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...)
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.
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
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
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.
If you want something you´ve never had, then you´ve got to do something you´ve never done.