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Using Focal Reducers On Full-Frame Bodies

Started Jul 13, 2014 | Discussions thread
ProfHankD
OP ProfHankD Veteran Member • Posts: 9,147
8mm Fisheye On Focal Reducer On Full-Frame Body

_sem_ wrote:

ProfHankD wrote:

I'm particularly curious about some of the Samyang 8mm lenses being used this way... because they might actually give a usable circle covering a bit more than 180 degrees.

Samyang 8mm are made for APS-C, and I guess you can find relevant info on spherical pano sites. I know shaved Nikkors DX 10.5mm are used on FF bodies (even Canons) for such purposes without focal reducers, indeed covering more than 180deg.

The expectation is a roughly 21.6mm diameter usable image circle with a view angle of approximately 191 degrees...  but we'll soon see. I have the Opteka version of the Samyang 8mm (with removable hood) coming to me as I write this....

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