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Life on the Edge
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leonardturner



Joined: 14 Mar 2013
Posts: 421
Location: Atlanta, GA, USA

PostPosted: Fri Mar 23, 2018 4:29 am    Post subject: Life on the Edge Reply with quote

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Saul



Joined: 31 Jan 2011
Posts: 1176
Location: Naperville, IL USA

PostPosted: Fri Mar 23, 2018 9:20 am    Post subject: Reply with quote

Splendid. Please share tech details
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Saul
Studio, horizontal and field setups
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leonardturner



Joined: 14 Mar 2013
Posts: 421
Location: Atlanta, GA, USA

PostPosted: Fri Mar 23, 2018 1:00 pm    Post subject: Reply with quote

Thank you, Saul. It was done with a reversed El-Nikkor 50 mm f2.8, stack of 230 images, about 2.5X on full-frame (Nikon 810) sensor, with a little crop. LED lighting with homemade diffuser.

Do you know what it is?

Leonard
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 19180
Location: Richland, Washington State, USA

PostPosted: Fri Mar 23, 2018 2:26 pm    Post subject: Reply with quote

I'm guessing the edge of daffodil petals.

--Rik
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Saul



Joined: 31 Jan 2011
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Location: Naperville, IL USA

PostPosted: Fri Mar 23, 2018 2:26 pm    Post subject: Reply with quote

No idea, but it is very nice and needs stereo version Wink
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Saul
Studio, horizontal and field setups
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razashaikh



Joined: 14 Nov 2017
Posts: 124
Location: India

PostPosted: Fri Mar 23, 2018 9:39 pm    Post subject: Reply with quote

Yea I have also no idea, still a great shot though.
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svalley



Joined: 03 Dec 2006
Posts: 293
Location: Albany, Oregon

PostPosted: Sat Mar 24, 2018 1:19 pm    Post subject: Reply with quote

Sweet shot! Well done.

Steve
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leonardturner



Joined: 14 Mar 2013
Posts: 421
Location: Atlanta, GA, USA

PostPosted: Sat Mar 24, 2018 1:59 pm    Post subject: Reply with quote

My thanks to all of you for your kind words.
Saul, you inspired me to do my first stereo ever. It worked, sort of, but it's not of posting quality. The original image was cropped and rotated after stacking, and I haven't been able to figure out how to do that with a stereo pair. Maybe next time--sorry.
And Rik, you nailed the id. Good eye!

Leonard
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Saul



Joined: 31 Jan 2011
Posts: 1176
Location: Naperville, IL USA

PostPosted: Sat Mar 24, 2018 2:19 pm    Post subject: Reply with quote

leonardturner wrote:
...It worked, sort of, but it's not of posting quality. The original image was cropped and rotated after stacking, and I haven't been able to figure out how to do that with a stereo pair. Maybe next time--sorry...


You can use http://stereo.jpn.org/eng/stphmkr/ with your stacked/edited photos. Post that stereo Wink we all are learning here Smile, nobody is perfect ...
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Saul
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rjlittlefield
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Joined: 01 Aug 2006
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Location: Richland, Washington State, USA

PostPosted: Sat Mar 24, 2018 2:35 pm    Post subject: Reply with quote

leonardturner wrote:
And Rik, you nailed the id.

I had help from Mother Nature. There happens to be a bed of daffodils in bloom right outside my window. The similarity would have been difficult to miss!

Quote:
The original image was cropped and rotated after stacking, and I haven't been able to figure out how to do that with a stereo pair.

Making stereo with intention to rotate can be done in Zerene Stacker, but it requires some care.

The formally correct approach is to specify both X- and Y-shifts in the Preferences > Stereo/Rocking panel, using values such that rotating the results into final orientation will bring the Y-shifts to zero, or at least close enough that StereoPhoto Maker or moving the views in Photoshop can finish the job to give a good result.

Unfortunately the exact number depends on the frame aspect ratio as well as the intended rotation angle, so it's not trivial to calculate. As I type this, I think the appropriate computation would be that Y-shift % should be X-shift % multiplied by (X-size/Y-size) * tan(theta) for a rotation angle theta and X-size and Y-size being the image size in pixels. But I haven't checked that.

When experimenting with stereo, it helps to use Preferences > Preprocessing to pre-size the images small and stack every N'th frame with fairly large N, so as to keep the processing time short.

--Rik
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leonardturner



Joined: 14 Mar 2013
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Location: Atlanta, GA, USA

PostPosted: Sun Mar 25, 2018 5:06 am    Post subject: Reply with quote

OK, Saul, this one's for you--you pushed me into it. Not exactly a finished product, and certainly not a replication in stereo of the earlier image, but its what I could do at this stage. Rotation and cropping were done of images simultaneously in Bridge, and they were retouched individually.

Rik, thanks for your information and input on this. I'm afraid my facility for trig has fallen off a bit over the decades! These were stacked "straight" and manipulated as above, giving only partial control of rotation. Nevertheless, a fun project.

Leonard

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Sumguy01



Joined: 28 Jan 2013
Posts: 1119
Location: Ketchikan Alaska USA

PostPosted: Sun Mar 25, 2018 8:06 am    Post subject: Reply with quote

Very nice.
Excellent stereo.
Thanks for sharing.
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 19180
Location: Richland, Washington State, USA

PostPosted: Sun Mar 25, 2018 10:58 am    Post subject: Reply with quote

Nice work!

This is good stereo, excellent really for such a challenging first attempt.

Judging from the artifacts that I see, these were rendered with PMax. That is always the first thing that I do too, but with subjects like this you'll get a better final result if most of the image comes from DMap. That's because when the stereo shifts are involved, PMax tends to produce brightness and contrast that does not match between the two views. For example in the pair shown here, the image on the right side has a brighter and more contrasty left edge on the petal. Using DMap, both views would be faithful to the original source images, so they would also match each other.

I hope this helps!

--Rik
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Saul



Joined: 31 Jan 2011
Posts: 1176
Location: Naperville, IL USA

PostPosted: Sun Mar 25, 2018 11:10 am    Post subject: Reply with quote

leonardturner wrote:
OK, Saul, this one's for you--you pushed me into it...


Hi Leonard,
Great stereo, do not try to tell me that you are not satisfied with your result Wink
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Saul
Studio, horizontal and field setups
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leonardturner



Joined: 14 Mar 2013
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Location: Atlanta, GA, USA

PostPosted: Mon Mar 26, 2018 4:36 am    Post subject: Reply with quote

Thanks to all, and I very much appreciate the useful tips, Rik and Saul.

Leonard
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