2nd lens - nx300m

So, I'm looking to get my 2nd lens as i currently only have the 18-55mm OIS and i would like something lighter as to fit my camera in to my pockets. I use my camera mainly forlandscape and street photography and the occasional indoor shot.
Mainly I've been looking at the 30/2.0, the 20/2.8 and the 16/2.8 primes. 
As I'll only be able to buy one, i'd like som feedback on the different lenses, aswell as your thoughts. I'm also open to other suggestons

Thanks

I have the same nx300m with 18-55mm and got 20mm as my second lens, mainly due to 30mm being to narrow for me and my wife and landscape when we travel. I would get  the 16mm, wider and faster, but it's said that it have some distortion.

30mm can be a little narrow for indoor shooting, but it's a superb lens and may be better for your needs

Now I'm thinking about my third lens, can't decide between 45mm, 30mm or 50-200mm.

Sounds like the same position I was in. My first prime was the 30mm, then the 20mm, then the 16mm. I now use the 16mm and the 30mm the most. For wide landscapes it is very simple to shoot multiple photos with the 30mm then stitch them in Microsoft ICE, when I don't have the 16mm on camera.

Markedouard wrote:

So, I'm looking to get my 2nd lens as i currently only have the 18-55mm OIS and i would like something lighter as to fit my camera in to my pockets. I use my camera mainly forlandscape and street photography and the occasional indoor shot.
Mainly I've been looking at the 30/2.0, the 20/2.8 and the 16/2.8 primes.
As I'll only be able to buy one, i'd like som feedback on the different lenses, aswell as your thoughts. I'm also open to other suggestons

Thanks

Based on the needs you listed, I'd get the 16mm. The 30mm is an outstanding "normal" lens but you have that covered with the 18-55. Same with the 20. The 16mm is wider than what you have and would work well for landscapes, street, and, since it's 2.4, decently in lowlight.

Kind of a no brainer... definitely go with the 30mm lens.

Having said that I don't have experience with the other pancakes.  I just have the 45 and 30 as well as the 18-55.  30 stays on my nx300 at all times unless I'm doing portraits or video.

Only drawbacks to me is focus speed.  Not terrible, but shooting a toddler is rough.

I think the 30 is great for street shooting.  the 16 and 20 are probably better for landscape.  But you can test this yourself very easily by setting your 18-55 to the different focal lengths.