Is there any thing i can make or buy (cheap) that can help me focus my camera? I have an Olympus OM-1 camera with a lousy focusing screen and its very difficult to focus using it.
Focusing problems
Started by Astronomer2b, 07/15/2002 06:28AM
Posted 07/15/2002 06:28AM
Opening Post
Posted 07/15/2002 12:40PM
#1
Matthew,
The simplest and most effective is a Hartmann Mask. Get a piece of stiff cardboard, cut so that it will fit over the end of your scope. Cut two matching holes in it, one on either side of the central obstruction. Rig something so that it will stay attached to the end of the scope. (I used embroidery hoops--little rings of wood--glued to the back of the cardboard.)
Place this over the front aperture of an out of focus scope, and you will see two of everything. Bring the scope to focus and you will get one of everything. Remove the mask, and take the picture. (Be sure to remove the mask.....)
Alex
The simplest and most effective is a Hartmann Mask. Get a piece of stiff cardboard, cut so that it will fit over the end of your scope. Cut two matching holes in it, one on either side of the central obstruction. Rig something so that it will stay attached to the end of the scope. (I used embroidery hoops--little rings of wood--glued to the back of the cardboard.)
Place this over the front aperture of an out of focus scope, and you will see two of everything. Bring the scope to focus and you will get one of everything. Remove the mask, and take the picture. (Be sure to remove the mask.....)
Alex
Funding Member
