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Re: [OM] Changing lens mount

Subject: Re: [OM] Changing lens mount
From: "Bill Pearce" <bs.pearce@xxxxxxx>
Date: Sun, 28 Nov 2010 20:56:45 -0600
I got some battery adaptors for the hasselblad 500elx from fotodiox, and
they are really well made. 

 

Bill Pearce

 

From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx] 
Sent: Sunday, November 28, 2010 5:25 PM
To: Olympus Camera Discussion
Subject: Re: [OM] Changing lens mount

 

Lots of them to be found on the bay at from $19-95.  Here is the
FotoDiox adapter at $46.  Not stainless steel but brass & chrome.
<http://cgi.ebay.com/Fotodiox-Leica-R-Lens-Nikon-Mount-Adapter-Pro-/36018420
2131?pt=Lens_Accessories
<http://cgi.ebay.com/Fotodiox-Leica-R-Lens-Nikon-Mount-Adapter-Pro-/36018420
2131?pt=Lens_Accessories&hash=item53dca6c393> &hash=item53dca6c393>

Search ebay with:  Nikon "Leica R" adapter

Chuck Norcutt


On 11/28/2010 5:00 PM, Bill Pearce wrote:
> If I recall what I have seen on the LUG list, there is someone somewhere
> that makes Nikon mounts for Leica SLR lenses. Don't think that didn't get
my
> heart pumping. Perhaps womeone that has pass less alcohol over the
synapses
> remembers who he is and if he makes other mounts to change other lenses to
> something other that what they were born with.
>
>
>
> Bill Pearce
>
>
>
> From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
> Sent: Sunday, November 28, 2010 1:48 PM
> To: Olympus Camera Discussion
> Subject: Re: [OM] Changing lens mount
>
>
>
> Even for lenses designed at the outset to have different mounts (eg:
> Vivitar, Kiron, Tokina) changing from one mount to the other was never
> simply a matter of popping off the old mount and popping on the new.  If
> you look at the parts diagrams you'll see that there are numerous parts
> involved in making the switch.
>
> As Jeff says, there is a fundamental difference in register distance
> between Practica B and M42 with the Practica lens falling more than 1mm
> short of reaching infinity.  I wouldn't say that it can't be done but
> there would be a lot of very precise metal surgery to be done.
>
> Chuck Norcutt
>
>
>
> On 11/28/2010 12:49 PM, Jeff Keller wrote:
>> Praktica has a register distance of 44.4 while M42 has 45.46. The
> thickness
>> of what you remove from the lens would have to be 45.46 - 44.4 = 1.06 mm
>> thinner than what you add back on to maintain infinity focus.
>>
>> http://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html
>>
>> Also, your m42 mount camera might have limitations on how far the back of
>> the lens can extend into the camera. If the Practica lens has an auto
>> diaphragm you would probably have to use manual stop down.
>>
>> Jeff Keller
>>
>> -----Original Message-----
>> From: AS [mailto:alizookoman@xxxxxxxxx]
>> Sent: Sunday, November 28, 2010 7:22 AM
>> To: Olympus Camera Discussion
>> Subject: [OM] Changing lens mount
>>
>> I want to try changing lens mounts. Is this as easy as removing the old
>> mount and popping in the 'new' mount? Instead of screwing in the new
mount
> I
>> am thinking of using some type of glue.  The lens mount is PB mount right
>> now and I want to convert to M42 mount.
> --
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