De Mairan's nebula (M43)

[ollypenrice]

Bit of a cheat, really, because it's just another M42 unless I crop it like this:

We just did this new M42 in the RASA to use as a contributer to a rather exciting project we have on the go with the Samyang 135, but I was pleasantly surprised, once again, by the rig's resolution.

The image above is cropped from this:

Olly and Paul Kummer.

[gorann]

Great image Olly! Hard to believe that the RASA is not diffraction limited. Seems that we can sometimes use almost every small pixel for resolution.

[Catanonia]

@ollypenrice Wonderful, I want your dark skies to take my RASA to

So much resolution in the quad there, something to strive for me.

I take it this was using the new BXT ?

Edited February 23, 2023 by Catanonia

[ollypenrice]

35 minutes ago, Catanonia said:

@ollypenrice Wonderful, I want your dark skies to take my RASA to

So much resolution in the quad there, something to strive for me.

I take it this was using the new BXT ?

Yes BXT on three different sub lengths blended using layer masks in Photoshop.

49 minutes ago, gorann said:

Great image Olly! Hard to believe that the RASA is not diffraction limited. Seems that we can sometimes use almost every small pixel for resolution.

I know. Maybe what's deceiving is that it's not diffraction limited as an 8 inch scope, but a 400mm FL scope doesn't usually have a 200mm aperture. That still gives it room to out resolve a smaller 3.5 inch  diffraction limited scope of 400mm FL.  I think the RASA 11 would probably resolve at the limit if the seeing, here.

Olly

[ollypenrice]

43 minutes ago, Catanonia said:

@ollypenrice Wonderful, I want your dark skies to take my RASA to

So much resolution in the quad there, something to strive for me.

I take it this was using the new BXT ?

They're available...

lly

[gorann]

18 minutes ago, ollypenrice said:

Yes BXT on three different sub lengths blended using layer masks in Photoshop.

I know. Maybe what's deceiving is that it's not diffraction limited as an 8 inch scope, but a 400mm FL scope doesn't usually have a 200mm aperture. That still gives it room to out resolve a smaller 3.5 inch  diffraction limited scope of 400mm FL.  I think the RASA 11 would probably resolve at the limit if the seeing, here.

Olly

Good point. Aperture rules as usual.

[simmo39]

Stunning shot as usual. Looks like the image they took of my retina a few years back! Lol

[Maximidius]

That's a hell of an image, Olly! The detail in De Mairan's nebula (M43) and throughout the image is fantastic.