The DLS cosmic shear paper (Jee et al) has been accepted. This paper provides a joint constraint on the cosmological parameters Ωm ( 0.262 ± 0.051 ) and σ8 (0.868 ± 0.071). Combining the current results with the Wilkinson Microwave Anisotropy Probe 7 year (WMAP7) likelihood data, we obtain Ωm = 0.278 ± 0.018 and σ8 = 0.815 ± 0.020. This paper also includes a section demonstrating the power of a deep survey vs a shallower CFHTLS-like survey for constraining cosmic shear. A second paper in preparation uses tomography (the redshift dependence of cosmic shear) to constrain dark energy.