Raspberry Pi Camera Objective Lens Adaptor

thingiverse

Holder which mounts microscope objective lens on Raspberry Pi Camera v2.1 board, reversing its position. Four M2 screws plus nuts connect it securely to PCB. OpenSCAD file can be easily modified for other lenses. This one fits perfectly with an AmScope 4x objective from http://www.ebay.com/itm/381613828736, transforming the RPi camera into a long telephoto lens equivalent to 250 mm on a full-frame SLR. UPDATE: An optional mounting ring is added, featuring a pocket that captures a 1/4-20 hex nut for standard tripod mounts. The resolution test above showcases a 1:1 crop of an 8Mpixel camera image, displaying a target measuring 18 cm across the "T" marks at 9.6 m. Calculations indicate this lens has a focal length of approximately 27 mm and a horizontal field of view (HFOV) around 8 degrees on this sensor. To use this holder effectively, you need to remove the factory lens first, exposing the uncovered sensor. You can employ one of the available lens tools to crack open the glue on the lens thread; either http://www.thingiverse.com/thing:1557754 or http://www.thingiverse.com/thing:1574661. UPDATE: For those seeking a long lens for the RPi v2 Camera, consider printing this M12 adaptor mount from http://www.thingiverse.com/thing:1963856 in conjunction with an M12 lens like http://www.ebay.com/itm/282167088666, which boasts impressive image quality potentially surpassing that of the microscope objective used here.