Quote:
Originally Posted by robski
LOL - Yes Don I love it. I'll be interested in your findings.
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Conditions not the best for this Rob, but from the forecast they are getting worse for the week ahead, so I have now done the vibration on a tripod test for the 400mm lens.
We back onto open fields, and with Marham 5 1/4 miles away in a straight line soI have attatched a screen grab of Met Office recorded conditions at Marham.
I had to weigh the table used for the test subject down with my 10kg rotary table due to the wind induced movement. The grey card backdrop, even in a machine vice kept being blown sideways.
As the test was to check if I had solved the issue of lens vibrations as noted in Bjørn Rørslett's review a 5kg weight was suspended from the tripod to minimise the effect of the wind.
Camera : D2X, with cable release used but
NOT mirror lock. ISO 100, aperture f7.1, shutter speed 1/125 sec.
Lens : Nikon 400mm f5.6 IFED AIS
Tripod : Slik proffesional.
Subject distance : 20 feet.
Pics attatched.
Screen grab of Marhams wind state during the test.
A full frame, and two levels of crop. These do contain the exif so there is some form of independant confirmation from the time stamp that the crops are from the posted full frame.
So from my point of view making of the intermediate lens foot is a success.
Don