BTW Samyang 7.5mm has its own post thread ;)

@duartix Nice. Thanks.

@ttancredi :

You'll loose a lot (and I mean a LOT really) of corner resolution if you go full rectilinear. From a few preliminary tests the goods news is that are some other projections (namely the Panini http://wiki.panotools.org/The_General_Panini_Projection and some of it's derivatives) that work with a lot less frame crop and less expansion on the corners. These will also look a LOT more natural.

The main advantages of the Panini projection is that it keeps vertical and radial lines straight. So if you protect your camera from tilt and make sure that the strong horizontal lines (such as the horizon) crosses the center of the frame (sorry but no free lunch here) then you won't even notice it's a fisheye because almost every thing will look straight. :)

@bheath :

Basically I load the MTS into AE, export it as a TIFF sequence, then I run a batch script that defishes those TIFFs (~@1/3rd real time @50% CPU) into a subfolder with ZERO human interaction and finally reimport the defished TIFF sequence. Very painless. :)

Since I see there is some interest in this matter I'll work on a sample over the weekend and run some tests to see which of the projections is a best overall fit. I can also attach the adjusted script here when I get home. If you are impatient to try it, the original work was done here: http://www.flickr.com/groups/fish-eye/discuss/72157622921262553/72157629468570500/ I just adjusted the scripts for FullHD and TIFF and individualized the projects filenames so that I could run both (Rectilinear and Panini) in parallel (@80-90% CPU).

Hum,.. it's easy I'll do it right here anyway (this is a Windows batch, those versed in shell could easily adapt):

@echo off
set width=1920
set height=1080
mkdir panini
for /f %%a IN ('dir /b *.tif') do (
echo Defishing %%a
echo p f16 w%width% h%height% v140 n"TIFF" >> defishPANINI.pto
echo o w%width% h%height% f2 v140 y0 p0 r0 n"%%a" >> defishPANINI.pto
echo m i0 >> defishPANINI.pto
"C:\Program Files (x86)\Hugin\bin\nona.exe" -o panini/P_%%a defishPANINI.pto
del defishPANINI.pto)

(Sorry for the way I posted but I can't seem to format it in a better way)

Don't forget to adjust for your Hugin instalation folder. Have fun.

@duartix I'd be happy to see some of your tests with rectilinear correction. I'm mainly thinking of the 7.5 as a cheaper and more organic alternative to the 7-14mm. Not sure if it would do it...

@dirkvoorhoeve I'm getting this lens for photo only.

bower, samyang and rokino 1:3.5/7.5mm are the same lens. I've read the Bower and Rokinon are just rebranded Samyangs.

If you use software to make the image rectilinear, please be aware that you will loose spatial resolution! @stonebat can you use lightroom to process movies or do you have to make an image sequence first and batch process?

@athiril did you see the $ 400 Olympus 1:4/9-18mm? Or indeed the Panasonic 7-14 mm. I also read something about a full sensor C-mount lens on this forum once, but can't find it now.

In Lightroom, choosing

• Canon EF 15mm f/2.8
• Canon EOS 5D Mark II

from lens correction option will make the images from Samyang 7.5mm rectilinear :)

@rockroadpix

He is telling about other lens. M43 lens is completely different from their 8mm one :-)

It is smaller and sharper.

Pricey but the Panasonic 7-14 is a good albeit slow lens. I use mine for stills & video.

Are there any UWA rectilinear options? (full 4/3 coverage).

@kronstadt - Samyang m43 7.5 f3.f. Amazing little hockey puck of a lens. Sharp, all manual, cheap as chips.