Rosette - HOO

[ollypenrice]

19 minutes ago, kirkster501 said:

Indeed, on the MESU I mostly have pancake flat guide graph.  But there are many nights here where the guiding is all over the place.  From my records on a decent night i get abou 0.2arcsec RMS on the MESU.  The NEQ6 is not as good - as it wouldn't at a fifth of the price - but still very, very good.  0.5 RMS.  

Those are excellent values.

Olly

[gorann]

Great image! Could I ask what Canon 200 mm that is - very impressive star shapes.

[JamesF]

32 minutes ago, gorann said:

Great image! Could I ask what Canon 200 mm that is - very impressive star shapes.

I would guess this one, from the earlier photo:

https://www.canon.co.uk/lenses/ef-200mm-f-2-8l-ii-usm-lens/

James

[gorann]

58 minutes ago, JamesF said:

I would guess this one, from the earlier photo:

https://www.canon.co.uk/lenses/ef-200mm-f-2-8l-ii-usm-lens/

James

Obviously a very nice lens, Had a look at ebay and used it appears to be a very affordable choise for high quality wide field astrophotography,

[Adreneline]

13 hours ago, gorann said:

Great image! Could I ask what Canon 200 mm that is - very impressive star shapes.

Hi Göran

@JamesF is correct with the lens. I have been using the Samyang a lot over the last 18 months but decided to invest in a lens I can use for AP and is more easily used on my dslr for everyday use if I wish. The Samyang is great but being fully manual it can be a bit limiting at times.

Regarding the star shapes: I removed the stars to process the nebula and then put the stars back having processed them separately, taking care not to over stretch the image. I have to say the corner star shapes are better on the Canon than on the Samyang.

Thanks for the kind comments.

Adrian