The Welta Solida is a medium-format folding rollfilm camera produced by the German maker Welta. It belongs to the era of bellows-style folders aimed at amateur photographers seeking a pocketable camera capable of larger negatives than 35mm.

At UK auction today the Welta Solida trades at modest hammer levels, with a recent sale recording £19 at saleroom level — wholesale pricing that excludes commission. With only one tracked result, this figure is indicative rather than a reliable median, and the price a clean, working example sells for can vary with bellows condition and shutter health.