The 7th Voyage of Sinbad

The 7th Voyage of Sinbad is a 1958 Technicolor fantasy film from Columbia Pictures, produced by Charles H. Schneer, directed by Nathan H. Juran, and starring Kerwin Mathews, Torin Thatcher, Kathryn Grant,Richard Eyer, and Alec Mango. This was the first of three Sinbad feature films from Columbia, the much later two being The Golden Voyage of Sinbad and Sinbad and the Eye of the Tiger. All three Sinbad films were conceptualized by Ray Harryhausen who used a full color widescreen stopmotion animation technique he created called Dynamation.

While sailing the Persian Gulf, legendary adventurer Sinbad the Sailor Kerwin Mathews and his crew find the island of Colossa, where they encounter Sokurah the magician Torin Thatcher, fleeing from a giant cyclops. While they escape with their lives, Sokurah loses a magic lamp to the monster. Despite his desperate pleas to Sinbad to return him to the island, Sinbad refuses, since he is carrying Princess Parisa Kathryn Grant aboard, with whom he has fallen in love their marriage is meant to secure peace between her fathers realm and Sinbads homeland Persia.After reaching Bagdad, the wedding is prepared, and Parisas father Harold Kasket arrives as the main guest of honor. Sokurah is asked to perform his magic at the prewedding festivities, but despite his prowess the Caliph of Bagdad Alec Mango refuses to grant the magician his wish to be returned to Colossa. Later that night, Sokurah secretly shrinks Parisa to diminutive size, enraging her father to the point that he declares war on Bagdad. Facing this crisis, Sinbad and the Caliph finally give in to Sokurah, who explains that the main ingredient for releasing Parisah from her curse, the eggshell of a Roc, can be found only on Colossa. In order to alleviate their fears of the giant monsters on the island, Sokurah provides them with the construction plans for a giant crossbow. ........

Source: Wikipedia