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    Pentax Papilio - Collimation and convergent lenses

    I checked collimation at infinity using the imprecise method of comparing the distance to the edge of field of a distant point object in each barrel, and it seems to be ok. Not perfect, but within what I generally find tolerable. Having said that, while vertical collimation is easy to get a good...
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    Pentax Papilio - Collimation and convergent lenses

    Thanks for that clarification - that makes sense. To me, the experience of looking at something at very close range takes a bit of getting used to. I tried looking at a something on my screen door at minimum focus distance and the indistinct, repetitive pattern of the wire mesh tied my optic...
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    Pentax Papilio - Collimation and convergent lenses

    Hi All - I'm a bit new to this so bear with me. I just received a Pentax Papilio 6.5x in the mail. They are amazing! But I can't tell if my pair is out of collimation, or if this is just how they are because of the unique focusing system... I've done the quick test of collimation by focusing on...
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