Product Description 3D model step file: Please contact us via [email protected] Laowa Aurogon FF 10-50X NA0.5 Supermicro APO Magnification 10x 20x 35x 50x Adjustable numerical aperture（NA） 0.5/0.45/0.4/0.35/0.30/0.25/0.2/0.15 Working distance (mm) 20 Maximum objective diameter (mm) 50 Length of objective lens (mm) 167 Weight of objective lens (g) 390 Aperture blades 9 Wavelength range (nm) 435-656 Objective lens tube lens focal length (mm) 18.8 10.3 6.85 5.56 Special tube lens for Laowa model 10X Magnification tube 20X Magnification tube 35X Magnification tube 50X Magnification tube Maximum diameter of tube lens (mm) 70 Length of tube lens (mm) (excluded cover)  112  163  210  253 Weight of tube lens (g)  377   444  530  609 Maximum distortion 0.60% 0.80% 0.40% 0.40% Image field diameter Full frame (24mm×36mm) Conjugate distance (mm) 299.4 370 420.2 465.1 Mount PL / EF / F / E / RF / Z / L / GFX Depth of Field Table Depth of Field（mm） NA 10x 20x 35x 50x 0.50 0.0065 0.0033 0.0019 0.0013 0.45 0.0073 0.0036 0.0021 0.0015 0.40 0.0083 0.0041 0.0024 0.0017 0.35 0.0094 0.0047 0.0028 0.0019 0.30 0.011 0.0055 0.0032 0.0023 0.25 0.0132 0.0066 0.0038 0.0027 0.20 0.0165 0.0083 0.0048 0.0034 0.15 0.022 0.0109 0.0064 0.0045