Vela SNR in 3nm NII and OIII blended with RGB

[avandonk]

Compared to facing the threat of bushfires, 40C days and 30C nights are really only a minor annoyance. When temperature controlled optics are hotter than their set temperature trying to collect any data is a waste of time.

Things did cool down and I managed to get a decent RGB data set of a bit of the Vela Supernova Remnant. I have added the NB data to this RGB.

It is not a final as I am sure I have not got it as good as the information the data contains. My processing skills may/will improve with practice.

Large full sensor resolution image 10MB

http://d1355990.i49.quadrahosting.co...R_RGB+NB_N.jpg

The RH200 actually has better resolution with good seeing than the 9 micron pixels of the sensor of the PL16803 camera. With dithering and multiple exposures and stacking upsized this can be recovered. The deep well depth is far more important than going for smaller pixels.

All the data was stacked at X1.5 times the pixel size of the PL16803. This 6000x6000 pixel image shows far better resolution than any single native size image. 20MB

http://d1355990.i49.quadrahosting.co...R_RGB+NB_1.jpg

Bert

[RobF (Rob)]

Keep them coming please Bert. Really enjoying following your RH200 adventure!

[Larryp (Laurie)]

Magnificent, Bert!

[LightningNZ (Cam)]

As always that's awesome work Bert. Would you mind sharing the components of your processing software stack? Do you use DSS or something fancier?

Cheers,
Cam

[strongmanmike (Michael)]

I agree with Rob, great to see these wide deep shots of Vela with that magnificent scope of yours 30degC+ nights aren't much fun, even with a ProLoine

Mike

[venus (Lydia)]

"Magnificent" is correct I've never seen the veil this good...great work!

[Ross G]

Great photo Bert.

Again, such amazing detail.

I agree with Rob as to how interesting and informative it has been following your adventure with the new eauipment.

Thanks.

Ross.

[avandonk]

Originally Posted by RobF

Keep them coming please Bert. Really enjoying following your RH200 adventure!

Originally Posted by Larryp

Magnificent, Bert!

I will keep them coming. There is no point in only producing images to be kept hidden.

Bert

[avandonk]

Originally Posted by LightningNZ

As always that's awesome work Bert. Would you mind sharing the components of your processing software stack? Do you use DSS or something fancier?

Cheers,
Cam

I use ImagesPlus for initial correction for darks and flats. I stack with either RegiStar or DSS or both and compare, depending on the number of frames. All this is done unstretched.

To get RGB or NB individual stacked frames in register I use RegiStar to excise and register the common areas.

I stretch faint stuff differently to bright stuff. The main thing is to not lose real data at either the dim or bright end of the histogram.

The stretched image is balanced carefully for colour in PS. This is important as I use EasyHDR to tone map the data to the final sixteen bit tiff that is used in PS to produce the eight bit image or jpg that you see here.

Most of this I worked out myself. I prefer to fly myself than use an autopilot.

It quite easy to enhance a small field of view to show maximum detail. With widefields the dynamic range is always far greater than any one small area of detail.

Bert

[avandonk]

Originally Posted by strongmanmike

I agree with Rob, great to see these wide deep shots of Vela with that magnificent scope of yours 30degC+ nights aren't much fun, even with a ProLoine

Mike

When all the image train is still at 32C when ambient is down to 29C and very slowly falling even a Proline can only get to -25C. Even then there was no point as focus was very far out and changing.

Yep ye canna beat wide and deep shots with very good resolution!

Bert

[avandonk]

Originally Posted by venus

"Magnificent" is correct I've never seen the veil this good...great work!

Originally Posted by Ross G

Great photo Bert.

Again, such amazing detail.

I agree with Rob as to how interesting and informative it has been following your adventure with the new eauipment.

Thanks.

Ross.

There were three main reasons I bought this system. The SMC, the LMC and the Vela SNR. I could spend the rest of my life on only these three objects and still not have it perfect! For now I will settle for as good as it gets.

Bert

[avandonk]

For interest this is the RGB data 10MB

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


As you can see that dim stuff takes a lot of getting!


Bert

[avandonk]

The real take home message is after a lot of RGB and NB images I did not have to worry about coloured haloes due to spectral aberrations or filter deficiencies.

The Astrodon LRGB filters do not need any focus adjustment. The NB do need a bit but at F3 it is critical as the critical focus zone is so tight.

Only more data will marginally improve this image.

Bert

[h0ughy (David)]

like what you got - a real eyeopener

[avandonk]

Originally Posted by h0ughy

like what you got - a real eyeopener

Thanks h0ughy, I hope there are many more to come.

Bert

[Peter Ward]

Bert, it's been great seeing your journey with fast wide field optics and CCD acreage but....

.... I'd suggest you don't push the data so hard..to the point it looks like Tech Pan 2415?

Martin (Pugh) does this sublimely....crafty bugger...but I have no idea how he does it.

anyway I digress... Smooth the data a little: shadows and highlights should show a gradual transition and structure rather than a stark contrast.

Just my 2 cents worth

[dvj (John)]

Look for a review in Sky & Telescope from Dennis Di Cicco about his experiences with the RH200. His Proline 16803 images look pretty good.

[dvj (John)]

Originally Posted by avandonk

Compared to facing the threat of bushfires, 40C days and 30C nights are really only a minor annoyance. When temperature controlled optics are hotter than their set temperature trying to collect any data is a waste of time.

Things did cool down and I managed to get a decent RGB data set of a bit of the Vela Supernova Remnant. I have added the NB data to this RGB.

It is not a final as I am sure I have not got it as good as the information the data contains. My processing skills may/will improve with practice.

Large full sensor resolution image 10MB

http://d1355990.i49.quadrahosting.co...R_RGB+NB_N.jpg

The RH200 actually has better resolution with good seeing than the 9 micron pixels of the sensor of the PL16803 camera. With dithering and multiple exposures and stacking upsized this can be recovered. The deep well depth is far more important than going for smaller pixels.

All the data was stacked at X1.5 times the pixel size of the PL16803. This 6000x6000 pixel image shows far better resolution than any single native size image. 20MB

http://d1355990.i49.quadrahosting.co...R_RGB+NB_1.jpg

Bert

Bert, I'm scratching my head on this one. I don't see how you can achieve better resolution by dithering and simply upscaling your images. It is indeed a bigger image, and dithering eliminates continuous pattern noise as well as other artifacts, but improvement to arcseond per pixel resolution is news to me. Can you explain what you have done in detail?
It would seem like a technique that anyone could apply to their images.

j

[Poita (Peter)]

I'm assuming he is using a super-resolution technique utilising sub pixel shifts in multiple images.
We do it for feature film reconstruction when negatives are lost. I imagine you could do the same for astro images.
I'd like to know which software though.

http://users.soe.ucsc.edu/~milanfar/...al/SRfinal.pdf

[Peter Ward]

Originally Posted by dvj

Bert, I'm scratching my head on this one.

j

Ditto. I re-sized & layered the two examples in Photoshop.

Switching between the layers, the images look identical: re-scaling data simply doesn't improve resolution.