Regarding AF (autofocus) accuracy

- one overlooked aspect you may want to perform from time to time is, to CLEAN the contacts of both camera, especially the lens contacts !

If the contacts are dirty or in other ways are affected - it can sometimes lead to AF issues or inaccuracies.

Just saying.

My former issues with Olympus ED 300/4 IS PRO

It appears to me, that my AF issues with that lens (often being front-focused at longer distances), were mainly happening with the Olympus EM1X camera. Which was very unfortunate (as in hindsight, i see even more missfocused images, as i right now went though a whole bunch of them).

The reason for it is unknown to me. I suspect the camera - but i am not 100% sure. Perhaps it was a "ghost in the machine" - like the Gray market Olympus EM1X i had bought to replace my Olympus EM1 Mark II camera. It seems to me, that the focus error applies with the Olympus OM-1 camera.

It is a pity if the Olympus EM1X was the issue, because it was such a damn good, totally rugged camera). I also notice, that i had no issues with other lenses on the EM1X. (well, all other lenses where much shorter than 600mm focal length - with it, much less apparent).

In the end - I don't know.

What about Gray market products ?

Sometimes, i suspect that gray market cameras and lenses could be a way for the industry to sell second grade equipment, instead of repairing it - or if it can't be repaired or isn't up to the company's standards - instead sell it "under the hand" to the gray market. Thereby still making money on second grade cameras and lenses.

I don't think that is totally out of question or just illusion. The principle of "cheating" and doing "gray stuff" - is i believe far more common than it is not.

It is of course my theory, not a fact - because I can't know these things. I am not an investigator of any kind.

Psychology. Mind-sets. Common factors

Yet - given how the industry works, especially "behind the scenes" and "under the hood" - where greed and money making is today's principle beyond anything else - i wouldn't be surprised if things work this way. That those involved along the chain - have similar mindsets; the greed of always and endless making money. When failure rise, nobody wants to pay for it.

Nothing against capitalism - but when go out of alignment, become aggressive, obsessive, frantic... then failures in the chain of events are accumulating... Which goes on the cost of the consumer. Like "Who gives a shit". Maybe not outspoken, but not totally unheard of in secret.

I mean, look for example at Amazon.

Surely they sell shit in between good stuff. You have a replacement time of 1 frikking month, to return things. Which is abysmal, when you think about it. Quite common is Amazon sells returned, faulty goods, without always checking what exactly was broken.

I often read among the comments, that goods been sold to customers that were already opened, faulty or broken, as well out of date / gone bad.