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Re: [OM] New affordable Sony FF

Subject: Re: [OM] New affordable Sony FF
From: Tim Hughes <timhughes@xxxxxxxx>
Date: Tue, 29 Sep 2009 00:02:49 -0700 (PDT)
Hi all OMers, 
                    I did some more searching and found "Domestic_platapus" on 
ebay, seems to have sold an adapter for 7000/9000-O/M not too long back.  

The common adapter for the 7000/9000/alpha on ebay seems to be to Minolta MD, 
which has a register distance  2.28mm less, than that of an OM.  So it would 
would need an added spacer of ~2.28mm with an OM flange to make it adapt to 
OM?  At a wild guess from adapter picture, this would add a total incl 2.2mm 
above,of  7mm to the new register of an OM. So maybe a ~14% change in FL. 
Sounds a large  sacrifice and it might still not accommodate the wide angle 
OM's with the protruding lens guard at rear.



========================
Unrelated :

I came across this  recent Skip williams contribution thread on "must have" OM 
lenses:
http://photo.net/olympus-camera-forum/00ULp5
Old list members will remember skip as an active OM list member and lens 
archivist, from way back.

AND 
Using OM lenses on Leica/Minolta CL rangefinder cameras.
http://www.rangefinderforum.com/forums/showthread.php?t=76055

Tim Hughes

--- On Mon, 9/28/09, Tim Hughes <timhughes@xxxxxxxx> wrote:

From: Tim Hughes <timhughes@xxxxxxxx>
Subject: Re: [OM] New affordable Sony FF
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Date: Monday, September 28, 2009, 10:12 PM

Hi Carlos et al, 
                      Sounds like maybe the "Bowen" adapter has to have a weak 
glass element, because either  the mounting lugs on the flange interfere 
and/or  because the throat diameters are similar and so are incompatible. 
Adding the lens allows the flanges/throats to be separated.  

I could not find any bowers alpha-OM adapters listed on ebay, although there 
are lots of adapters for other vendor's lenses to alpha.  This means you could 
kludge an adapter using a weak lens adapter and machining it down and attaching 
an OM flange if the bowen adapter is unavailable?. 

The pros of doing that would be a 25Mpixel OM lens compatible, FF camera *with 
IS *! 
You can't get that with any  Canon adapted body. 

Reading the Alpha reviews it seems like it is pretty capable, although slightly 
larger than Canon 5D mkII. Seems like the viewfinder is more OM like with a 
large bright prism too. 

Given the high resale prices of Canons, maybe Alphas will drop in price 
quicker. In two years, you could get a deal on a used alpha 900 to adapt to 
your old OM's?

Tim Hughes

--- On Wed, 9/9/09, Carlos J. Santisteban <zuiko21@xxxxxxxxx> wrote:

From: Carlos J. Santisteban <zuiko21@xxxxxxxxx>
Subject: Re: [OM] New affordable Sony FF
To: olympus@xxxxxxxxxxxxxxxxx
Date: Wednesday, September 9, 2009, 8:22 AM

Hi Tim, Mike and all,


Tim hughes wrote:

>In theory you could get an adapter for OM to alpha register, but it

>would be

>pretty thin ~1.5mm. Anybody know if one is available?


Yes, but with such a small distance, the camera's mount should be quite
_wider_ than the lens' mount, otherwise there would be no room for the
bayonet lugs:


>Such adapters do exist, though I have not had my hands on one:

>

><
http://olympuszuiko.wordpress.com/2008/01/01/mounting-manual-lenses-on-sony-alpha-700/
>


From: usher99@xxxxxxx

>The "Bower adapter" looks interesting but has a glass element and is a

>weak TC.  Not an optimal solution.  Perhaps the distance

>is too tight to construct one w/o optics.  I at least have never seen

>such an adapter.


It also mentions incompatibilities with some Zuikos as well :-( Definitely
not a good solution.


Cheers,
-- 
Carlos J. Santisteban Salinas
IES Turaniana (Roquetas de Mar, Almeria)
<http://cjss.sytes.net/>
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