What are the available aperture sizes for the SpectroDens?Created OnJune 25, 2019byJosh Katowitz You are here: Home Products What are the available aperture sizes for the SpectroDens? BackWhat are the available aperture sizes for the SpectroDens? The SpectroDens comes standard with a 3mm aperture. There is also a 1.5mm aperture available for an additional cost.