- Light source and lamp
- An opal bulb in the round lamphouse shines through one condenser lens that lowers onto the film. Leitz's 1952 English manual names a 75 W opal lamp and a later German edition a 150 W one, and both say the lamp must suit your mains voltage. Ask what's fitted and for a photo of it lit. Kienzle in Germany still lists Ic parts, including halogen lamps for its mixing-box conversion.
- Carriers and condensers
- Leitz supplied a 24x36 film slide, where the condenser presses the strip flat, and a single-negative mask with a hinged double glass plate. Extra slides took 3x4 and 4x4 cm, and a NEWOO pressure frame fits under the condenser to stop Newton's rings. Check the photos for the slide and the mask with its glass. Kienzle makes replacement film stages and metal masks.
- Column and bellows
- There's no bellows. The head rides a parallelogram arm on one column and the lens focuses in a helical mount. Press the handle and the head moves, and it clamps itself when you let go. Leitz says a self-clamp that slips with age is tightened at the brake bolt, so ask for a video of the head being moved and released.
- Alignment
- What drifts is the focus tracking. Leitz sets the cam at about 10x and 2.5x and confirms it with three test prints. Ask the seller to focus near the top of the arm and show the image still sharp near the bottom without touching the lens.
- Lens
- It shipped with the 5 cm Focotar f/4.5, set at the works so the cam tracks it. A Leica Elmar 5 cm or Summitar works after the cam is reset for it, and Leitz says any other lens needs the same adjustment. Check the listing names the Focotar and ask whether the cam has been reset. A dealer notes most other screw-mount enlarging lenses also need Leitz's extension tube.
- Timer and power
- It runs straight off the mains with a switch on the side of the baseboard and a socket on the column foot for an exposure timer. The bulb has to match your mains voltage, so a European Ic may need a different lamp in North America. Budget for a timer if one isn't included.
- Shipping and pickup
- We couldn't find a published weight. Thomas Eisl, who has owned both, calls the Ic much smaller and lighter than the IIc. Leitz packed it as baseboard, column and head with its arm, and the arm and head are what get damaged. Ask how it'll be packed, or pick it up.
Check the listing photos against these lists, and ask the seller about anything you can’t see. A missing carrier, condenser or lens board should come off the price.