Pentax K5 lens release button

thingiverse

The original Pentax K5 has a major flaw with its lens release button coming loose from the camera body, so after repeatedly gluing the original button numerous times, I decided to take matters into my own hands and design one myself. After several attempts, the result was exactly as good as I had envisioned. The new button can be used either with or without the rubber seal (I can't guarantee that the camera remains waterproof even if you use the original seal). Attach the seal to the button (if necessary) and press it firmly in place! USE THIS DESIGN AT YOUR OWN RISK! After printing, I pressed the small pin hard from various angles to verify its strength. The print was strong enough not to break when inserted or used. Therefore, conduct a strength test before using it - it's better for it to break beforehand than after insertion into the camera. If the first print doesn't turn out well, try adjusting the "cut_thick" parameter within the range 0.1 to 0.2 (start with small increments like 0.12 or 0.14) or even 0.08. Also, experiment with different temperatures. I printed eight buttons simultaneously because the button pin becomes extremely hot when printing a single one. Printing five or more allows the button pin to cool down before adding the next layer of plastic. The button was created using OpenSCAD and the source file is included for modification as needed. Print Settings: Printer: CTC Dual Rafts: No Supports: No Resolution: High Infill: 15% Notes: Nozzle: 0.4 Infill: 15% Shells: 2 Layer height: 0.1mm My buttons are printed in PLA. If printing in ABS, the "hold_dia" variable should possibly be changed to 2.2 as ABS is softer and more flexible than PLA, typically shrinking a little more.