Help Plaubel Peco Profia TTL Metering Attachment

[Nokton48]

Plaubel Peco Profia TTL Metering Setup by Nokton48, on Flickr

This is a 1970s-vintage Plaubel Peco Profia TTL Metering Attachment, with the appropriate fully functioning Gossen Luna Pro. The meter is reliable and appears to be working perfectly.

This attachment goes onto a Plaubel Peco Profia Bag Bellows Viewer, which attaches behind the ground glass. To meter through the camera, you first press the black metal tube (on the right side in the photo) onto the ground glass, you can see the glass highly magnified, and select an area to be metered. The push all the way in the long silver rod on the unit, and activate the Luna Pro with it's rocker switch, to take and lock in a light reading.

Is anybody here familiar with this unit? I would like some help in getting accurate exposure readings with this unit.