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Who squished the Sun?



 
 
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  #11  
Old March 21st 06, 05:08 PM posted to uk.sci.astronomy,sci.astro.amateur
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Default Who squished the Sun?

On Tue, 21 Mar 2006 16:53:53 -0000, "Dave Smith"
wrote:

"Pete Lawrence" wrote
My latest camera is a Canon 20Da
which has an interactive focus mode built in. Basically, I can see a
magnified view of what's falling on the sensor presented live on the
screen at the back of the camera. Saves on having to lug a laptop
around and seems to work extremely well.

--
Pete
http://www.digitalsky.org.uk


Hi Pete
Excellent photos as usual.

Is this interactive focus mode also present in the 20D (or 30D) or is it a
special feature of the 20Da.
Where can one get a 20Da in the UK?


Hi Dave,

It's unique to the 20Da I believe. As to where you can get on in the
UK... Telescope House might be able to get their hands on some at a
push. For me, I got lucky in the second hand market ;-)
--
Pete
http://www.digitalsky.org.uk
  #12  
Old March 21st 06, 08:56 PM posted to uk.sci.astronomy,sci.astro.amateur
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Default Who squished the Sun?

What a beautiful picture of the Earth at about 80 degrees perpendicular
to the Sun Earth line ( denoting orbital orientation) as your position
on Earth rotates back into the orbital shadow (night)

http://www.mhhe.com/physsci/astronom...ages/04f15.jpg

Of course you have to jettison the Ra/Dec system and approach this
appreceation by shifting your perspective to an orbital orientation
that presently is aligning at dawn ,going to a maximum deviation at
noon,and returning to a minimum deviation at dusk but this is strictly
for intutive astronomers rather than optical astronomers who are
content with taking pictures and not much else.

Forget the Solstices,the Equinox have the real astronomical substance.

 




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