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Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing

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dp297
sage


Reged: 12/14/10

Re: 180mm Nikkor with 52mm step down ring. new [Re: SunBlack]
      #5559422 - 12/07/12 02:41 PM Attachment (21 downloads)

OK....I think that this lens will be my next buy...it is fantastically sharp and there is tons of information in there without chromatic abberation at all...
Here's my rendition of your data....

Edited by dp297 (12/07/12 02:59 PM)


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vmsguy
sage


Reged: 01/09/07

Loc: West Virginia
Re: 180mm Nikkor with 52mm step down ring. new [Re: dp297]
      #5559496 - 12/07/12 03:32 PM


DP,

Would you mind sharing some of your processing steps?

I like the way you brought out the 'filament' details in the
Horsehead area.

When I try to sharpen too much, I get bad artifacts.

I'm pleasantly surprised with the amount of detail using 2 minute exposures at iso800.

Brent


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fco_star
Carpal Tunnel
*****

Reged: 12/13/10

Loc: Texas, Midland
Re: 180mm Nikkor with 52mm step down ring. new [Re: dp297]
      #5559498 - 12/07/12 03:32 PM

Dimitris, I consider the Nikkor 180 one of the best AP lenses, your rendition is great

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dp297
sage


Reged: 12/14/10

Re: 180mm Nikkor with 52mm step down ring. new [Re: fco_star]
      #5559505 - 12/07/12 03:36 PM

Well,
I am using Pixinsight....

here's my rough process...however, your data was so good that the whole thing was a piece of cake...

Pixinsight Image Processing Workflow
LINEAR
1. DSS: Save as 32-bit floating point TIFF
2. Insert TIFF from DSS
3. RGBWS R:G:B 1:1:1
4. STF
5. Dynamic Crop
6. DBE
7. Background Neutralization
8. Color Calibration
9. SCNR
10. Morphological Transformation tools (Morphological Selection) with mask [http://blog.deepskycolors.com/archive/2011/09/08/star-size-reduction-via-Morphological-.html], Make stars of RGB smaller to avoid color halos
11. ATWT small star sharpening
12. GREYCstoration
13. ACDNR for chrominance with mask

NON-LINEAR LUMINANCE
14. Luminance Mask - extract the Luminance channel, and apply a Histo to it to that
gives a strong Luminance Mas k, to protect the dim areas
15. Make stars smaller
16. Deconvolution (Dynamic Point Spread Function Process Generates a Synthetic PSF Image-Use Synthetic PSF Image-Use Deringing Support Image-Use Luminance Mask) [http://www.drakevisual.com/deconvolution]
17. Noise Reduction (MMT- on the first 2 or 3 wavelet layers of the image, to good effect. I mask the image first with the Luminance Clone so that noise reduction is restricted to the background)
18. Mas ked HDRWT - now that the image is no longer linear, HDRWT has 'more range' to work with, and can thus be more effective - applied to Layer 3
19. Mas ked HDRWT #2 - as before, default values , except that it is applied toLayer 4
20. Mas ked HDRWT #3- as before, default values , except that it is applied to Layer 5 (sometimes this is 'too harsh', and I need to decide which two layers to apply HDRWT to – experimentation usually required)
21. Enhance Dark Structures
22. New Luminance Mask - extract a mas k to protect the brightest areas, using Luminance
channel, ATW, Histo, etc - this is not an easy step to define, or explain, and it may even have to be applied earlier in the overall process as well
23. Mas ked HISTO /Lum-CURVE - (this may also have to be done earlier as well) here I would be trying to increase the brightness of the faintest regions , without blowing out brighter regions - this HAS to be 'subtle'
24. Sharpen Luminance




NON-LINEAR CHROMINANCE

25. Sequential MaskedStretch (0.1/0.2/0.3, 200 repeats) with shadows clipping
26. ATW/ACDNR for Chrominance for small scale noise with no mask
27. ATW/ACDNR for Chrominance with lightness mask
28. Masked Sat-CURVE - trying to bring out the colours of the dimmest areas- again, subtlety is important
29. Inverted Masked Sat-CURVE - this time looking at colour in the brighter areas, remembering that over-saturation will look bad
30. SCNR - looking at the whole image, several s mall iterations may be needed to balance out color casts
31. ACDNR#2 - a recheck of ACDNR to make sure that no low-level noise has crept back in

LRGB COMBINATION

32. HISTO adjustment to Luminance and Chrominance
33. CURVES (Contrast enhancement with Curves - protect background with mask)
34. Sharpen (ATW-protect background with mask)
35. Noise Reduction with ACDNR or MMT (invert mask- MMT should be used with a mask to protect the high SNR areas)
36. HDR Multiscale Transform to bring out structure and enhance contrast. MMT should be used with a mask to protect the high SNR areas, and HDRMT with the mask inverted to protect the low SNR areas
37. Multiscale Processing (http://www.astro-imaging.com/Tutorial/PixInsight/M33/en.html)
38. Tone Mapping
39. Reduce size of large stars (MT)
40. HISTO


Edited by dp297 (12/07/12 03:38 PM)


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LeCarl
super member


Reged: 03/16/11

Re: 180mm Nikkor with 52mm step down ring. new [Re: dp297]
      #5560797 - 12/08/12 12:19 PM

Pixinsight seem very powerful! wow! insane treatment! (positively)
how much time this takes?, it seem to have tons of steps, easy or not, name of the process don't help me, remind me nothing! haha!?

I bought my 180mm today, I pay near 230$, not perfect exterior cosmetic, but very clean glasses (important)

To vmsguy : the review is very informative, thanks you to share!!!

I guess, I will like this lens so much, particularly in winter! haha!


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dp297
sage


Reged: 12/14/10

Re: 180mm Nikkor with 52mm step down ring. new [Re: LeCarl]
      #5560801 - 12/08/12 12:22 PM

Dear LeCarl....

I know that the processing steps really do seem intimidating but it is not...
Alternatively, you can use this (http://www.astronomersdoitinthedark.com/dslr_llrgb_tutorial.php)

In any case u need small careful steps...


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fco_star
Carpal Tunnel
*****

Reged: 12/13/10

Loc: Texas, Midland
Re: 180mm Nikkor with 52mm step down ring. new [Re: dp297]
      #5560872 - 12/08/12 01:11 PM

congratulations LeCarl

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dp297
sage


Reged: 12/14/10

Re: 180mm Nikkor with 52mm step down ring. new [Re: fco_star]
      #5560915 - 12/08/12 01:44 PM

I think this has to be the sharpest lens in this category and comparable to the APO lenses from LEICA.
Indeed congrats LeCarl


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bouffetout
scholastic sledgehammer


Reged: 11/21/12

Loc: Canada
Re: 180mm Nikkor with 52mm step down ring. new [Re: SunBlack]
      #5561384 - 12/08/12 07:27 PM

Very nice !

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LeCarl
super member


Reged: 03/16/11

Re: 180mm Nikkor with 52mm step down ring. new [Re: dp297]
      #5561774 - 12/09/12 01:06 AM

Quote:

Dear LeCarl....

I know that the processing steps really do seem intimidating but it is not...
Alternatively, you can use this (http://www.astronomersdoitinthedark.com/dslr_llrgb_tutorial.php)

In any case u need small careful steps...




Sound very interesting! (currently listening)!!!
...but I don't have imagesplus, anyway, someday I will buy pixinsight, as in local forum many people use it,
(I need a bigger (256gb) SSD too... PI need his own system, because PI security dislike the freezed/locked win7, It disable his licences by itself on startup, I locked my windows like in schools or professional computer... this keep away viruses, and stupid software)


****Thanks all for the congrats !

I think the nikkor lens is very good, for the price too!
(I will post something on your thread:
http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/5561031/page...

Edited by LeCarl (12/09/12 01:13 AM)


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Nils_Lars
Postmaster
*****

Reged: 01/04/08

Loc: Santa Cruz Mountains , CA
Re: 180mm Nikkor with 52mm step down ring. new [Re: LeCarl]
      #5561814 - 12/09/12 02:01 AM

Ya this is a fun lens , I love mine

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dp297
sage


Reged: 12/14/10

Re: 180mm Nikkor with 52mm step down ring. new [Re: LeCarl]
      #5561841 - 12/09/12 03:25 AM

Quote:

Quote:

Dear LeCarl....

I know that the processing steps really do seem intimidating but it is not...
Alternatively, you can use this (http://www.astronomersdoitinthedark.com/dslr_llrgb_tutorial.php)

In any case u need small careful steps...




Sound very interesting! (currently listening)!!!
...but I don't have imagesplus, anyway, someday I will buy pixinsight, as in local forum many people use it,
(I need a bigger (256gb) SSD too... PI need his own system, because PI security dislike the freezed/locked win7, It disable his licences by itself on startup, I locked my windows like in schools or professional computer... this keep away viruses, and stupid software)


****Thanks all for the congrats !

I think the nikkor lens is very good, for the price too!
(I will post something on your thread:
http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/5561031/page...




U dont need ImagesPlus for the LLRGB process...u can duplicate the steps in plain Photoshop and use some MaximDL.


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mmalik
Postmaster
*****

Reged: 01/13/12

Loc: USA
Re: 180mm Nikkor with 52mm step down ring. new [Re: vmsguy]
      #5561863 - 12/09/12 04:16 AM Attachment (6 downloads)

My rendering of your TIF:

Processing Workflow: (Instructions here...)
•Crop in ImagesPlus 5.0
•Digital Development in ImagesPlus 5.0
•Multi Point Flatten Background-Planar in ImagesPlus 5.0
•Multiresolution Smooth-Sharpen + Inverse Luminance Mask in ImagesPlus 5.0
•Geometric Transform/Scale (Factor 0.5) in ImagesPlus 5.0
•Adaptive Richardson-Lucy Restoration + Luminance Mask in ImagesPlus 5.0
•Smoothing in ImagesPlus 5.0
•Saturation (Block), and 'Noise Reduction' in Photoshop Extended CS6
•Star Size and Halo Reduction in ImagesPlus 5.0
•Curves, Contrast, Saturation, Sharpen, and 'Noise Reduction' in Photoshop Extended CS6


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