rosette neb in 7nm hydrogen alpha

[tornado33]

I used the mighty 300mm f2.8 flourite lens from Bert tonight to get the Rosette neb.
12x5 mins ISO 1600
300mm f2.8
Modded 350D
Idas uv/ir and Baader 7Nm Ha filters
Processed in Iris, only red channel used
Scott
PS Im off to visit relos in Gloucester 4 the weekend, no net access or imaging till I get back on Sunday pm

[iceman (Mike)]

Wow that's stunning. Did you crop that? I'm wondering how big it is.

I'd love to see a H-a/RGB composite.

Where is it located?

[leon]

Yep, that sure is a beauty well done, those 300mm lenses surely live up to their reputation. Mike the rosette is in the constellation of Monoceros

Leon

[Garyh]

Now thats very nice Scott
To bad you can`t take the scope up this way with you to darker skies.
cheers Gary

[Ric]

That's a beauty Scott, wonderful details and the image is very sharp.

Cheers

[h0ughy (David)]

very sharp image Scott - is that using the new improved Scott Alder semi automated computer controlled focus motor or did you do this one by eye and the usual back of the camera guess. Fine work laddy, fine work indeed

[seeker372011 (Narayan)]

very very nice

How do you focus?

oops I just noticed Houghy asked the same question..xpressed slightly differently

[EzyStyles (Eric)]

stunning shot scott. you seem to take every opportunity you can get, when full moon do HA shots.

[tornado33]

Thanks all, Im back from my weekend away.
Its not cropped, its full frame.
I now focus by connecting camera usb cable to laptop and taking short 10 sec images @ISO1600, in large jpeg, using the canon remmote capture app. When the pic comes up on the laptop I zoom right in (way better then looking on back of camera, then move lens focuser 1mm or less one way, then try again, if stars bigger I go 2mm the opposite way, if smaller I move another mm same way until they are as small as possible. What works well is that Baader have optomised their HA filter for faster systems, so it probably performs better in the 300mm F2.8 lens than say, an Astrodon or Custom Scientific filter.

Even on each sub as it was taken it looked brilliant, blood red nebulosity extending out. Its xtra contrasty as there was in fact no moon up at the time, it had only started rising after Id finished.

In a finder the rosette is found by locating the star cluster at its centre. you wont see any nebulosity unless youre at a very dark site or with a nebula filter
Scott

[acropolite (Phil)]

Breathtaking image, IMO no need for colour, I like it just the way it is.