Tiffen 5.65"x 5.65" Clear Filter. This filter is used primarily to protect the front element of any lens, especially when subjecting it to blowing dirt, dust, rain, squibs and pyrotechnics. Most astute camera assistants will always have a clear filter or optical flat in their filter case. CAT
Prop65 WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
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