This image shows a shot of the Samyang (Bower, Rokinon, Walimex) 8mm fisheye lens on a full frame sensor camera. In this case the Sony A7 has been used.
Samyang 8mm fish eye lens on full frame sensor
This is the blog of the PanoTwins
This image shows a shot of the Samyang (Bower, Rokinon, Walimex) 8mm fisheye lens on a full frame sensor camera. In this case the Sony A7 has been used.
Hi Markus,
could you please tell me, what exact lens you used for this shoot? there are many different samyang 8mm lenses. I will use it on a A7Rii, and i want to get exactly this kind of top and buttom cut circular fisheye image as this maximises the resolution for my endproduct. Thanks you alot in advance for your help.
Best regards from switzerland, tobias
Hi Tobias,
here is the link to a more detailed article on our blog:
http://www.panotwins.de/?p=5183
Samyang seems to have made a version II of the lens:
http://www.samyanglensglobal.com/product/detail.do?SQ=17
Hope this helps,
Markus
Thank you for you help. Much appreciated
Would the color fringe around the circle affect 360 sphere stitching?
Hi Gui,
usually not, because before stitching you set an appropriate crop circle, that cuts out the part with heavy color fringing.
However, when you have not enough overlap from your shots (sometimes that happens with the zenith) you may end up with visible artefacts from the color fringe.
When this is outdoors and you have blue sky above you it’s easily fixed in post processing. When you are inside and have a mosaic on the ceiling you better take an extra shot for the zenith!
For the Samyang, which has a field of view that is much larger than 180° this rarely happens.
Hope this helps.
Panotwin Markus
Very helpful! Thanks!
I’m attempting this on a 42MP full frame Sony A7r2, and trying to see how much bang for the buck I’ll get. Being 8mm, its distance resolution falls off pretty steeply, it’s going to lose details in the far landscape.
To get more workable detail from the shot, I’m trying to use “Clear Image Zoom”** , but the lens can only resolve so far for enlargement’s sake: Pushing the lens to 11mm full frame equivalent (1.4x CIZ), with only minor vignetting (no hood), it still appears to only scale well to about 80% of a 42MP picture, or about 33MP equivalent.
**[CIZ is a “digital zoom” that doesn’t suck – AFAICT, CIZ does some sort of over-sampling & sharpening, & if your jpeg sharpening settings are too high, it leaves telltale artifacts]
With some image stacking & deconvolution I might get closer to 42MP-grade work, we’ll see, but I’m beginning to think that with it being such a short lens, it’s more of a close range fisheye than a deep landscape one.
What’s the resolution size of the equirectangular after stitching?
That depends on the resolution of your sensor. If I use the lens on a 24 megapixel sensor (4000 pixel x 6000 pixel), the resulting equirectangular image is 50 megapixel (10000 pixel x 5000 pixel). See an emaple with a 24 megapixel sensor in the article Colonnade at new portal of main cemetery of Frankfurt am Main. If I use the lens on a 42 megapixel sensor (5300 pixel x 7900 pixel), the resulting equirectangular image is 98 megapixel (14000 pixel x 7000 pixel). See an example with a 42 megapixel sensor in the article [DIS]CONNECT @ Schirn Kunsthalle.