Extended ISO range is a completely artificial, conjured up set of ISO values that are purely created by the camera’s software manipulations. When actually used to take an image, the camera uses the highest native ISO value available and then boosts the exposure using the camera’s image processor.
The 35mm lens is undoubtedly a great contender for your travels photography needs. Not only is the lens small and light, it is as versatile as you would want it to be.
If we allow the automatic systems of the camera to run, it would definitely cause the image to wash out. To properly expose for a silhouette photograph…
The basic principle of fireworks shooting is, secure the camera the best you can and then keep the shutter open only till you see the crackers. That is all