Stack cap
In photography, stack caps are end pieces with the same threading as corresponding size lens filters. This way filters can be stacked, sealed and packed with a minimum of bulk. The downside of this solution is that it can be fiddly.
In photography, stack caps are end pieces with the same threading as corresponding size lens filters. This way filters can be stacked, sealed and packed with a minimum of bulk. The downside of this solution is that it can be fiddly.