What are the advantages of a prime lens and lower f stop number?
I recently purchased a Nikon D3100 with the kit lens and a 55-200mm lens.
However, a friend recommended that I invest in a prime lens with a higher aperture value.
If I were to buy one I think I would be purchasing the AF-S 35mm 1.8
However, I was wondering what the real advantage of this lens would be?
What are the advantages of any prime lens? What are its practical uses?
Also, what are the real advantages of a lower f stop number?
I know a lower f stop number will create a more shallow depth of field, but would this make a drastic difference in the final image in comparison to the 3.6 available on my kit lens?
If someone could clarify on this topic, I would greatly appreciate it.
Also, if there are any other differences, feel free to make mention of them. I am really getting into photography recently and wouldn't mind learning something new. :]
Thanks in advance.
As well as allowing a greater depth of field than your kit lens, the wider aperture will allow more light in, which will in turn allow for shooting on lower light conditions. There is a big difference between f1.8 and f3.5 - that's over 2 stops more light.
Prime lenses tend to be better optically as its easier to construct a non-moving lens system.
I would recommend the 50mm f1.8 as your first prime - ideal general & portrait lens. You just have to remember to 'zoom' with your feet!
Using Depth of Field in Digital Photos For Dummies
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