Set Infinity

The Holga was 60mm, the Diana is 75mm. So you need to set the new assembly 75mm away from the film plane. As long as you didn't open the circle too wide, the lens should snugly fit and allow you to adjust it and stay put.

The Diana can change from infinity to a couple of feet by turning the black dial on the front. Make sure its turned to infinity before moving on.

Moving the lens back and forth changes the focal length of your camera. When it is in the proper position, the focal distances on the front of the lens will actually work.

Grab yourself a tripod and some ground glass within an empty film pack. If you don't have any ground glass a piece of tracing paper taped inside will work just fine, just make sure its flat and not wavy.

Attach the lens assembly to the camera temporarily, we can now set the lens for infinity.

With the camera on a tripod, aim at something far away. Since the lens has no shutter, its already at "bulb".

While looking at the ground glass, move the lens back and forth until the far away scene is in focus.

Most likely the lens wont be exactly parallel all around. Use a ruler to make things as level as possible.

You can also see how close to 75mm you are. Anything between 70-80mm should be ok. Anything else, try again.

With infinity focus set by hand, it needs to be permanently set. Using hot glue, epoxy, or any other goopy material, seal the Diana to the Holga assembly.

If using a clear glue, spraypaint it flat black to stop light leaks. When dry, test your seals with a bright light and continue to seal until its perfectly dark. You may find that adding some sealant to the outside helps too.

The lens is now attached and able to merge easily with the Holga body, but being a toy lens its not perfect and definitely needs help.

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