Cg4

[astroboy]

Hi all
Made this pic a couple of weeks ago be good to try again and go deeper and add RGB
Taken with the 10" F3.5 , 20 min and ST2000

Thanks
Zane

[tornado33]

Hi Zane
Nice shot, thats on the CD you sent me. The shot was taken under a very dark sky?
Scott

[[1ponders] (Paul)]

Nice definition Zane.

[Astroman (Andrew Wall)]

looks like AS&T stole your image and coloured it in
[Page 30 and 31 May AS&T ]

[iceman (Mike)]

Very nice Zane, a fascinating object.

[Striker (Tony)]

Really nice Zane.

Tell us a bit more about your Astrograph...got any pics.

[astroboy]

Thanks guys .
The 10" " Astrograph " is actualy a Meade SN10 and apo flatener , corrector , reducer that gives about 13 micron stars accross the field ( up the typical DSLR ).
I have just put in a Moonlite motorfocuser which works really well and move the Moonlite CR2 on to the 24".
Because of the the fast optics collimation is a bit of a pain but I've got it sorted now.
Be good to see what Scott can do with the image ( and others ) I'm at the bottom of the learning curve

Zane

[Itchy]

Originally Posted by astroboy

Thanks guys .
The 10" " Astrograph " is actualy a Meade SN10 and apo flatener , corrector , reducer that gives about 13 micron stars accross the field ( up the typical DSLR ).
I have just put in a Moonlite motorfocuser which works really well and move the Moonlite CR2 on to the 24".
Because of the the fast optics collimation is a bit of a pain but I've got it sorted now.
Be good to see what Scott can do with the image ( and others ) I'm at the bottom of the learning curve

Zane

OK Zane, now you really have me interested. I have an SN10 too. Tell me more about what you have done to it, please

[Lester]

There's some stuff in that photo Astroboy; very nice.

I will look out for more of your deeeeeep sky shots.

[astroboy]

[
The lens is a Borg 50mm F10 ED which are no longer available and sits about 50mm in front of the focal plane this adds a small amount of spherical aberation but is seeing limited anyway ( about 8 micron on a CCD and 13 on the corners of a DSLR ).
After seeing Scotts results from his 6" F3.5 and a coma corrector that will probably work very well too but I think the F# will stay at F4.
If you move the Schmidt Corrector 400mm forward it will cover a full 35mm but you have to put in a diagonal which isnt worth the trouble for normal DSLR.
I have found the collimation is best fine tuned with the CCD or DSLR ( just the diagonal the primary has little effect ) after the usual steps with a laser etc its different to a normal newt in that way more like a SCT.


Zane

quote=Itchy]OK Zane, now you really have me interested. I have an SN10 too. Tell me more about what you have done to it, please [/quote]

[tornado33]

Howdy Zane
A nide deep shot.
I had a play with this image of CG4 on your CD, just used Gradient xterminator photoshop plugin to even out the background, then upped the levels a bit
Scott

[astroboy]

Thanks Scott
looks a lot better

Zane