In this work, we present an easy wavelength-tunable passive mode-locked fiber laser with a semiconductor saturable absorber mirror as a mode-locker. The cavity includes a Lyot filter as a wide wavelength-tunable filter that can be tuned by simply increasing the retardance of a variable wave retarder. The Lyot filter consists of the variable wave retarder and highly birefringent fiber inserted between two linear polarizers oriented at the same angle. The highly birefringent fiber has 8.196 cm length and linear birefringence ∆n=4.805x10−4 which provides a 61 nm period. Continuous mode-locking was experimentally achieved from 1561.9 to 1546.1 nm by simply increasing the retardance from 0.0778π to 0.4778π rad delivering sub-ps pulses width at 10.57 MHz repetition rate.