For cil341 130FOV lens you must remove the internal IR filter to allow the lens to screw in far enough to come into focus.

Remove the 2 phillips screws

Remove the 2 phillips screws

Use a flathead screwdriver to carefully pop out the IR filter without damaging the CMOS

Use a flathead screwdriver to carefully pop out the IR filter without damaging the CMOS

Use needle tweezers to remove the rubber gasket that sat behind the IR filter

Use needle tweezers to remove the rubber gasket that sat behind the IR filter

The Lucid Triton camera comes with a C-mount thread. To attach an s-mount lens, we use a s-to-c mount adapter. There are many types of s-to-c-mount adapters. We prefer a simple one that can thread to the bottom of the c-mount thread to form a “cup” to hold glue.

The adapter can be tightened with a small Allen wrench or a spanner wrench (preferred).

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Teflon tape is wrapped around the s-mount lens to increase friction to better hold the position of the lens and to reduce play. The teflon tape should not extend more than halfway up the threading. We double the tape over (hotdog style). Be careful not to apply too much teflon tape, as we want the glue to touch the s-mount threads and not just the teflon tape.

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Screw the lens in until the teflon is not exposed (halfway).

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Camera is pointed outside the window at a far away building with spires. A building with windows with sharp corners is also good. Adjust focus until church cross is sharp. Adjust focus at the center of the image because the focus can be different at the edges of the image.

Camera is pointed outside the window at a far away building with spires. A building with windows with sharp corners is also good. Adjust focus until church cross is sharp. Adjust focus at the center of the image because the focus can be different at the edges of the image.

A close-up of the church steeple. The cross is an excellent object to adjust the focus. The cross is 470 meters away. Alternatively, we also focus to the sharp window corners of a building that is 130 meters away.

A close-up of the church steeple. The cross is an excellent object to adjust the focus. The cross is 470 meters away. Alternatively, we also focus to the sharp window corners of a building that is 130 meters away.

We can also use this bulding 2.4km away

We can also use this bulding 2.4km away

With a 30 degree lens, we have features that span roughly a pixel.

With a 30 degree lens, we have features that span roughly a pixel.

Gently rotate the lens in then out until a good focus emerges. Go back and forth over this range until you get a feel for the best focus. Tilt the camera up, apply a small amount of super glue to the top of the lens at the threading. This will hold the lens in place during epoxying. Angle the camera back down and examine the focus target again. You have around 30 seconds to make any last second fixes to the focus. When it is in focus, leave the camera still for 10 minutes, until the super glue is set.

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Tilt the camera straight up to apply glue. The s-to-c-mount adapter is screwed all the way down to provide a “cup” for the glue. Gravity will hold the glue in the cup. Make sure that the glue covers where the adapter covers the c-mount threads and the s-mount threads because we want a waterproof seal. We use 3M DP420NS Black Epoxy. This epoxy is viscous and requires probing to get it into all the corners. We are looking into applying “Krazy” glue before potting to maintain the camera focus and a less viscous epoxy to simplify the epoxy application.