Since I use only stopped down mode with A7, (EVF makes up for any drop in
brightness stopped down) The impact of shutdown mechanism on lens sharpness
goes away completely for improved results.
Tim
________________________________
From: Fernando Gonzalez Gentile <fgonzalezgentile@xxxxxxxxx>
To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>
Sent: Sunday, November 30, 2014 6:52 PM
Subject: Re: [OM] OM 180mm F2.8 opinions
Good question ... I simply don't know.
ESIF doesn't tell enough.
But Gary Reese tells his results with the 1.4X-A were better than
expected than *without* the 1.4 - "SQF grades exceed those without
teleconverter due to use of a lens support. Without additional lens
support, the shutter and auto diaphram mechanisms in the OM-1n test
camera probably induced harmonic vibrations which impaired image
quality."
http://tinyurl.com/ltu93oz _ but it shows quite an improvement!
Fernando.
On Sun, Nov 30, 2014 at 10:05 PM, Hughes <timhughes@xxxxxxxx> wrote:
> Probably not well enough known for the prices to reflect that.
> I wonder if the optical design improved much too ?
> T
>
>
>
> ________________________________
> From: Fernando Gonzalez Gentile <fgonzalezgentile@xxxxxxxxx>
> And it is possible from s.nº > 200.000 - a change in design was made:
>
> "1-Because of a change in optical design, this combination is only
> matched with lenses that have a serial numbers larger than 200.000."
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