![Ron Martinsen's Photography Blog: COMPARISON: Variable Neutral Density Filters (Singh-Ray, B+W, Hoya, Tiffen & Bower) Ron Martinsen's Photography Blog: COMPARISON: Variable Neutral Density Filters (Singh-Ray, B+W, Hoya, Tiffen & Bower)](http://ronmart.smugmug.com/Blog/Reviews/RediPix-Print-9-Edit/859748861_jJtHL-M.jpg)
Ron Martinsen's Photography Blog: COMPARISON: Variable Neutral Density Filters (Singh-Ray, B+W, Hoya, Tiffen & Bower)
![Ron Martinsen's Photography Blog: COMPARISON: Variable Neutral Density Filters (Singh-Ray, B+W, Hoya, Tiffen & Bower) Ron Martinsen's Photography Blog: COMPARISON: Variable Neutral Density Filters (Singh-Ray, B+W, Hoya, Tiffen & Bower)](http://photos.ronmartblog.com/img/s5/v132/p1060052171.jpg)
Ron Martinsen's Photography Blog: COMPARISON: Variable Neutral Density Filters (Singh-Ray, B+W, Hoya, Tiffen & Bower)
![Ron Martinsen's Photography Blog: COMPARISON: Variable Neutral Density Filters (Singh-Ray, B+W, Hoya, Tiffen & Bower) Ron Martinsen's Photography Blog: COMPARISON: Variable Neutral Density Filters (Singh-Ray, B+W, Hoya, Tiffen & Bower)](http://static.bhphoto.com/images/images500x500/813278.jpg)
Ron Martinsen's Photography Blog: COMPARISON: Variable Neutral Density Filters (Singh-Ray, B+W, Hoya, Tiffen & Bower)
![Amazon.com : Hoya 77mm Variable Density Screw-in Filter : Camera Lens Neutral Density Filters : Electronics Amazon.com : Hoya 77mm Variable Density Screw-in Filter : Camera Lens Neutral Density Filters : Electronics](https://m.media-amazon.com/images/I/517aV9O7qsL.jpg)