Problems with Samyang 8 mm NO PARALAX point  

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Octavias
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Problems with Samyang 8 mm NO PARALAX point

by Octavias » Tue Jun 18, 2013 4:07 pm

Good day all,

In the past few months I have been punishing myself to perfect my shooting technique and stitching process. I have made successful attempts in finding the NO PARALAX POINT for my lens which is the (Samyang 8 mm f3.5 fisheye CS lens) and the guide i fillow is this one:michel.thoby.free.fr/SAMYANG/Early%20test%20repor...

But i am still not getting the PERFECT stitch. My problem is I don't' understand if I still need t work on the actually pupil entrance or is there a problem somewhere else. SO i have been working more on it and moving it back and forward and doing tests.

In the result i found out that my zenith causes problems now. Let me explain.

I shoot 6 shots at 60 degrees each and right after i point my camera up and shoot a zenith, then down and do 2 nadir shots and one handheld/ or tripod shot of the area.

The 6 shots, when stitched are PERFECT. but as soon as I add the Zenith or the Nadir, i get aberrations and Paralax.

Please advise what I should be doing since I think I am going in circles.

Could it also be that I am too close to my subjects? Because when i am doing testing in my room its small and i ALWAYS get errors.


Thank you so much for all you advise in advance.

Also you can contact me directly at

maxb@acmbphotography.com


-Max
"The whole point of taking pictures is so that you don’t have to explain things with words."
http://www.acmbphotography.com/ - website
https://www.facebook.com/ACMBPhotography - facebook
https://www.facebook.com/MaxBolotovPhotography

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HansKeesom
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by HansKeesom » Tue Jun 18, 2013 6:50 pm

What when you stitch the 6 shot plus zenith? So without nadir?
Regards, Hans Keesom
I stitch and render for other photographers. Price: 25 euro or less, no cure no pay. If you want to concentrate on your business let me do the stitching for you. Free TB of Dropbox space when you have more then 250 euro business a year.

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Artisan S.
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by Artisan S. » Thu Jun 27, 2013 11:18 am

Or if you stitch all 8 shots using PTGui......try it much more efficient for VR spheres.

Greets, Ed
Fear leads to anger, anger leads to hate, hate leads to... suffering (c) Yoda.....

Olympus OM-D with HLD-6, Fuji GX680, Samyang 7.5, Olympus 9-18, Sigma 19, Panasonic 14-45, Nikon 50 1.4 on Novoflex with tripod mount, Nikon 80-200, Panasonic 45-200, Fujinon 135, Fujinon 80, Fujinon 65, Fujinon 50, Gitzo Gilux Reporter 2, Sirui Ballhead and Panosaurus 2.0 NNP adapter, Arduino Uno.

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Artisan S.
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by Artisan S. » Fri Jun 28, 2013 9:08 pm

Octavias has disappeared into a cloud of logic Hans.....but I can say for sure that some FE have no true NPP....because the NPP is dependent on the direction of entrence of the lightrays as can be demonstrated using a laser pointer. I don't think the Samyang 8 has such a charisteristic:

http://www.hugha.co.uk/NodalPoint/Index.htm#Samyang%208mm

As you see the Gold ring is verry close to the Nodal point of the Samyang.

Greets, Ed.
Fear leads to anger, anger leads to hate, hate leads to... suffering (c) Yoda.....

Olympus OM-D with HLD-6, Fuji GX680, Samyang 7.5, Olympus 9-18, Sigma 19, Panasonic 14-45, Nikon 50 1.4 on Novoflex with tripod mount, Nikon 80-200, Panasonic 45-200, Fujinon 135, Fujinon 80, Fujinon 65, Fujinon 50, Gitzo Gilux Reporter 2, Sirui Ballhead and Panosaurus 2.0 NNP adapter, Arduino Uno.


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