GL3-2.5x     Model Magnification Working Distance Field of View Depth of Field Weight (without frame) Price GL3-2.5X340 2.5X 340mm 100mm 115mm 41g $150 GL3-2.5X420 2.5X 420mm 120mm 130mm 40g $135 GL3-2.5X460  2.5X 460mm 130mm 150mm 40g GL3-2.5X500 2.5X 500mm 140mm 180mm 40g      GL3-2.5X Galilean Loupes can be produced according to your required working distance. GL3-3.0x     Model Magnification Working Distance Field of View Depth of Field Weight (without frame) Price GL3-3.0X340 3.0X 340mm 65mm 70mm 41g $140 GL3-3.0X420 3.0X 420mm 90mm 125mm 40g $155 GL3-3.0X460  3.0X 460mm 110mm 150mm 40g GL3-3.0X500 3.0X 500mm 125mm 165mm 40g      GL3-3.0X Galilean Loupes can be produced according to your required working distance. GL3-3.5x     Model Magnification Working Distance Field of View Depth of Field Weight (without frame) Price GL3-3.5X340 3.5X 340mm 100mm 115mm 41g GL3-3.5X420 3.5X 420mm 120mm 130mm 41g GL3-3.5X460  3.5X 460mm 130mm 150mm 41g GL3-3.5X500 3.5X 500mm 140mm 180mm 41g $145      GL3-3.5X Galilean Loupes can be produced according to your required working distance.   KL1-3.5x     KL1-3.5X340 3.5X magnification with 340mm working distance   KL1-3.5X420 3.5X magnification with 420mm working distance   KL1-3.5X460 3.5X magnification with 460mm working distance   KL1-3.5X500 3.5X magnification with 500mm working distance   KL1-4.0x     KL1-4.0X340 4.0X magnification with 340mm working distance   KL1-4.0X340 4.0X magnification with 340mm working distance   KL1-4.0X460 4.0X magnification with 460mm working distance   KL1-4.0X500 4.0X magnification with 500mm working distance   KL1-4.5x     KL1-4.5X340 4.5X magnification with 340mm working distance   KL1-4.5X420 4.5X magnification with 420mm working distance   KL1-4.5X460 4.5X magnification with 460mm working distance   KL1-4.5X500 4.5X magnification with 500mm working distance