In a short thread of long, esoteric posts, Mike speculated on how to mount MF WA lenses on mirrorless so that they can
focus from very close up to infinity.
This solution presented itself.
<https://www.cambo.com/en/actus-mini/cambo-actus-mini-view-camera/>
And, Mike, you won't need the T-S adapter. :-)
<https://captureintegration.com/first-look-cambo-actus/>
Other than that, I'd vote for the Oly Bellows mods for cost.
<https://www.bhphotovideo.com/c/product/1131857-REG/cambo_99010700_actus_b_view_camera_body.html>
Alternate View Moose
==========================================
On 2/15/2017 4:13 PM, Moose wrote:
On 2/14/2017 4:06 PM, Mike Gordon via olympus wrote:
The elgant but hard way Moose writes:
<<Well, OK, there is a possible elegant manual solution, using/modifying an Oly Bellows (and possibly leaving it so
it can be restored.)
. . .
<<That would do the job of allowing focusing by moving camera body relative to a fixed lens with excellent, smooth
control. And yes, the A7 will clear everything on the bellows. Looking on Camreasize, is appears the II and RII would
also work.
Thanks for the directions and providing food for thought--not sure I have the heart to modify my LN bellows from Bill
Barber.
They are going for less than $100 on the 'Bay, some for a lot less. I bought a second a while ago mostly to get a
second focusing rail to put my Focus Stage on, so I wouldn't have to disassemble the bellows to use a focus rail.
Would like to use a very good lens in front but wonder if using a longer
registration lens like an old t-mount
The problem with T-Mount is that the adapters all correct for registration distance. Some sort of surgery would still
be required to shorten the mount adapter. For those like ChrisT with machine tools and skills, that's a doodle, but
not for me.
Another arts and crafts, as opposed to machine tool, solution would be to remove the fabric bellows entirely, which
only requires a small cross-point screwdriver, and make a temporary bellows out of black rubber, or some such, which
would "bellow" out from between the standards, rather than compressing between them. With the bellows removed, the
standards collapse to 12 mm. So maybe with rubber bellows 15-18 mm, still leaving LOTS of room for focusing past
infinity. The rear mount adaptation I suggested would still be needed.
or even Mamiya 645 may be made to work and not require bellows surgery. The Mamiya 35 isn't bad but does have more
CA than I would like but would also work on my Mirex T-S adapter. I think Kiron made a pretty good Tmount 28mm
perhaps branded as vivitar but don't clearly remember and it may be hard to find.
As with 1:1 mag, the folks writing about this stuff seem fixated very on wide angle. Is 35 mm wide enough? With the
above approach, anything down to 18 mm is easy with existing OM lenses.
The problem is then the possible thin custom adapters required--they don't come cheap from Srb griturn if they
even will fabricate them anymore. I also wonder what would happen if one mounted a WA on a screw macro rail
http://www.reallyrightstuff.com/B150-B-Macro-focusing-rail (there are cheaper alternatives) and moved the cam back
the same amount the helicoid moved the entrance pupil forward????? perhaps mount a laser to align i
t in front--no clue what happens to the framing and whether one could get the images to align and clean up OK in
post. May be a recipe for madness.
Yeah, that sounds crazy making. The Oly Bellows is amazingly smooth and precise - and a lot cheaper than that RRS
rail. I have a couple of other, cheap, focusing rails/devices, and they just aren't very good.
Macro landscaper or mad as a hatter, Mike
There's a difference?
Been Known to Macro Moose
--
What if the Hokey Pokey *IS* what it's all about?
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|