Rokinon 8mm Fisheye in Sigma SA mount.....

Started Feb 6, 2018 | Discussions thread
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Shawn67 Senior Member • Posts: 2,254
Rokinon 8mm Fisheye in Sigma SA mount.....
5

... some assembly required.... (my project for tonight)

$6 Pentax extension tube set base. Right stock, left after using bench grinder to remove most of threaded lip and a diamond hone to do the rest.

Mounting holes drilled using original mount as a template.

Countersunk.

Lens with no mount.

Lens with SA mount. Mount is ever so slightly uncentered. Lens vignettes slightly more on bottom than top on the SDQH.

This will be fun!

Missed it by that much. Almost had it line up but was off slightly. This is an issue if the lens hood is left on as it intrudes into the frame a bit and is now tilted. I will remove the hood anyway for the SDQH to dramatically reduce vignetting.

I also adjusted focus a little with the screws under the rubber focus ring. Too dark for any real samples tonight. Will try and shoot some tomorrow.

Shawn

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