Another Ha iamge from NMS

Here is a 100% Crop of M8 Region only in HA. This is also taken with the FCT-150 @f5 and STL-11000. 3+ hours of HA data, in 20Min sub-exposures.

Mark Hanson

Attached Image:

That image is a work of art. Are you sure you posted in the right forum?

Mark, very nice image! I do detect a slight oval shape to the stars in the left and right upper corners that do not exist in the other portions of the image. I thought the FCT-150 has a flat field. Is this correct? Could this be an artifact from the align/combine routine you used? I should think that the polar alignment would have been dead on since you were at NMS. Did you use one of their permanent mounts? This doesn't really look like field rotation to me, more like an uncorrected flat field from a very fast focal ratio scope on a large CCD chip. What is your take on it?

BTW, I love the detail in the nebula proper.

Tom

HI,

Beautiful image.


Larry Citro

Wonderful Image Mark!
I love those Ha shots, they make the nebula stand out so much!

Thanks for sharing!