I picked up a used Nikon D80 last week to start my adventure in to the world of DSLRs. The D80 came with a Nikkor AF 35-70mm F3.3, and a Tamron AF 18-200mm F/3.5-6.3 XR Di-II LD. Since then I have been reading Scott Kelby's Digital Photography books and have been learning a lot, but now I find myself interested in buying a prime lens. I have been taking test shots with the lens that I have now and I just find that in low light conditions the lens are not fast enough. Also I want to have a sharper lens. I have been looking into the Nikkor AF 50mm f1.8D, but the Nikkor 35mm F1.8 DX is also interesting. I admit I am new to photography but from my understanding the 50mm on my D80 would be a 75mm due to the crop factor. That seems a little limited, I am looking for a fast lens that I can use indoors in places were flash is not acceptable. I will be traveling a lot this year and would love to have a prime lens to use in addition to my zoom lenses. I am leaning towards the 35mm because it seems like I can use it more because it is a wider lens, its rare in indoor situations that I can't walk closer. I worried that in cramped places I might not have the ability to get enough room away from the subject to use the 50mm. The 50mm is going for $100 used and $130ish new with warranty, while the 35mm DX is going for around $200-240 new. Should I save my money and go with the 50mm or should I just spring for the 35mm DX? I have considered getting a SB600 but I feel like I would use the prime more since I can foresee limited use of the flash due to other people and restrictions.