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Shuttershock and Olympus 75-300

Since a couple of months I own the Olympus 75-300 III. And since day one, I wasn't happy with the results I got. 
All the pictures shot at +/- 300 mm where soft and looked like there was motion blur. How's that possible? I tried it at a 1/1000th of a second, but still the motion blur in my pictures. I regret that I ever sold my Pentax with the 55-300 for this awfull lens!
But... Most reviews of this lens are positive. Is my copy of this lens bad?
I then figured out by reading forums that it could be a phenomena called 'shuttershock'. It that case, the shock of the shutter causes enough movement so the image is blurred.
For example:

How to fix this?
My camera has several drive modes, including one called 'anti-shock'. And that does magic.
In that mode The pictures are sharp again. No motion blur is visible! 
The downside of this mode is that the fasted drivemode can't be used.

CarrySpeed strap

A couple of weeks ago I ordered the Carry Speed CS-1 MK II strap. The maker of this strap claims it's an better alternative to the well known straps from Black Rapid and Sun Sniper.
Some of the advantages:
  • The best thing is the price! It's only $28,99 as the others costs more than double that price.
  • The offset hanging design with tripod mount ready
  • The perfect allignment to the body 
  • It's not directly connected to the bolt so it wouldn't loose easily
  • The free under arm strap holds the strap in place very well
Some disadvantages
  • The quality of the belt's material is not that great. It's looking cheap, but I think it would hold for years
  • The shrew is to long, so I had to put some stuff between the speed connecter and the camera.
  • The locking clips feel cheap (and I think they are)

As you can see I think the build quality is not as good as the others, but do I need that? I won't use the strap for more than a hundred years, so....

The advantage is the special connection system. My camera is hanging perfectly aside my hip. The under-arm-strap divides the weight of my camera around my shoulder.

After a couple of months I stopped using the strap. I switched to Op/Tech because of it's easy of use. The biggest problem with the Carry Speed strap was the bold. I had to tighten it every hour because it was getting lose by itself.

The other problems were

  • The lockers. They where stabbing me when walking around. 
  • The material was scrubbing my skin, it's not soft enough.

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