It had been a rough morning, Chuck, and I just didn't write it down. My
point is, that I would seldom use a large aperture when shooting at
infinity, so the technical point about the thickness of the adapter is more
academic than useful.
I appreciate your concern for the details, but I think I will let this one
slide by. Thanks.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Monday, August 22, 2011 2:23 PM
Subject: Re: [OM] Was: mount mod; Now M42-to-4/3 Adapter Thickness
> You really should keep track of the apertures used. There is a distinct
> difference between the images but it not in the distance... it's in the
> foreground. The leaves and grass in the foreground at left are much
> sharper in the Takumar shot than with the Summicron. The Takumar was
> focused closer and/or shot at a smaller aperture than the Summicron.
>
> Chuck Norcutt
>
>
>
> On 8/22/2011 12:47 PM, Jim Nichols wrote:
>> Chuck and Chris,
>>
>> I processed a RAW image made with a 55mm Takumar on my Fotodiox adapter
>> (7mm flange to flange), mounted on the E-1. I did not record an exact
>> f-stop. The lens was set at the infinity stop.
>> http://gallery.leica-users.org/v/OldNick/Takumar+55+at+Infinity+Mark.jpg.html
>>
>> The white traffic signs seen on the left side of the street were
>> approximately 250 feet away.
>>
>> I shot a similar RAW image with a 50mm Leica-R Summicron on a
>> Leica-R-to-4/3 adapter, mounted on the E-1. This lens has focus travel
>> past infinity, so it was focused on the most distant object. On the
>> focus scale, this was about the width of the infinity symbol ahead of the
>> infinity stop. Processing was identical to the previous image.
>> http://gallery.leica-users.org/v/OldNick/Summicron+Focused+at+Infinity.jpg.html
>>
>> To my eyes, viewed at 100% before any resizing, I can't tell much
>> difference except for the difference in lighting. Cars at 250 to 300
>> feet have similar sharpness.
>>
>> I conclude that, for practical purposes, the 7mm adapter will serve its
>> purpose.
>>
>> Jim Nichols
>> Tullahoma, TN USA
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