This STL file provides a 3D printable design for a viewfinder cover compatible with Canon EF cameras. The cover is specifically designed to aid in long exposure photography, a technique often used in low light conditions, astrophotography, or to create special effects such as 'smoothing' moving water.
The viewfinder cover helps to prevent stray light from entering the viewfinder and affecting the exposure, which can be particularly problematic during long exposures. It's a handy accessory for photographers who frequently use long exposure techniques and want to ensure the highest quality results.
In addition, this cover can be a useful companion to a neutral density filter, which is often used to extend exposure times, especially in reasonably lit conditions. The combination of the viewfinder cover and a neutral density filter can provide a comprehensive solution for managing light during long exposures.

I printed with PETG, 100% infill, and supports.