Prometheus wrote:

In article OwCcd.265533$D%.83619@attbi_s51, William Graham
writes
"Prometheus" wrote in message
...
In article , Lassi Hippeläinen
writes
Prometheus wrote:
I wonder if there are any nuclear bomb pumped lasers left over
from the star wars project.

Even if there were, you would have to remote them quite a ways from
your
camera.........

Ah, yes. The neutron flux could overload the sensor, and as for what the
NEMP would do to the non-hardened electronics...

and as for the photographer...


Naah, just stick it on the other side of the Earth, so long as it has a
clear view of the moon, and fire it with a Pocket Wizard. The slight lack
of illumination on one rim due to the offset isn't a big deal, and you could
always use a reflector for some bounce fill.


Peter

"C J Donoghue" wrote in message
...
Alan Browne wrote:

William Graham wrote:

Unless you've got a flash with a guide number of 250 thousand
miles........

That would require an f/1 lens for ISO 100. If the lens is f/4 then
a GN of
1,000,000 miles would be required...

--
-- rec.photo.equipment.35mm user resource:
-- http://www.aliasimages.com/rpe35mmur.htm
-- e-meil: there's no such thing as a FreeLunch.--

Uhh, why flash the moon to capture an eclipse? The whole point about
photographing an eclipse is that the moon is *dark*. Reminds me of
the tale
about RCA's release of their first television receiver ... the media
photogs
lined up with their 5x4 Graflexes or whatever, and duly, one by one,
popped off
their flashguns, obliterating the picture displayed on the screen ...




--
--
Frank ess

"Because of the Swiss Cheese nature of everyone's life experience and
education, the Whoosh Bird can drop a load on anyone's head, without
warning." -Albrecht Einstein

In article ,
Frank ess wrote:
Or consider other unusual shots. For example, I did a panorama of a
NASA lab with the moon:


http://pic.templetons.com/cgi-bin/im...es-eclipse.jpg

Which captures cool buildings, lights, people watching the eclipse,
and the moon. Try for something in this direction.
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How to fix the DNS system and break up ICANN
http://www.templetons.com/brad/dns/

I have neither the skill nor the patience to make a work like that. I
appreciate your doing it so I can see an exciting, strangely serene
view. Thank you for the opportunity.

It takes no particular skill or patience. If you don't want calculate
the azimuth of the moon (any web planetarium program will show you
that, I think heavens-above star maps will show it) then because an
eclipse lasts an hour, you can hunt around your subject easily enough.

If you don't want to drive, try putting something local, such as trees,
or a model. Seat the model on something higher like a ladder if the
moon will be high during the eclipse.
--
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In article ,
Frank ess wrote:
Or consider other unusual shots. For example, I did a panorama of a
NASA lab with the moon:


http://pic.templetons.com/cgi-bin/im...es-eclipse.jpg

Which captures cool buildings, lights, people watching the eclipse,
and the moon. Try for something in this direction.
--
How to fix the DNS system and break up ICANN
http://www.templetons.com/brad/dns/

I have neither the skill nor the patience to make a work like that. I
appreciate your doing it so I can see an exciting, strangely serene
view. Thank you for the opportunity.

It takes no particular skill or patience. If you don't want calculate
the azimuth of the moon (any web planetarium program will show you
that, I think heavens-above star maps will show it) then because an
eclipse lasts an hour, you can hunt around your subject easily enough.

If you don't want to drive, try putting something local, such as trees,
or a model. Seat the model on something higher like a ladder if the
moon will be high during the eclipse.
--
How to fix the DNS system and break up ICANN
http://www.templetons.com/brad/dns/

Lassi Hippeläinen wrote:

Alan Browne wrote:
The diameter of the moon is ca. 3.48E6 meters. For the edges you would need
1/2 of that. C is about 3E8 m/s, giving an image return of about 5.8ms.
so a shutter speed up to 1/172 of a second would work if rear curtain began
falling 1/172 of a second after leading edge of light returned. (Call it
1/160 then).


But this is radar business. The light has to travel there and back again, so
the total delay is twice the difference in distance, or 1/86. 1/60 leaves
some room for inaccuracies.


Ach! you're right! When the first photons are already one-half moon diameter
back towards earth, the last photons are just reaching the horizon of the moon
and beginning their return trip... Argh!

Cheers,
Alan

--
-- rec.photo.equipment.35mm user resource:
-- http://www.aliasimages.com/rpe35mmur.htm
-- e-meil: there's no such thing as a FreeLunch.--

Lassi Hippeläinen wrote:

Alan Browne wrote:
The diameter of the moon is ca. 3.48E6 meters. For the edges you would need
1/2 of that. C is about 3E8 m/s, giving an image return of about 5.8ms.
so a shutter speed up to 1/172 of a second would work if rear curtain began
falling 1/172 of a second after leading edge of light returned. (Call it
1/160 then).


But this is radar business. The light has to travel there and back again, so
the total delay is twice the difference in distance, or 1/86. 1/60 leaves
some room for inaccuracies.


Ach! you're right! When the first photons are already one-half moon diameter
back towards earth, the last photons are just reaching the horizon of the moon
and beginning their return trip... Argh!

Cheers,
Alan

--
-- rec.photo.equipment.35mm user resource:
-- http://www.aliasimages.com/rpe35mmur.htm
-- e-meil: there's no such thing as a FreeLunch.--

Frank ess wrote:

Uhh, why flash the moon to capture an eclipse? The whole point about
photographing an eclipse is that the moon is *dark*. Reminds me of

Lookup: "lunar eclipse" v. "solar eclipse".

In any case, the whole preceding discourse is a lark.

Even for a lunar eclipes, part of the attraction is the reddening of the moon.
http://www.mreclipse.com/Special/LEprimer.html and a strong enough flash
(yowza!) would whiten that out.

Cheers,
Alan


--
-- rec.photo.equipment.35mm user resource:
-- http://www.aliasimages.com/rpe35mmur.htm
-- e-meil: there's no such thing as a FreeLunch.--

Frank ess wrote:

Uhh, why flash the moon to capture an eclipse? The whole point about
photographing an eclipse is that the moon is *dark*. Reminds me of

Lookup: "lunar eclipse" v. "solar eclipse".

In any case, the whole preceding discourse is a lark.

Even for a lunar eclipes, part of the attraction is the reddening of the moon.
http://www.mreclipse.com/Special/LEprimer.html and a strong enough flash
(yowza!) would whiten that out.

Cheers,
Alan


--
-- rec.photo.equipment.35mm user resource:
-- http://www.aliasimages.com/rpe35mmur.htm
-- e-meil: there's no such thing as a FreeLunch.--

In rec.photo.digital William Graham wrote:

"Paul J Gans" wrote in message
...
In rec.photo.digital Sander Vesik wrote:
In rec.photo.equipment.35mm wrote:
On Sat, 16 Oct 2004 03:27:13 GMT, Gordon Zola
wrote:

... turn off ... the flash. :-/

Yeah, one guy could wreck it for everyone. :-)

yeah it was bloody well time people gave up on flash
setups that were powered off nuclear reactors and cost
more than the dept of State of California just so they
can capture shadow delail on the Moon :P

It was a government project.....

It must have been a spin-off of the "Star Wars" project.

Sure. After all, something has to keep the moon lit
up at night... ;-)

----- Paul J. Gans

In rec.photo.digital William Graham wrote:

"Paul J Gans" wrote in message
...
In rec.photo.digital Sander Vesik wrote:
In rec.photo.equipment.35mm wrote:
On Sat, 16 Oct 2004 03:27:13 GMT, Gordon Zola
wrote:

... turn off ... the flash. :-/

Yeah, one guy could wreck it for everyone. :-)

yeah it was bloody well time people gave up on flash
setups that were powered off nuclear reactors and cost
more than the dept of State of California just so they
can capture shadow delail on the Moon :P

It was a government project.....

It must have been a spin-off of the "Star Wars" project.

Sure. After all, something has to keep the moon lit
up at night... ;-)

----- Paul J. Gans