Over time in search for a very solid
stand for photographing very small fields of view, ( this means in
the range of one Millimeter), I got a Leitz Ortholux I stand
via Ebay. It was without objective lenses, illumination optics,
oculars but with the trinocular photo tubus, a 4-fold Turret and
|Adaption of a digtal camera with bult in (zoom)-optics using a ocuar as relay lens.
was done first with a Canon EOS 400. As this camera
has a mirror and slotted shutter, much more vibration happened,
disturbing sharpness significant. Even with mirror lock up features
the results with small field of view have not been satisfactory.
Later I discussed the use of a micro four thirds camera with Stephan
Wolfsried. This type of cameras have a somewhat smaller imager but no
mirror, so I followed the idea of Stephan Wolfsried an adapted a
Panasonic Lumix D2 to my system. For the micro 4/3 lens
mount, adapters to almost any type of lenses are available
and the much shorter flange back of the micro 4/3 standard allows the use of almost
any lens with larger flange back by the suitable adapter.
During the adapting process of the Lumix D2 also some trouble with vibrations from the shutter have been observed, indicating that the weak point is not only the within the camera, also the connection of the camera to the photo tube is critical. All the adapters have some tolerances. So the camera was fixed with an extra connection via the standard 3/8” thread at the camera bottom to the microscope stand. (see picture below). This improved sharpness much, but in very critical cases it can be helpful to use longer exposure times (3-5 sec.)
|The microscope turret is loaded with the following lenses:
|All lenses are used with open aperture. The Lumix D2 camera works excellent in this configuration. For pictures a stack of typical 15 to 40 levels ist taken, distances are indicated in the table above. Only the camera related software is relative poor, as there is no remote control software in the package. Results can be seen here within the pages here or at mindat.org
|My pictures at Mindat
|Leitz Ortholux I
|Benefits of stacking