What is the "Umbra shield" ?
What is the "Umbra shield" ?
Moderators: rjlittlefield, ChrisR, Chris S., Pau
Dziekuje ! Kind a http://www.photomacrography.net/forum/v ... 419#237419 ...JohnyM wrote:Nothing special. Piece of metal. I just use leftover m42 tubes for that purpose.