The SHELS ( Smithsonian Hectospec Lensing Survey ) is a complete redshift survey covering two well-separated fields ( F1 and F2 ) of the Deep Lens Survey .
Both fields are more than 94 % complete to a Galactic extinction corrected R _ { 0 } = 20.2 .
Here we describe the redshift survey of the F1 field centered at R.A . _ { 2000 } = 00 ^ { h } 53 ^ { m } 25.3 ^ { s } and Decl . _ { 2000 } = 12 ^ { \circ } 33 ^ { \prime } 55 ^ { \prime \prime } ; like F2 , the F1 field covers \sim 4 deg ^ { 2 } .
The redshift survey of the F1 field includes 9426 new galaxy redshifts measured with Hectospec on the MMT ( published here ) .
As a guide to future uses of the combined survey we compare the mass metallicity relation and the distributions of D _ { n } 4000 as a function of stellar mass and redshift for the two fields .
The mass-metallicity relations differ by an insignificant 1.6 \sigma .
For galaxies in the stellar mass range 10 ^ { 10 } to 10 ^ { 11 } M _ { \odot } , the increase in the star-forming fraction with redshift is remarkably similar in the two fields .
The seemingly surprising 31-38 % difference in the overall galaxy counts in F1 and F2 is probably consistent with the expected cosmic variance given the subtleties of the relative systematics in the two surveys .
We also review the Deep Lens Survey cluster detections in the two fields : poorer photometric data for F1 precluded secure detection of the single massive cluster at z = 0.35 that we find in SHELS .
Taken together the two fields include 16,055 redshifts for galaxies with R _ { 0 } \leq 20.2 and 20,754 redshifts for galaxies with R \leq 20.6 .
These dense surveys in two well-separated fields provide a basis for future investigations of galaxy properties and large-scale structure .

Key words : cosmology : observations – galaxies : abundances – galaxies : distances and redshifts –galaxies : evolution – large-scale structure of universe – surveys