M42 image from Officina Stellare

[avandonk]

This is the latest image from Officina Stellare taken with an RH200

http://www.officinastellare.com/zoom...930/height/410


from here

http://www.officinastellare.com/gallery.php


Bert

[strongmanmike (Michael)]

Happy Days ahead

Mike

[avandonk]

Yes Mike 5:5:5 min RGB and 100min HA is a combination I have to carefully consider. It seems they have used the HA as a luminance to be modulated by the RGB?

Bert

[TrevorW]

Would love to be able to afford its the big brother

Oh well lotto win

[Peter.M]

I wouldn't have thought the dust would show up in a HA image, this is crazy for 5 minutes of RGB though.

[cventer]

The fact that they got so much color form 5:5:5 RGB is pretty darn good.

Cant say I like the image/processing though or composition. I would to see this with more clear luminance as stellar profiles from Ha are naturaly going to be very small.

[atalas]

Oh boy,what a scope!they've actually done a great job on this and If they had some more luminosity in those stars....drool.

[Peter Ward]

I wish you well with this scope Bert, but am I missing seeing the Emperor's clothes here?

Delightfully fast optics for sure, but closer inspection easily reveals stars elongated North/South (see attached)

The colour saturation is extreme.... and quite odd ( eg: the apricot coloured core ) hence I am very surprised that they would use that particular image as an example of their optics.

One would hope a guiding error rather than an optical one is causing the eggy stars.

[alpal]

I really like that M42 picture.
It's got such a wide field from their 24 x 36 mm camera sensor.
I've never seen the dust with that sort of detail before.
The RH 200 would be a nice scope to own.

[LightningNZ (Cam)]

The field is extreme and the amount of detail recorded in such a short time is awesome. That said, the colours a just whacked. Possibly with only 5 mins for each colour it's not enough for decent graduation and so looks completely over the top?

Peter - that's east-west dude. The image has east at top if I'm not mistaken. Certainly north is at the right.

Cheers,
Cam

[Peter Ward]

Originally Posted by LightningNZ

Peter - that's east-west dude. ........
Cheers,
Cam

No worries Bro.

I was referring to the image aspect......not the sky.

[avandonk]

You are quite correct Peter. It looks like a bit of backlash in the DEC axis. I agree the colour is a bit cartoony.

I upsized the image and adjusted it to something more realistic.

Here 3 MB

http://d1355990.i49.quadrahosting.co...2_RH200col.jpg


Here is the red channel with the HA I presume. 5MB

http://d1355990.i49.quadrahosting.co..._RH200_red.jpg

The stars look far better than either blue or green.

Bert

[Peter Ward]

Originally Posted by avandonk

I upsized the image and adjusted it to something more realistic.

Bert

I'm still not seeing the Armani suit Bert

At that focal length, accurate guiding should be a trivial exercise.

I'd put it down to focal plane tilt. F3.0 is *so* terse with any misalignment. (making me worry about the F3.8 RHA incarnation)

Interesting none-the-less.

[avandonk]

Here is an enhanced version using EasyHDR. 4 MB

http://d1355990.i49.quadrahosting.co..._RH200_HDR.jpg


I am looking foward to see what I can do with a 16 bit camera and multiple exposures to record the full dynamic range of some difficult objects.


Bert

[RobF (Rob)]

How long before you've assembled all the pieces of your new weapon of mass destruction now Bert?

[avandonk]

Originally Posted by RobF

How long before you've assembled all the pieces of your new weapon of mass destruction now Bert?

Rob I have the camera, filter wheel and filters. The RH200 with Atlas focuser should arrive within a week or so. The PMX mount is still months away. I will most probably set up on the trusty EQ6 for the time being and try to get up to speed with all the new complexities, both the known and unknown.

Should keep me out of trouble for a while.

Bert

[avandonk]

Originally Posted by Peter Ward

I'm still not seeing the Armani suit Bert

At that focal length, accurate guiding should be a trivial exercise.

I'd put it down to focal plane tilt. F3.0 is *so* terse with any misalignment. (making me worry about the F3.8 RHA incarnation)

Interesting none-the-less.

If it was tilt Peter the elongation would vary in the direction of tilt. At some point there would be a line of no elongation orthogonal to the tilt. It looks like DEC backlash or overcorrection to me. It could also be slight creeping flexure as that is roughly the direction it would occur depends on the latitude of course..

Bert

[marco (Marco Lorenzi)]

Originally Posted by avandonk

Yes Mike 5:5:5 min RGB and 100min HA is a combination I have to carefully consider.

Not quite correct Bert. From the photographer's website:

"This is a new image from the OS Veloce RH200. The image was taken by my friend Giovanni Dal Lago and it is a 100min Ha (bin2x2) + 5:5:5 RGB (bin3x3). I then added about 100min of LRGB (bin1x1) taken with the RH200 some months ago in Austria at Sattlegger.
The colur datas was still not enough for the faint parts so a little contrinution (20%) from my old M42 area image was used to add deepness and richer color contrast (that's why very faint spikes can be seen on the most luminous stars). The overall softness and haloes on bright parts are only due to the color component." (http://www.flickr.com/photos/astrojo...in/photostream)

So this is a total of 100m+5m+5m+5m+100m+20%(?) of 6 hours of a collage taken with telescopes up to 14.5 inches of diameter (here the link http://www.flickr.com/photos/astrojo...in/photostream). If the 20% is correct (but I imagine not easy to evaluate its effective contribution) we are talking of more than 3.5 hours of HaLRGB data @ f/3 plus about 1.5 hours of the collage.

The final image to me is quite pretty but we are not talking about little light integration for a very fast instrument. A more realistic evaluation will be done by you as you have the OTA in your hand and with the processing from the original unstretched fits..

Clear skies
Marco

[avandonk]

Originally Posted by marco

Not quite correct Bert. From the photographer's website:

"This is a new image from the OS Veloce RH200. The image was taken by my friend Giovanni Dal Lago and it is a 100min Ha (bin2x2) + 5:5:5 RGB (bin3x3). I then added about 100min of LRGB (bin1x1) taken with the RH200 some months ago in Austria at Sattlegger.
The colur datas was still not enough for the faint parts so a little contrinution (20%) from my old M42 area image was used to add deepness and richer color contrast (that's why very faint spikes can be seen on the most luminous stars). The overall softness and haloes on bright parts are only due to the color component." (http://www.flickr.com/photos/astrojo...in/photostream)

So this is a total of 100m+5m+5m+5m+100m+20%(?) of 6 hours of a collage taken with telescopes up to 14.5 inches of diameter (here the link http://www.flickr.com/photos/astrojo...in/photostream). If the 20% is correct (but I imagine not easy to evaluate its effective contribution) we are talking of more than 3.5 hours of HaLRGB data @ f/3 plus about 1.5 hours of the collage.

The final image to me is quite pretty but we are not talking about little light integration for a very fast instrument. A more realistic evaluation will be done by you as you have the OTA in your hand and with the processing from the original unstretched fits..

Clear skies
Marco

So why put this up as an RH200 image? It just demeans any credibility of the capability of the RH200. To then even quote 5 minute exposures is just meaningless when you say there is 3.5 hours of data at f3. On top of this data from longer slower scopes were used for what star definition?


I am sure that I will be very happy with the performance of the RH200. My first simple evaluation was how the hell is the dust so clear with 5:5:5 minutes of RGB and 100 minutes of HA?

Thanks for the heads up.

Only time will tell what this optic can do in my hands.

By the way are all the other RH200 images really done with an RH200 or are they hybrids like this one?

Bert

[gregbradley]

A very nice image but rather dishonest/deceptive of Officina Stellare to claim the image when the contribution from their scope is only some colour. Nevertheless Bert I am sure the scope will be amazing.

Tom Davis has often used 2 scopes with a fast widefield scope adding colour. Its a good technique and one I intend using with 2 setups going at once to maximise clear night imaging productivity.

Greg.