dimento
9-May-2014, 03:27
I recently bought a Copal 3 lensboard from an ebay seller I had used in the past. The board was for my Calumet C1, so a basic 6x6 board with lip on rear (like Deardorrf) and it had a recess cut for a flange or retaining ring.
The board has been a disaster, I had to sand it to fit the C1 as it was too thick, and today when I fitted my schneider 300mm symmar S lens, I discovered that the copal 3 hole is a few mm too big.
This means I can't use the retaining ring the correct way round because it just fits straight through the hole in the board.
I got around this temporarily, by inverting the ring and when it's turned wrong-way-round there's a slight lip at the top which is just wide enough to grip the inside of the board-just. But this means I had to hand tighten the ring rather than using a spanner, as there are no spanner holes on the 'wrong' end, and the whole thing is a little unsatisfactory and unstable.
Can anyone suggest a solution via a flange or space of some kind, and perhaps point me to where I can find one? I have posted a wtb for a proper C1 board, but in the meantime I need a fix to put my mind at rest.
I seem to remember with another schneider lens I had, that there was a second cylindrical 'spacer' which the retaining ring fitted in which, I imagine would do the trick.
Thanks, D..
The board has been a disaster, I had to sand it to fit the C1 as it was too thick, and today when I fitted my schneider 300mm symmar S lens, I discovered that the copal 3 hole is a few mm too big.
This means I can't use the retaining ring the correct way round because it just fits straight through the hole in the board.
I got around this temporarily, by inverting the ring and when it's turned wrong-way-round there's a slight lip at the top which is just wide enough to grip the inside of the board-just. But this means I had to hand tighten the ring rather than using a spanner, as there are no spanner holes on the 'wrong' end, and the whole thing is a little unsatisfactory and unstable.
Can anyone suggest a solution via a flange or space of some kind, and perhaps point me to where I can find one? I have posted a wtb for a proper C1 board, but in the meantime I need a fix to put my mind at rest.
I seem to remember with another schneider lens I had, that there was a second cylindrical 'spacer' which the retaining ring fitted in which, I imagine would do the trick.
Thanks, D..