Focusing Australian Optical Co. Model 1918 Scope?

[Craig Eberhardt]

Ah, you've all missed the IMPORTANT point chaps............. What do you want to focus RobD? If it's the grat that needs focussing, then do exactly what you have been told above, but with a degree of care.

THEN mount the telescope onto something solid, aim it onto a distant aimimg point (a DAP in Artillery parlance) such as a telegraph pole of something similar. Then move your head and eye left and right across the ocular lens and effectively across the field of view. The tip of the grat MUST stay on the same point of the DAP at all times. If it doesn't, or appears to move to the left/right or up/down, you have parallax and you'll need to focus the telescope onto the IMAGE. (Because don't forget, you are actually looking at an image that's now out of optical focus)

Then it becomes a bit more complicated.....................

Hello there,

My pattern 1918 scope is just a little out of focus. How do you suggest I go about focussing it and how will I deal with with any parallax issues? I don't want to touch it if this is going to be difficult. What range should it be focused at?

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