3fr File extension 3fr is basically associated with an occupancy of Hasselblad devices used in the format of digital photography. The 3fr format is made up of the several Raw formats. It plays a similar role in digital systems as the negatives do in film photography. It comprises of aerial resolution of the digital photo along with meta-data. The raw image file like 3fr has a lot of benefits to a JPEG file, it has greater image attribute. All the transitions made on digital negatives are nondestructive. But its drawback is that its size is almost 2 to 6 times larger than JPEG file.
png PNG stands for portable network graphics. It is the raster graphics format associated with the .png filename extension. Unlike GIF format, the limitation of 256 colors does not hold with the PNG format. In fact this among other reasons was the motivation behind development of the PNG format to improve upon the GIF format. The PNG format however uses a single image format and thus does not support animations. Because the format was engineered to ease the distribution of graphic files across computer networks it is also not well suited for professional graphics.