Power Struggle with Samsung Galaxy S3

Right after I got a Samsung Galaxy S3, I came to a realization that I'm practically tethered to a USB cable - a freshly-charged battery would last at most 10-12 hours. I bought an external battery, just for my own peace of mind and as well to convince myself that I actually do have a mobile phone. However, the external battery and cables turned out to be a lot bulkier than I thought and I decided to figure out what's wrong with the phone.

M vs. Av and Tv

Manual exposure mode (M) is often perceived as a mode that only most advanced photographers can use. While it is true that manual mode will immediately highlight any exposure errors, which is why it is also often used in photography schools to teach how exposure works, manual mode also provides some advantages when compared to aperture priority (Av) and shutter priority (Tv) modes. Let's take a closer look.