Who squished the Sun?

A beautiful clear day for once, ending is a lovely sunset over the
sea. Interesting to compare the size of the Sun's apparent disk from
being high up in the sky and low down, close to the horizon.

http://www.digitalsky.org.uk/solar/2006-03-19.html
--
Pete
http://www.digitalsky.org.uk

"Pete Lawrence" wrote in message
...
A beautiful clear day for once, ending is a lovely sunset over the
sea. Interesting to compare the size of the Sun's apparent disk from
being high up in the sky and low down, close to the horizon.

http://www.digitalsky.org.uk/solar/2006-03-19.html
--
Pete
http://www.digitalsky.org.uk


A very fine image Pete, the church spire? is a clever detail.



A question

I have just received a DSLR (bought for the eclipse) and as we have a clear
night I am trying a few wide field images with the stock lens, can you
achieve a sharp focus with manual focus and the viewfinder or do you use
another method?



Many thanks for sharing

Darren.

On Sun, 19 Mar 2006 20:33:29 -0000, "Spr_astro"
wrote:

A question

I have just received a DSLR (bought for the eclipse) and as we have a clear
night I am trying a few wide field images with the stock lens, can you
achieve a sharp focus with manual focus and the viewfinder or do you use
another method?

Eyeballing it can work but it's difficult to achieve 100% accuracy. A
thin Moon (if up) is great for achieving focus before switching to the
stars. Failing this, use a bright star is the next best option.

For better results either use a Hartmaan Mask or, if you have a laptop
available and your DSLR is one of the models covered, use a program
called DSLRFocus (www.dslrfocus.com). 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

"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?

Dave Smith

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

Pete Lawrence wrote:
A beautiful clear day for once, ending is a lovely sunset over the
sea. Interesting to compare the size of the Sun's apparent disk from
being high up in the sky and low down, close to the horizon.

http://www.digitalsky.org.uk/solar/2006-03-19.html

Just wanted to tell, that I am eager reading your postings and enjoying
your images for already some months and nearly can't imagine this
newsgroup without your posts to it.
Thanks for sharing all your interesting and beautiful results here.

Claudio

Pete Lawrence nous a donc écrit :

A beautiful clear day for once, ending is a lovely sunset over the
sea. Interesting to compare the size of the Sun's apparent disk from
being high up in the sky and low down, close to the horizon.

http://www.digitalsky.org.uk/solar/2006-03-19.html

Nice sunset Pete.
You're always lucky, to be able to see the sun

--
Norbert. (no X for the answer)
======================================
knowing the universe - stellar and galaxies evolution
http://nrumiano.free.fr
images of the sky http://images.ciel.free.fr
======================================

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.