IDAS filters and drop-in adapters sold by David Astro are covered by a manufacturer's warranty from ICAS Enterprises (IDAS, Tokyo, Japan).
IDAS Warranty
IDAS Filters 3-Year Warranty
The mechanical function and optical performance of IDAS filters and adapters are guaranteed for 3 years from the date of purchase under normal use. This warranty is void if the product has been misused or damaged.
If IDAS finds a filter substrate defective, the filter is replaced free of charge or refunded.
How to make a claim
Email us at support@davidastro.com with your order number, a short description of the problem, photos of the filter and its serial number (on the label of the plastic case). We handle the claim with IDAS for you.