I typically have to adjust mirror angle. Minor impact will throw that
out. Finder focus (mount to focus screen) is a dog to adjust and I have
not done one since I left Olympus.
___________________________________
John Hermanson | CPS, Inc.
21 South Ln., Huntington NY 11743
631-424-2121 | www.zuiko.com
Olympus OM Service since 1977
Gallery: www.zuiko.com/album/index.html
On 8/18/2010 3:58 PM, usher99@xxxxxxx wrote:
> AG writes:
> "Of course, I must acknowledge the elephant in the room. Calibration
> accuracy of the focus system in the OM-3Ti is probably not that good
> and you also run into the issue of film flatness. But those are issues
> outside of the discussion regardling human abilities."
>
> Thanks for that whole excercise. I wonder how much of an issue the
> calibration actually is? John has stated that thisi s factory
> callibrated and he only had to adjust things a very few times over the
> years. Canyon doesn't advertise but tacitly admits slop in the system
> as they sell shims for the focusing screens for those that want it spot
> on as possible. The stock screen really allows MF at about f4 and the
> Ee-s perhaps 2 stops more precision.
> I am guessing and have seen others assert that the 1-13 allows
> accurate focusing assuming the system is alligned at about f1.4 and the
> 2-13 though brighter results in a stop or so loss of precision. Hate
> that no free lunch principle of optics.
>
> A mostly in focus,
> Mike
>
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