Welcome!
Thank you for your interest in attending the 2026 NIST Photometry Short Course, to be held at NIST, 100 Bureau Drive, Gaithersburg, Maryland 20899.
Refund Policy
Refunds are available until October 3, 2026. After this date, any registration changes and refund requests will be handled on a case-by-case basis. Please send all refund requests to
Please note: If you are registering to attend in-person at an event held at either a NIST, NCCoE, DoC or any other federal facility: These facilities are controlled-access facilities, and you will be asked a few additional questions prior to your arrival to process your registration. Attendees who do not complete the pre-arrival questions will not be permitted to enter.
Registration for in-person attendance closes on October 19, 2026.