I purchased a Nikkor 50mm 1.8G Lens for my camera and wanted to test the advantages and disadvantages to having a prime lens. I've been so used to Zoom Lenses that I wanted a challenge. Quite obviously, the need to move around to frame your subject, rather than relying on your lens's zoom capabilities is number 1. I've read many articles and testimonials regarding using a 35mm or 50mm prime lens on an APS-C body because of the crop factor. Naturally you would think to use a 35mm because you'll get around 52mm in actual focal length, but many have said that the 50mm produced sharper images and a better shallow depth of field. I took these test shots using the 50mm and my walk-around 18-140mm 3.5/5.6 lenses. 50mm f1.8 f1.8 1/30 sec. ISO-800 Focal Length @50mm 35mm Focal Length @75mm (Crop factor) 18-140mm 3.5/5.6 F5 1/10 sec ISO-3200 Focal Length @75mm 35mm Focal Length @112mm (Crop factor) Trying to match the exposure settings for each lens to get a similar output, you can see (in the picture itself) that it was more of a struggle to match the settings of the 50mm using the 18-140. Lowering the shutter speed, and increasing the ISO, I bent down on my knees to take this shot and I tried to stay still as long as possible. With the 50mm under low light conditions, it was much easier to take a shot in the same position with a faster shutter speed and an ISO of only 800. You can also see the difference in background blur between the two lenses. The 50mm 1.8 for the price can really isolate a subject when taking shots, pretty good for portraiture, but that's not my cup of tea. I would more than likely use it for a walk-around, and floral shots.