Thanks for that hint! A second look at
<http://michel.thoby.free.fr/SAMYANG/Early%20test%20report.html> shows
me that Michel Thoby actually pointed to the fact that both the 'Samyang
8mm 1:3.5 FISH-EYE CS' and the 'Opteka 6.5mm 1:3.5 FISH-EYE CS' are
identical products.
Though there is a difference: the Opteka lens
(<http://opteka.com/opt65ii.aspx>) comes with a detachable lens hood
(sun shield) while the Samyang has a fixed one:
<http://michel.thoby.free.fr/SAMYANG/Samyang_shaved.jpg>
<http://i1186.photobucket.com/albums/z374/dmc1965/newalbum/65_II_ALT1.jpg>
I really love these marketing heroes... did you know that Mercedes will
sell the Renault Kangoo soon, just with a big star added?
Carl
Emad ud din Bhatt schrieb am 19.04.12 14:25:
Thanks all for your support.
I feel Optika and Samyang both are same with different brand names.
These lenses are sold with different bran names.
I will try to create equirects this weekend....
On Thu, Apr 19, 2012 at 12:58 PM, kfj wrote:
I use the Samyang a lot on my 450D. The closest projection type is
stereographic, and if you use that, the lens correction coefficients
you need are smallest. Here's a values from a typical lens.ini file
for it:
[Lens]
image_width=4272
image_height=2848
type=10
hfov=138.025
crop=1.6
a=0.00716497
b=-0.0360894
These settings probably won't be correct for you, as you use a
different body, but the lens correction coefficientsshould be similar
and the projection type is the same. But you can take it from there.
Also keep in mind that every body and every lens, even within a
series, is different. You have to calibrate your own equipment if you
want really good results.
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