First light Williams Optics

[Mac]

Just a quick setup before i went to work,

William optics, 90mm F 6.9 on EQ6.

Polar aligned---Nope, just stuck in the back garden, sort of facing north, ish.

Stack of 30 Ha best 95% chosen,
Wavelets applied
Levels adjusted in photoshop.

[Ian]

well that seems to work mate

[Carole]

That's a fantastically clear and well focussed image Mac.

Well done

Carole

[MarkS]

The moon in Ha?  Which camera were you using?

A good clear image you've got there Mac!

Mark

[Mac]

The moon in Ha?

Yup.

I was using the starlight express SXVF-H9
With the Ha filter, selected.
So although it is in Ha, its not realy,
As the moon's light is just reflected sun light, it is lit with all wavelengths,
i.e. white light,

This is just the Ha band.

i'll post some more later, one in each of, Ha, Hb, Oiii, and Lum.

Mac.

[Rocket Pooch]

very crisp

[RobertM]

Great shot and excellent detail Mac, It's good to see some results with that setup of yours.

btw. is that the WO triplet APO ?

[Fay]

Mac, that is some image!!!!! Going to be amazing when you have added all the rest of the exposures. How long were the subs?

[Mike]

Very nice. Do you have a link to the full sized image?

[JohnP]

Looks very nice Mac... You could almost cut your finger on it..... it looks so sharp... John

[Mac]

btw. is that the WO triplet APO

pass. not too sure, here are the details of the scope.

http://www.firstlightoptics.com/proddetail.php?prod=WOmegrez90

How long were the subs?

0.09 secs!!

Very nice. Do you have a link to the full sized image?

That was the fullsized i think, but i did post it on the gallery.
http://gallery.orpington-astronomy.org.uk/displayimage.php?pid=689&fullsize=1

Mac.

[Tony G]

Great image Mac, very sharp.

Tony G

[Mac]

Now that i can access my website, i've reprocessed, and added two originals for comparison.



Reprocessed,
Stacked the best >95% from the original 64 Ha, only.
Each frame 0.09 seconds.
WO 90mm F6.9
Starlight Express SXVF-H9 all on a  HEQ6 pro mount.
I wasn't so aggrssive with the wavelets this time,
and only applied a small amount of unsharp mask.

Here are two single frames. resized down 50% for size here.
The first one is one of the lum files, but there is a lot of reflection/ghosting on the top of the image,
There was no cloud, and this was taken with a IR/UV filter.



This is one of the best frames from the Ha set,
note that the reflection/ghosting has gone.

[Fay]

I can't see any ghosting, Mac.

[Mac]

I can't see any ghosting, Mac.

Fay i've overprocessed the lum file and shaded the ghosting in red so its a little more obvious.
with the original for comparison.




Mac.

[Fay]

Ok I see it now

[JohnP]

Mac - No idea why you get the ghosting - Maybe it's internal reflection or something caused by the bright light that passes through the IR/UV filter - obviously when you switch to using the Ha the light levels are lower so it's not an issue..

I like the 2nd reprocess by the way - not quite as sharp as the first but it looks more natural to me... Good Job.

John

[Ian]

I wonder if it's a form of blooming? I get that with my D70 sometimes.

[JohnP]

I wonder if it's a form of blooming?

Could well be that would make sense..

[Mike]

I get the same if I try to image the moon using the SXV-H9 on my ED80. I gave up in the end and used my Nikon.