Focusing The Lens; Using The Viewfinder With Telephoto Lenses - Starblitz STARlens SL420800 Mode D'emploi

EN

Focusing the lens

In order to get a sharp and clear image, look through
the viewfinder of your camera, and then rotate the
FR
focus ring which is marked « FAR<->NEAR » until
you can see a clear image through the viewfinder.
ES

Using the viewfinder with telephoto lenses

The effectiveness of different types of focusing
screens varies with the focal length and maximum
aperture of the lens.
4
The range finder of microgrid prisms built into the
ground glass do not work as well with longer focal
length lenses as they do with the normal camera
lens and most wide angle lenses, and may blackout
partially or fully, the center focusing spot.
When such a condition exists, focusing is best done
on the ground glass portion of the viewing screen.
On some SLR cameras, long telephoto lenses appear
to produce a cutoff image in the upper corners or
along the entire upper edge of the viewfinder.
The exposed slide or negative will be unaffected by
this viewing deficiency.