https://community.usa.canon.com/t5/Camera-Accessories/Old-Canon-Drop-in-Neutrl-Density-Fitler-Kit/m-p/426699#M1419 <P>Does anyone know what the model number of this kit is or any of the specifications such as accuracy of the attenuation or the wavelengths over which the ND filter work?&nbsp; It must be 30 years old. The drop ins are 3 x 33mm with a 29mm lens.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="DrBill_0-1688663640912.png" style="width: 400px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/43414i58278E59C57CE342/image-size/medium?v=v2&amp;px=400" role="button" title="DrBill_0-1688663640912.png" alt="DrBill_0-1688663640912.png" /></span></P><P>&nbsp;</P> Thu, 06 Jul 2023 17:15:39 GMT DrBill 2023-07-06T17:15:39Z https://community.usa.canon.com/t5/Camera-Accessories/Old-Canon-Drop-in-Neutrl-Density-Fitler-Kit/m-p/426699#M1419 <P>Does anyone know what the model number of this kit is or any of the specifications such as accuracy of the attenuation or the wavelengths over which the ND filter work?&nbsp; It must be 30 years old. The drop ins are 3 x 33mm with a 29mm lens.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="DrBill_0-1688663640912.png" style="width: 400px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/43414i58278E59C57CE342/image-size/medium?v=v2&amp;px=400" role="button" title="DrBill_0-1688663640912.png" alt="DrBill_0-1688663640912.png" /></span></P><P>&nbsp;</P> Thu, 06 Jul 2023 17:15:39 GMT https://community.usa.canon.com/t5/Camera-Accessories/Old-Canon-Drop-in-Neutrl-Density-Fitler-Kit/m-p/426699#M1419 DrBill 2023-07-06T17:15:39Z