Canon EF-S 18-135 Lens Hoods

thingiverse

Human: Custom Full and Tulip lens hoods for the Cannon EF-S 18-135 lens.\nSeveral key features distinguish these hoods from others:\nThe hood does not utilize threads to secure filters so they can be attached without removal.\nThe locking mechanism attaches to the outside ring of this specific lens, and a locking ring secures it firmly in place, ensuring the hood won't rotate or come loose.\nThe tulip shape is derived directly from the lens's optics, maximizing light blocking while maintaining a clear shot without interference.\n\nInstructions for assembly: These hoods will challenge even skilled creators to achieve precise prints. To overcome this obstacle, printers must be meticulously calibrated with perfect filament diameter, optimal extruder temperature, and solid print bed adhesion.\nThe 0.1 mm layer settings used here were successful; attempting thicker layers can lead to compromised print quality in threads and other features.\nPrint the hood at 100% infill and employ a single outer shell for enhanced durability. Walls approximately 2 mm thick demand considerable strength.\nAs the ring prints, resist the temptation to manipulate or apply pressure to the locking tabs - doing so will likely break them, particularly with PLA.\nThe moment both pieces are printed, delicately push the tabs inward while fastening the locking ring. Although a demanding process, sticking with it guarantees success; fortunately, the hood and ring assembly requires no disassembly.\nFor proper installation, orient the hood 90 degrees from its final position before securing it onto the lens, then gradually adjust until in its intended location. A subtle marking on the bottom (near the threads) serves as an aid for alignment with the lens's corresponding mark.\nHandling the locking ring calls for a gentle touch to avoid causing the metal to warp, which results in increased resistance during operation; although not entirely preventable, enhanced infill percentages minimize this effect but cannot eradicate it completely.