Pentax 645 Lens Rear Cap

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To safeguard your camera's lens, apply a generic slip-on protector at the rear end. This crucial step prevents damage from accidental impacts. Many users swear by using TPU or flexible filament for this purpose, and their results have been consistently positive. However, it's worth noting that PLA hasn't been tested in this application. This solution is particularly useful when working with Pentax 645 lenses and teleconverters, where added protection is essential.