Yes, I recall that Sigma shot shown here before. I also have a copy of
the Modern Photo catadioptric lens tests in a less detailed form. I'd
forgotten that the Sigma was in there.
I have an Orion (telescope maker) 500/5.6 mirror lens which is equipped
as either a spotting scope or T2 adaptable lens. I've never used it
much as I always considered its contrast as rather low. Strangely, I've
never used it yet on the E-M5 and, IIRC, only a couple of shots on the
5D. Perhaps it's actually a good performer with post processing the
contrast and especially on the E-M5's smaller image circle. Somewhere I
do have a T2->Canon EF adapter and a T2->Olympus OM adapter which I
assume will work OK with the OM-m4/3 adapter. I should try it. (says
he of more intentions than actions) :-)
Chuck Norcutt
On 11/19/2013 7:52 PM, Moose wrote:
> On 11/19/2013 4:14 PM, Chuck Norcutt wrote:
>> Is the 600/8 Tokina a mirror lens?
>
> Oops, brain fart (Just art with an eff.) It's a Sigma, always has been, I
> believe. Yes, a mirror lens.
>
>> I don't think I've ever seen or heard of that lens.
>
> You've certainly seen images made with the Sigma. :-) As this, for example.
> <http://galleries.moosemystic.net/MooseFoto/index.php?gallery=California/Yosemite/Yosemite_2011/Yosemite_Valley&image=_MG_0382oof80m.jpg>
>
> It seems to be made to a higher standard than the mass of 500/8s. Look here,
> and you will see its resolution is right up
> there with the Oly 500/8, if not better. Actually even more betterer, if the
> subject doesn't fill the frame, as it is
> magnified more at that resolution.
> <http://web.archive.org/web/20110720030720/http://brashear.phys.appstate.edu/lhawkins/photo/mp-cat-tests.txt>
>
> OTOH, many shots are through a quite long bit of air, which reduces both
> resolution and contrast.
>
> The lower contrast really doesn't mean much in the day of the digital
> darkroom. Quite a good lens.
>
> I'm not sure I've yet used it with the E-M5. It doesn't exactly fit into the
> light, small, kit paradigm. The 75-300
> gives me a lot of reach, without resorting to tripod and MF. :-)
>
> Super T. Moose
>
--
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