Hi Chuck,
Thanks for the data. Since I squeezed Superglue into the adapter, I may
have altered the spacing a little. At different points around the adapter,
I measured from 7.0 to 7.2mm.
I seldom work at infinity, and when I do, DOF may bail me out. I will check
next time I use the adapter. I can't say for sure about the Pentax lenses,
but several SLR lenses will focus past infinity. For sure, my Leica
Summicron 50 will do that.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Sunday, August 21, 2011 2:39 PM
Subject: Re: [OM] mount mod: nikon/canon to OM
>
> Register distances in mm - M42, 4/3, Micro 4/3
>
> |------------M42-45.46------------------------>|
> |
> |------------4/3-38.58----------------->|<6.88>|
> |
> |------Micro-4/3-20->|<-----------25.46------->|
>
>
> According to the specs I have, both of you should be having some
> difficulty getting to infinity. There seems to be some confusion
> whether the M42 register distance is 45.46mm or 45.50mm but, in any
> case, the difference between the 4/3 and M42 doesn't quite reach 7mm and
> certainly not 8mm.
>
> Chuck Norcutt
>
>
> On 8/21/2011 3:07 PM, Chris Trask wrote:
>>>
>>> As added information, the flange-to-flange thickness of the Fotodiox
>> adapter
>>> is 7mm, excluding the bayonet length.
>>>
>>
>> Mine is 8.0mm. Judging from the picture in the eBay listing, I
>> would
>> say that the one I just bought from India is in the order of 1.5mm, same
>> as
>> the depth of the locking recess on this one. We shall soon (3-4 weeks)
>> know.
>>
>> Chris
>>
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