Thanks to all for your guidance,
Finally, I bought the 35mm f1.8g DX. I waited for the FX version but it was 3 times more expensive than DX one. Since I thought I can't make it to buy a full frame in near future, I decided to buy the DX version at the moment. To me, it's a very good walk-around lens. It's sharpness and quality are quiet satisfying.
- Merco_61 likes this