I am a beginner to DSLR photography and newby to this group. I recently bought a Nikon 7000 camera with 18-200 lens. That's all I have for moment. I have spoken to people and also researched a lot and been advised that everyone should have a prime lens in their camera bag. Would it be beneficial to have one? I have been looking at the 35mm 1.8g as feel 1.4g is far too expensive. Should I get a 50mm as well? If so, what is the difference between 1.4g and 1.8g. I understand that DX primes are magnified 1.5 x there making the 35mm the old 50mm and the 50mm a 75mm. Am totally confused here as to which one would be the better one to get or should I get both. I enjoy low light sunrise/sunset shots, close ups i.e. flowers, people and zoo animals and trying to venture into landscape. Currently no specific type yet. I hope some one can advise or help with which would be the best prime to get.