Due to large deformations, strain measurement in hyperelastic soft material has always been challenging. While extensometers cannot be mounted due to the material’s large compliance, it is challenging to employ non-contact strain measurement techniques due to its highly non-linear strain characteristics. Besides, synchronizing load cell data with the strains, especially when they are measured by optical methods, adds to the experimental complexity. In this investigation, the deformation characteristics of vulcanized natural rubber reinforced with varying carbon black contents are investigated. Three-way synchronization between the load, strain and optical image is realized using a load cell, strain rosette and Complementary Metal-Oxide Semiconductor (CMOS) camera. The Digital Image Correlation (DIC) technique is employed for non-contact strain measurement. The accuracy of the optically measured strain is first ascertained by comparing it with the synchronized strain gauge data. A separate quasi-static uniaxial tension test is performed on an epoxy calibration sample for this validation. The National Instruments (NI) data acquisition (DAQ) modules and the LabVIEW software are used for the measurements. Next, the vulcanizate specimens are subjected to uniaxial tension tests, up to 70% nominal strain. The load cell synchronized optical images are processed through DIC to evaluate the material’s strain distribution. The stress versus stretch data is plotted, and the effect of carbon black content on the material’s mechanical characteristics is assessed. Experiments are also conducted on single-edge notch tension (SENT) specimens of the vulcanizates to exhibit the robustness of the developed synchronized measurement technique in evaluating the strain field near the crack tip.