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90mm f1.0 'project' anyone?

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photo_owl

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what a deal!

Only need to add some sort of cocusing mechanism, maybe an aperture pocket (for slip in apertures) and of course, a 4/3 mount.
Wish I had the patience for such a project
--
Art P



Select images may be seen here:
http://www.flickr.com/photos/8131242@N04/
 
how to focus with that lens ? where is the focus ring ? nt
--
Martin F.

OlympusE330and2xPanasonicL10.

Typing errors are intended to provide a basis for global amusement.
 
in the adapter you'd have to build, along w a slot for different aperture rings... Hey, if you're real good, you could use the mechanism from a 40-150 and get it to AF and report correct FL to the camera... but then aperture reporting would be off....
--
Art P



Select images may be seen here:
http://www.flickr.com/photos/8131242@N04/
 
They mention the rear thread is about 43mm. I wonder if it's an m42 mount thread. If that was the case, fitting it to any DSLR would be no problem at all.

Then you'd be left with a fixed focus f1 lens. Carry around a stick the length of the focusing distance or a tape measure and you're sorted!
 
Gidday Kuppen
Kuppenbender said:
They mention the rear thread is about 43mm. I wonder if it's an m42
mount thread. If that was the case, fitting it to any DSLR would be
no problem at all.
Click to expand...
Possible ...
Kuppenbender said:
Then you'd be left with a fixed focus f1 lens. Carry around a stick
the length of the focusing distance or a tape measure and you're
sorted!
Click to expand...
Or look through the viewfinder ... ;-))

In my youth, I would have leapt in and bought it, just for the fun. I have a mate (optical technician) who could easily build the stuff to make it work ... He can cut custom threads, make adapters, etc, etc. Piece of p!ss compared with building a 30" telescope ...

--
Regards, john from Melbourne, Australia.
-- -- --

The Camera doth not make the Man (or Woman) ...
Perhaps being kind to cats, dogs & children does ...

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Member of UK (and abroad) Photo Safari Group
 
The images demonstrate how the size of the lens would increase were Olympus to compete with Canon/Nikon/Pentax/Sony in DOF and light gathering. Compare on Olympus camera it would have to be somewhere around f/0.7 to match even what is already as common as f/1.4 in FF format. The 85mm f/1.4 is not as nearly as big as the f/1 lens shown for this eBay auction.

Save the images for future examples, and before they disappear from ebay.
 
how hard it would be to fit that thread onto an enlarger lens board.

--
'And only the stump, or fishy part of him remained'

http://www2.gol.com/users/nhavens
A Contemplative Companion to Fujino Township
 
The competition for a 85/1.4 would be a 42.5/0.7 - guess what - same size aperture.

90/1 has an aperture 50% larger than either.

Regardless of sensor size, aperture (not aperture ratio) determines noise levels.
 
Tried to get it but was outbid. Oh well, would have been a nice experiment but I can live without it.

--
Equipment in the profile.
 
not that I cannot pay the price, but its more a experimental lens than a real workhorse lense because I surely cannot make a real good mount adapter, and for that the achieved price was to much. I could have make a "realiable working" mount adapter but nothing I can use when if a hurry. but watching was interresting
Martin F.

OlympusE330and2xPanasonicL10.

Typing errors are intended to provide a basis for global amusement.
 
Martin Frost said:
not that I cannot pay the price, but its more a experimental lens
than a real workhorse lense because I surely cannot make a real good
mount adapter, and for that the achieved price was to much. I could
have make a "realiable working" mount adapter but nothing I can use
when if a hurry. but watching was interresting
Click to expand...
I would have been able to have a nice adapter made but was more concerned about the lack of information about the lens. As someone already pointed out, it could be a telecentric machine vision lens which would really limit it's applications or it could be just lacking or resolution, or both...

Too much of a gamble at that price. I was still prepared to pay $250 including shipping to Finland. I guess I have to find something else to play with...

--
Equipment in the profile.
 
DriftForge said:
The competition for a 85/1.4 would be a 42.5/0.7 - guess what - same
size aperture.

90/1 has an aperture 50% larger than either.

Regardless of sensor size, aperture (not aperture ratio) determines
noise levels.
Click to expand...
lets see how this cuts
so its 90/1, and on FF for equivalent image that would be 180/2
ok that looks possible...Leica APO, OM 180/2

but then for exposure, its still F1 on 4/3rds,
FF wouldnt have the option of shooting an F2 lens at F1

so lets say you use the same lens on a 4/3rds body and a FF body
and on 4/3rds, the DoF is exactly half that if you put it on FF

no the images are not equivalent
but hey, who cares !
the dof is effectively more shallow,
after all, isnt that the object....

--
Riley

When I die I want to go peacefully sleeping like my Grandfather did...
not screaming, like the passengers in his car....
 
1 guy bid against himself !
--
Riley

When I die I want to go peacefully sleeping like my Grandfather did...
not screaming, like the passengers in his car....
 
I believe that's e-bay bidding for him up until his highest bid he's placed.
--
Cloverdale, B.C., Canada
Olympus e-510 L1
http://joesiv.smugmug.com
 
--
  • enjoy your camera equipment -
 
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