We present CCD photometry for the Galactic globular cluster NGC 4833 .
Our BVI color magnitude diagrams ( CMD ) extend from above the red giant branch ( RGB ) tip to several magnitudes below the main sequence turnoff .
The principal sequences of the cluster show the effects of differential reddening .
We have created a local extinction map , consistent with IRAS and COBE/DIRBE dust maps of the region .
We use our map to correct the colors and magnitudes of each star to the value at the cluster center .
The cluster horizontal branch ( HB ) is predominately blueward of the instability strip with 13 confirmed RR Lyrae variables and 5 additional RR Lyrae candidates .
Using the 11 confirmed RR Lyraes measured on our images , and the differential reddening corrected photometry we calculate V ( HB ) = 15.56 \pm 0.063 .
We have used the simultaneous reddening and metallicity method of Sarajedini ( 1994 ) to find the mean reddening of the cluster E ( B - V ) = 0.32 \pm 0.03 , and the mean metallicity [ Fe / H ] = -1.83 \pm 0.14 .
As for the age of NGC 4833 , we find provisional evidence that NGC 4833 is 2 \pm 1 Gyr older than the average of M92 and M5 .
A more definitive conclusion must await higher resolution imaging of the cluster core where the effects of differential reddening are minimized .