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SAMYANG 8mm fisheye and fullformat sensor

PostPosted: Wed Oct 26, 2011 2:03 pm
by gkaefer
On some internet sources I read about SAMYANG 8mm Fisheye that its made for APS-C sensors and the lens is not usage for full format sensors.
if this true and if so why?
(samyang also offers a 14mm fisheye where it is stated usage for APS-C and fullformat sensors...)

Georg

PostPosted: Tue Nov 01, 2011 3:13 pm
by 360pano

PostPosted: Sat Dec 29, 2012 6:24 pm
by tbr
I would like to add that Samyang has released a II. version of the lens with removable hood.
The exact name is Samyang 8mm f/3.5 Asph IF MC Fisheye CSII DH.

Sharpness is fairly good for a fisheye, chromatic aberration is noticable but nothing serious.
I've not tested the lens regarding to lens flare, but i've seen some flares with direct side lighting.
The lens has a pretty thick vignette around the image circle even if stopped down.
This leads me to believe that the mfr has not been updated optics for full-frame purpose, since the lens originally designed for aps-c sensors.
Because of the vignette, the usable image FOV is less than 180 degrees, so clean full-frame sphericals can be produced with min. 4+1 shots.
Overall the lens is a good performer for the price.

PostPosted: Sat Dec 29, 2012 7:02 pm
by HansKeesom
I'll second the positive sounds about this lens. We use it for all our 360*180 work, at APS-C and at 60 degree rotation. For full frame I am not sure if I would go to 90 degrees, but that is something I would doubt about with any fishey lens.

Mind you, the lens is manual almost everything, no autofocus and no exif. But that is fine for use with autopano

PostPosted: Sat Dec 29, 2012 7:42 pm
by klausesser
gkaefer wrote:On some internet sources I read about SAMYANG 8mm Fisheye that its made for APS-C sensors and the lens is not usage for full format sensors.
if this true and if so why? (samyang also offers a 14mm fisheye where it is stated usage for APS-C and fullformat sensors...)
Georg

Hey Georg!

If you need a circular fe for fullframe consider a "shaved" Nikon 10,5mm. This produces a full circle on FX. You loose resolution of course using a circular fe on FX.

I guess your aim is to have as few shots as possible? Another way would be on your 5D2 to use a 2,8/15mm Canon fisheye in a diagonally mount camera - they´re out of production and sometimes available at a "comfortable" price (the new 8-15mm zoom is rather expensive). This way you can use the 180° diagonal fov the lens provides (Nikon provides 170° diagonally) and you don´t need an extra Zenith- and Nadir shot (but Nadir must get edited of course - as it must be with all lenses).

I read very different critics of the Samyang . . i tried one some time ago and definitely wasn´t impressed at all because of very massive CAs and flares. But there seem to be newer versions of better quality.

In the end it´s a question of what you really need: earning money with your work or doing it just for fun. In the first case you save time having a "clean" lens - in the second case i guess spending time with lots of corrections doesn´t matter too much.

best, Klaus

PostPosted: Sun Dec 30, 2012 2:18 pm
by hermer-blr
For Nikon, the Samyang lens exists in AE mode : Hence you can automatically control exposure and you get exif data.

This is the fisheye I use now for my spherical panoramas and I am happy with it, even if I sometime find that it lacks sharpness.