One of the major differences appears to be that the R62 has a 43mm filter diameter (for adding filters and attachment lenses) whereas the R52 does not have one The other noticable difference is in the size and weight of each and the included battery.
R52:
| Dimensions (WxHxD) | 2.1 x 2.2 x 4.6" / 53.0 x 57.0 x 116.0 mm not including grip belt |
| Weight | 8.3 oz / 235 g camera body not including grip belt
10.1 oz / 286 g including BP-718 battery, memory card and grip belt |
| Filter Diameter | Not Supported |
R62:
| Dimensions (WxHxD) | 2.1 x 2.3 x 4.6" / 53.0 x 58.0 x 116.0 mm not including grip belt |
| Weight | 8.47 oz / 240 g camera body not including grip belt
10.93 oz / 310 g including BP-727 battery, memory card, and grip belt |
| Filter Diameter | 43mm diameter |
