Posts Made By: Larry Citro

hi,

A great image. I havn't seen any better.

clear skies,

Larry Citro

hi,

I have a Tak Mewlon 250 and it does have "refractor like" performance. The 250 and the 180 have the same Dahl-Kirkham design with the exception of the focuser. The 180 has a moving mirror and the 250 has a moving secondary ( no image shift problems ).

Here's an interesting link comparing the 250 to a 6" and a 7" APO refractor.

clear skies,

Larry Citro

Opps ..

here's the link

http://www.scottsquires.com/Astronomy.htm

Opps ..

here's the link

http://www.scottsquires.com/Astronomy.htm

hi Ron,

Very nice rendition of the Sombrero. Many of the images on the web look too red, yours doesn't. I like the detail in the dust lanes and the transparency of the galatic buldge.

The image is a pleasure to look at.


clear skies .. in NM and WA

Larry Citro

hi Tan,

beautiful imagres. What software are you using to select and atack the images you get ?

clear skies,

Larry Citro

hi Ron,

Looks like those NM skies can support hires imaging. The combo you ued gave about .7 arcsec/pixel, I guess which can give a FWHM of about 1.8 to 2 arc sec. For me where I am in PA that's what I get on my very best (very few) nights.

It would be interesting to see how the ST-10 at 2x2 binning compares to the 1000 unbinned ( I think in the past I saw some of your images made with the ST-1000 ). I think the 1000 would be more sensitive at the native FL. (?)

An interesting question in my mind re hires imaging ( defined in the SBIG group as 1 to 1.5 arcsec FWHM) is ...for aesthetic purposes only at what point does reslolution make a difference? For very small objects such as planetary nebulas (less than 1 arc min in size ) the gain in visual impact seems intutitively obivious. For larger objects such as galaxies which can be quite large ..the question is unanswered. It would be interesting to compare images say of m51 presented at the same size (say 1100 x 800 or 800 x 600 ) taken at different pixel resolutions (ie at .4, .8 and 1.2 arcsec/pixex or whatever)and see what they look like.

Oh well just some meandering thoughts over my morning coffee.

Keep shooting the stars, the images are great and I look forward to seeing them.

clear skies,


Larry Citro

hi Ron,

A stunning image of m100... one of those lost unappreciated galaxies along with its faint comapanions...surely it is an example of the beauty of the heavens.

clear skies,

Larry Citro

Hi,

Wow ! Images like that can turn this object into one of the celestial showpieces. I love the colors of the stars... particularly the litte double in the right edge of the image with its orange and red hues.

Colored stars are even showing trough the nebulosity.


clear skies,


Larry Citro

hi Ron,

That c-14 is shining as brightly as those galaxies. Absolutly a super image !

clear skies,

Larry Citro