Amazon.com : 72mm Variable Fader ND2-ND32 ND Filter and CPL Circular Polarizing Filter for Tamron SP 35mm f/1.4 Di USD : Electronics
67mm NDX Variable Range Neutral Density Fader Filter Adjustable from ND2 - ND1000 for Tamron SP AF 17-50mm f/2.8 XR Di II LD - Walmart.com - Walmart.com
ND Filter 52MM, K&F Concept Professional 52MM ND2 to ND400 Fader Variable Adjustable ND Neutral Density Lens Filter + | Walmart Canada
graduated ND filter for Tamron 17-50: Accessories Talk Forum: Digital Photography Review