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Two scales and two different type of lighting techniques

 
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JH



Joined: 09 Mar 2013
Posts: 808
Location: Vallentuna, Stockholm, Sweden

PostPosted: Sun Jul 19, 2015 3:13 pm    Post subject: Two scales and two different type of lighting techniques Reply with quote

This is two scales that are up side down. I tried two different type of lighting techniques. The first one - that I like best in this case - is EPI light polarized so that the reflections are enhanced (the opposite of cross polarization). The second is light through the barrel of the objective.

255 pictures, 0,00055 mm stepsize, Nikon BD plan apo 40x NA 0.80, Canon 6D, removed sensor dust in Adobe LR, stacked with Zerene Stacker - mixed PMax and DMap. Before retouching from PMax to DMap I used the camera raw filter in Adobe PS to take care of the noise in the PMax file. Post processing identical for both pictures; smart sharpening, unsharp mask and curves in Adobe PS, no local adjustments.

Comments are wellcome

Regards
Jörgen



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rjlittlefield
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Joined: 01 Aug 2006
Posts: 17614
Location: Richland, Washington State, USA

PostPosted: Sun Jul 19, 2015 3:34 pm    Post subject: Reply with quote

Very nice images!

One question about workflow: do you have a reference for the procedure that you used to remove sensor dust in Adobe LR?

--Rik
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JH



Joined: 09 Mar 2013
Posts: 808
Location: Vallentuna, Stockholm, Sweden

PostPosted: Sun Jul 19, 2015 4:24 pm    Post subject: Reply with quote

rjlittlefield wrote:
Very nice images!

One question about workflow: do you have a reference for the procedure that you used to remove sensor dust in Adobe LR?

--Rik


Hi Rik

Thanks!

I use the "Q" tool.



In this case I went through all dots in the first and the last picture in the first stack. I passed this information to all pictures in this stack and in the second stack. I checked the second stack and found some dots that was still there and corrected those.

If I have a grey out of focus WB picture I use that one instead.

The trail from missed dots are easy to spot when the stacking starts, If I missed some dots I usually go back and remove them.

In this case I turned off all alignments so for a PMax only picture I could have done all dedusting afterwards - wich probably is better because I do not think that the dedusting in Adobe LR is foolproof. But I wanted to use DMap and dust tends to create round islands.

To minimize noise I do not do any sharpening in Adobe LR before stacking.

Regards

Jörgen
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 17614
Location: Richland, Washington State, USA

PostPosted: Sun Jul 19, 2015 8:22 pm    Post subject: Reply with quote

Thanks for the writeup. I was concerned for a moment because your screenshot shows a Swedish version of Lightroom. But it happens that the tool is called "Spot Removal (Q)" in the English version also.

I see that its use is described in some detail at http://digital-photography-school.com/how-to-remove-sensor-dust-with-lightroom/. That writeup seems consistent with what you've described, as far as I can tell, but let me know if there's something that I've missed.

--Rik
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zzffnn



Joined: 22 May 2014
Posts: 1223
Location: Texas USA

PostPosted: Sun Jul 19, 2015 8:52 pm    Post subject: Reply with quote

Beautiful!!
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JH



Joined: 09 Mar 2013
Posts: 808
Location: Vallentuna, Stockholm, Sweden

PostPosted: Mon Jul 20, 2015 1:43 am    Post subject: Reply with quote

Thanks zzffnn!

rjlittlefield wrote:
Thanks for the writeup. I was concerned for a moment because your screenshot shows a Swedish version of Lightroom. But it happens that the tool is called "Spot Removal (Q)" in the English version also.

I see that its use is described in some detail at http://digital-photography-school.com/how-to-remove-sensor-dust-with-lightroom/. That writeup seems consistent with what you've described, as far as I can tell, but let me know if there's something that I've missed.

--Rik


Hi Rik

You could add the obvious that it is important to use a large magnification, 4:1 or something similar. When doing this the easiest way to go through the entire picture is to start in a corner and then use the page up/page down buttons.

If you use an out of focus picture - like the first or the last in a stack or an out of focus picture of a gray card (which is good to have for WB anyway) - you get a lot of help by checking the box ("Visa fläckar" in Swedish which translates to "Show dust" or something similar) in the down left corner and adjust the slider so you only see dust.





Regards
Jörgen


Last edited by JH on Tue Jul 21, 2015 9:03 am; edited 1 time in total
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JH



Joined: 09 Mar 2013
Posts: 808
Location: Vallentuna, Stockholm, Sweden

PostPosted: Mon Jul 20, 2015 3:26 am    Post subject: Reply with quote

This is a more finalized picture with some local adjustments and dust removal from the subject.
Regards Jörgen

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Jacek



Joined: 02 Oct 2011
Posts: 4341
Location: Poland

PostPosted: Tue Jul 21, 2015 8:19 am    Post subject: Reply with quote

good job, very nice
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JH



Joined: 09 Mar 2013
Posts: 808
Location: Vallentuna, Stockholm, Sweden

PostPosted: Thu Jul 23, 2015 1:53 am    Post subject: Reply with quote

Thanks Jacek Very Happy
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Marek Mis



Joined: 10 Jul 2010
Posts: 2244
Location: Suwalki, Poland

PostPosted: Thu Jul 23, 2015 5:30 am    Post subject: Reply with quote

Very nice and interesting images ! The last one is super !

Marek
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pwnell



Joined: 18 Dec 2009
Posts: 1888
Location: Tsawwassen, Canada

PostPosted: Thu Jul 23, 2015 11:26 am    Post subject: Reply with quote

I like the saturation of the second version of the first image the most, but I feel it has been oversharpened in the second iteration (perhaps sharpened twice - second time for export?)
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JH



Joined: 09 Mar 2013
Posts: 808
Location: Vallentuna, Stockholm, Sweden

PostPosted: Fri Jul 24, 2015 10:09 am    Post subject: Reply with quote

Thanks for the comments Marek Mis and Pwnell!

Pwnell, I increased the contrast and darkness in the areas with "haze". Did a general curves adjustment and exported with some standard sharpeing.

I think it mostly is the curves adjustment that make the pictures look sharper than the first one.

This is an interesting and a tricky picture to post process - very hard light, a lot of false collours and empty magnification.

More comments are welcome.

Regards
Jörgen
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