Rho Ophiuchi in 135mm (3 x firsts)

[CoolhandJo (Paul)]

This represents a few firsts for me. First time used my HEq5 after belt modding it (cut my RMS error by almost 50%). First time imaged this target - used Samyang 135mm at F2.4. First time I didn't use a LP filter (I realized my east to Zenith targets sit in bortle 4!). This is 107 x 240sec RGB using ASI 533 MC pro with Svbony UV/IR (about 7 hours). I wasn't happy with the lack of Red in the image so I added 44 x 240 sec Ha (zwo 7nm) (about 3 hours). Processed in Pixinsight and Photoshop.

Astrobin https://astrob.in/byogc1/B/

[PKay (Peter)]

Where on the same page Paul.

Lovely image

[Nikolas (Nik)]

Awesome capture mate

[multiweb (Marc)]

Gorgeous fov Paul. One for the cool wall.

[CoolhandJo (Paul)]

Originally Posted by multiweb

Gorgeous fov Paul. One for the cool wall.

Thanks Marc

Originally Posted by Nikolas

Awesome capture mate

Thanks Nikolas

Originally Posted by PKay

Where on the same page Paul.

Lovely image

Thanks PK

[AstroViking (Steve)]

Beautiful. Absolutely beautiful.

[CoolhandJo (Paul)]

Originally Posted by AstroViking

Beautiful. Absolutely beautiful.

Thanks. It's a nice target to view

[Dave882 (David)]

Wonderful shot full of beautiful colour -and excellent framing too! Well done!!

[strongmanmike (Michael)]

A fine looking well processed Rho there Paul, colours are lovely, very nice job

Mike

[RyanJones]

One of the skies most beautiful regions. Lovely image 👍

[AdamJL]

Excellent work. I love the aperture diffraction spikes as well. Looks like you've got a very sharp version of that lens.
What did you use for autofocus? Or was it all manual?

[JA]

It looks wonderful Paul
I've been itching to dig out a 135 for a similar job, when we eventually get to see the night sky

Best
JA

[CoolhandJo (Paul)]

Originally Posted by JA

It looks wonderful Paul
I've been itching to dig out a 135 for a similar job, when we eventually get to see the night sky

Best
JA

thanks JA - the 135 has a special place in my set up - but your right - need an excuse to drag it out as the FOV requires large targets.

Originally Posted by AdamJL

Excellent work. I love the aperture diffraction spikes as well. Looks like you've got a very sharp version of that lens.
What did you use for autofocus? Or was it all manual?

Thanks Adam - yeah I know the Quality Control on these can sometimes mean they are not as sharp as others - I got lucky I guess. This is manual focus - using a B Mask at first run only - no intermediate check.

Originally Posted by RyanJones

One of the skies most beautiful regions. Lovely image 👍

Thanks Ryan - I cant think of a region that has so much colour and dust in contrast like that TBH

Originally Posted by strongmanmike

A fine looking well processed Rho there Paul, colours are lovely, very nice job

Mike

Thanks mike !

Originally Posted by Dave882

Wonderful shot full of beautiful colour -and excellent framing too! Well done!!

Thanks Dave! I find the ASI AIR Pro dithers pretty good to keep most of it in the FOV so only have to crop edges.

[Retrograde (Pete)]

Great work Paul.

[CoolhandJo (Paul)]

Originally Posted by Retrograde

Great work Paul.

Thanks Pete

[gregbradley]

A superb Rho Paul. I think this is a good focal length for this object as its really quite broad.

I have that lens as well and yet to use it. I think that is a good use of it. This and the Orion complex.

Greg.

[Ryderscope (Rodney)]

That’s an excellent result Paul. Scanning through the image shows a nice flat field with great colours

[CoolhandJo (Paul)]

Originally Posted by gregbradley

A superb Rho Paul. I think this is a good focal length for this object as its really quite broad.


I have that lens as well and yet to use it. I think that is a good use of it. This and the Orion complex.

Greg.

Thanks Greg - yes I do remember you mentioned having the same lens. The other good use is the super nova remnants regions

[CoolhandJo (Paul)]

Originally Posted by Ryderscope

That’s an excellent result Paul. Scanning through the image shows a nice flat field with great colours

Thanks Rodney - I stopped the lens to 2.4 F ratio and I find it gives the best field.

[willik (Willik)]

Beut image Paul well done.