sinar db lens? db board?

[great]

is db lens means sinar digital lens?

and db board is only for db lens?

if i have sinar p and old schneider 150mm lens, can i use db board?

[LF_rookie_to_be]

DB boards (#0,#1 and #3) have the same threads as #0,#1 and #3 shutters and you just screw in the lens elements to them as you would onto a shutter - but there is no shutter in there. The board also has an aperture but it can only be controlled manually on some boards, which are called "DBM". So if your 150mm Schneider is mounted in a shutter, you need a standard, non-DB(M) Sinar board. "DB" stands for "DruckBlende", and what it means is that you use a Sinar Copal Shutter behind the lens, which is what these board were made for.