Rosette with an Achromat

[astro mick]

Hi Guys.

While,st waiting for my new Triplet scope to arrive I tried my old 120mm Skywatcher Achromat scope and reducer to image the Rosette.

This is just 6x600 secs on the target using H-Alpha and O111 Filters.

I was quite surprised by the result.

Mick.

[Chris]

Crikey Mick, if you were only to do narrow band I don't think you would need the triplet! What a great result

I think Gina had similar results with her ST80 for narrow band. It's food for thought isn't it!

Sooo, which triplet you getting then Mick??

[Bobby1970]

That looks excellent to me. I would be very happy with something like that with a scope that many state isn't suitable for astrophotography and produces massive amounts of CA. 

[Barry-Wilson]

That's an excellent image - tight stars, lovely colour palette & great focus.  Framing draws your eye to the cluster NGC2244 at the centre of the Rosette. A cracker!

[Daniel-K]

That's impressive 

[MartinB]

Absolutely on the button, well done Mick.  Narrow band was made for achromats!.  Lovely processing as well.  

[philj]

Excellent image Mick. Ive been trying to convince folks not to diss achros as not being any good for imaging for years, you've just got to pick the subject and method. This image helps the cause, great stuff

[gorann]

This is just such a stunning image!

I wondered why achromats would not make excellent narrowband instruments, and maybe the success with this image is a bit frustrating since the only thing you would achieve with your new triplet in narrowband imaging is to avoid having to refocus between changing filters. I do not know what triplet you have ordered but maybe you could have got a 7" or 8" achromat for the same price?

[gorann]

PS. What camera did you use? Must be a small ship since with my 5" ED refractor and an APS-C DSLR, I do not get this close to the heart of the rosette

[astro mick]

Thanks everyone,really appreciate the comments.Yes I was well surprised by the performance of this scope,it has certainly thrown an apple in the cart.

Chris,i have plumbed for the TS 80mm F6 Triplet,only got it yesterday,so typically its now cloudy.But will report on how it performs.

Goran,yes your correct,i used an Atik 414ex camera,which does have a small chip size.

Also interesting enough,i did,nt have to refocus between the Narrowband Filters.

This was so simple,put in the reducer,no spacing requirements,focussed and bingo.

I expect a lot of frustration in setting the flattener distance on the Triplet.

Mick.

[laudropb]

Very nice image. Love the detail you've captured.

[gorann]

Yes, flattener distances can be a pain. I have two ES apos, an ED80 and an ED127 with 480 and 950 mm FL, so with the TS 0.79x flattener/reducer I need different spacing (16 and 10 mm). The other night I forgot to change the spacing and spent 3 hours collecting eggy stars.

[Thalestris24]

9 hours ago, astro mick said:

Thanks everyone,really appreciate the comments.Yes I was well surprised by the performance of this scope,it has certainly thrown an apple in the cart.

Chris,i have plumbed for the TS 80mm F6 Triplet,only got it yesterday,so typically its now cloudy.But will report on how it performs.

Goran,yes your correct,i used an Atik 414ex camera,which does have a small chip size.

Also interesting enough,i did,nt have to refocus between the Narrowband Filters.

This was so simple,put in the reducer,no spacing requirements,focussed and bingo.

I expect a lot of frustration in setting the flattener distance on the Triplet.

Mick.

Hi

I bought the same scope in December along with TS 2" flattener and the dslr spacing kit. All fitted together nicely with no fiddling required  

Louise

[ollypenrice]

An eye-opener and food for thought. Anyone wanting to set up a dual rig, for instance, might consider a good apo for the LRGB side but a much cheaper achromat for the Ha and OIII. I started imaging with a Mk1 TeleVue Genesis which was well corrected for visual but not sufficiently corrected to control blue stars in broadband. When I switched to a Tak FSQ I could see no difference whatever in Ha.

This is a super image.

Olly

[PeterCPC]

Lovely image.

Peter

[astro mick]

Thanks all.

Mick.

[Soupy]

That's brilliant... Who needs Apo's when you have narrowband!

[MARS1960]

Wow, that really blew my mind, I was not expecting that, absolutely stunning.

[Martin-Devon]

Lovely image, has a real sense of depth to it, which your framing & processing have certainly helped with.

Martin

[Stardust]

that's excellent  whatever the scope, hmm might try my Tal 100r

[astro mick]

Thanks guys.

Stardust the scope was operating at around F4.5.

Mick.

 

Always worth a try.

[matt-c]

Wow!!! Incredible image well done to you and the scope

[Fay]

What a great unexpected result, love it!

Fay

[Physopto]

Amazing image for the few subs and with the Ha and OIII. I wouldn't have  thought of that. Now it seems obvious. Love the image.

Derek

[matt-c]

I had to come back for a second look amd I've just realised, is this the scope that was for sale on astrobuy? Now I'm really angry at my junk folder