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Pentax K-mount aperture latch for ringlight adapter
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A tiny, slightly adjustable (3-position) f-stop lock for use with [this reverse-mount ring light adapter](https://www.thingiverse.com/thing:2990541).
Place the _V_ of this part over the lens' aperture slider, then slide one of the three notches over the vertical stop for the bayonette mount on the ring light adapter. See pictures.
**Note** this doesn't adjust by sliding. You have to pull it out part way, and replace in a different position.
Place the _V_ of this part over the lens' aperture slider, then slide one of the three notches over the vertical stop for the bayonette mount on the ring light adapter. See pictures.
**Note** this doesn't adjust by sliding. You have to pull it out part way, and replace in a different position.
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