Quote: Catsman50: I have a 50mm f/2.0 and was wondering if it actually worth spending the 40$ to get the 1.7? is it that much better or should I look into buying something else. any suggestions are greatly appreciated! looking to not spend more then 50$ on a prime lens!
I suggest buying the M 50mm 1.7, then selling the 50mm f2, especially if you use the lens a lot at wider apertures. Like Marc says, you can sometimes pick up the 1.7 for under $30. I have owned and shot with the following Pentax primes on the K20 crop sensor
A 50mm 1.7
Auto Tak 55mm f 1.8
Super Tak 50mm 1.4
M 50mm 1.4
M 50mm 1.7
M 50mm 2.0
67 55mm f4
My favorite one, for more reasons than one, is the M 50mm f 1.7