Okay, so I’ve figured out the solution to the mystery connector on my IR cut filter, I think. I took a good careful look at the connector. I measured the distance between the pins to be about 1 mm, but alas, I concede that I couldn’t do a highly accurate measurement and they could be just as well 1.25. Finally, I took a good careful look at the RC Groups JST connector confusion page, and after careful analysis of minute features of the various connectors, I’ve determined that my connector must be a Molex PicoBlade, not a JST. Using the metrics on the site of the outside dimensions, I measured the outside dimensions of mine to confirm that they are the same. The distinguishing features of Molex PicoBlade are blade-like receptacles and the lip protrusion details. It’s important not to draw conclusions about the micro-scale connector designs based off of pictures of the larger scale connectors.
20181117/https://en.wikipedia.org/wiki/Molex_connector
20181117/https://en.wikipedia.org/wiki/JST_connector
20181117/https://www.rcgroups.com/forums/showthread.php?1493712-JST-connector-confusion-the-real-story
20181117/https://static.rcgroups.net/forums/attachments/6/9/1/2/6/a4299114-113-4%20JST%20%20Plugs.jpg
20181117/http://www.micronwings.com/HintsAndTips/RCConnecorTypes/index.shtml
20181117/http://www.micronwings.com/HintsAndTips/RCConnecorTypes/Molex3P/index.shtml
20181117/http://www.micronwings.com/HintsAndTips/RCConnecorTypes/Molex2P/index.shtml
Now, what about other small modular electrical connectors that I’m going to use in my Raspberry Pi 3D scanner project? Am I going to use Molex PicoBlade or micro JST? Well, my goal was to use practically the same small white plastic modular connectors are used inside my XMODS RC car to connect with the extra lighting doodads. So, I checked those connectors in detail, and indeed, they are Molex PicoBlade because they have the distinctive blade-like receptacles.