On 6/17/2019 9:51 AM, Wayne Shumaker wrote:
I do miss the zuiko OM 16mm.
I think the Panny 8/3.5 is a worthy successor for µ4/3. Then the Oly 8/1.8 Pro offers speed in return for $, size and
weight.
Brand FL AoV Optical Diaphragm F/stop Min. Focusing Weight Length
Max. Hood Filter
Const. range Focus
--------------------------------------------------------------------------------------------------------------------------
Olympus OM 8 mm 180° 11-8 Auto 3.5~22 0.2m. Helicoid 180g. 31mm 59mm
Not Built-in
-------------
Sony E = 56mm needed (L39)
µ4/3 = 58mm (Y48)
(O56)
--------------------------------------------------------------------------------------------------------------------------
Panasonic 8 mm 180° 10-9 Auto 3.5~22 0.1m. Internal 165g. 52mm.
60mm. Built-in Rear
--------------------------------------------------------------------------------------------------------------------------
Olympus µ4/3 8 mm 180° 17-15 Auto 1.8~22 0.12m. Internal 315g.
80mm. 62mm. Built-in None
The Panny is slightly smaller and lighter than the 16/3.5. Length is not obvious, as the 16/3.5 is designed for OM
mount, clearing the mirror. With adapters to Sony FF or µ4/3, it's actually longer than the Panny. Makes sense, as it
has the built-in filters.
FYI I found this:
https://www.lonelyspeck.com/defish/
Thanks, an interesting link. I tried his technique, and, guess what, it stretched corner stars into lines. Just what I
expected. Also, of course, by focusing on the skyline on the bottom half of his image, he has even further distorted the
Milky Way into half a circle., which should also be straight. I don't think there's any way to use a Fishy for what he's
trying to do.
For terrestrial photography, it's simple, keep the camera level in both planes, then crop top and/or bottom as desired
after correction.
If you must shoot pointed up or down from level, apply fisheye correction, then
do perspective correction.
Hemi Fishy Moose
--
What if the Hokey Pokey *IS* what it's all about?
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