Size:67MM NOTE: This Altura Photo filter set is compatible with all 67mm lenses. Please verify your camera's lens thread size before ordering.67MM Altura Photo Neutral Density Professional Photography Filter Set (ND2 ND4 ND8)Altura Photo's Neutral Density filters are an essential addition to any photographer's arsenal. These simple yet powerful filters can dramatically improve your shots. Use ND filters to emphasize motion, or to make busy scenes appear surreal and calm. ND filters allow you to use larger apertures in bright light for a shallower depth of field, or achieve sharper photos.Features:- High-quality optical design set inside a lightweight aluminum frame.- ND filters reduce the amount of light passing through the camera lens without any loss of color quality or sharpness.- Eliminates overly bright washed-out images- Enables you to use longer exposure times to emphasize movement for a more artistic effect.- Allows you to use larger lens openings in bright light to achieve a shallower depth-of-field.- Stack multiple filters for an even greater effect.- Includes a tri-fold protective pouch for storage and protection.Filter Strength:- ND2 reduces the exposure by 1-full stop- ND4 reduces the exposure by 2-full stops- ND8 reduces the exposure by 3-full stopsCompatibility:Compatible with all lenses featuring a 67mm front filter thread including:- e.g. Tamron 16-300mm f/3.5-6.3 Di II VC PZD MACRO- e.g. Nikon AF-S NIKKOR 70-300 F/4.5-5.6- e.g. Nikon AF-S NIKKOR 18-140MM F/3.5-5.6- e.g. Canon EF-S 18-135mm F/3.5-5.6 STMPremium MagicFiber Microfiber Lens Cleaning Cloth included with your order.Ultra-gentle! Extremely fine microfiber leaves zero scratches, streaks or marks. Safe for all lenses.