The SRB 46-37mm Step-down Ring steps a 46mm lens thread down to a 37mm thread, making it suitable to attach a 37mm filter to a 46mm lens for example.

highlights

• Steps a 46mm lens thread down to a 37mm thread
• Features a 3mm deep male thread and 3mm deep female thread
• Made from high grade aluminium and anodised black

Step rings are handy if you have many lenses with different sized threads. Instead of purchasing multiple filters and accessories to fit these lenses, a Step Ring could be an inexpensive choice.

This step ring has a 3mm male thread and a 3mm female thread, making the overall width to be 6mm. For more information, check out our Guide to Using Step Rings.