My camera is always set on manual mode, if your camera is on auto and you photograph into the sun you will most likely get underexposed images.
When shooting into the sun your meter will underexpose the scene (the histogram will be way too far to the left). Photographing into the sun is a great way for you to learn to take control of your camera.
If you are after a warm glow around the sun then photographing at sunrise or sunset are the best times to achieve this.
Set the aperture you are after and meter for the scene without the sun in the frame as a starting point. Keep this meter reading then shoot with the sun in the shot and see how this looks.
For the shot above of the temples of Bagan in Myanmar I wanted to leave some detail in the silhouetted temples whilst giving a very warm feel to the image. You can try different exposures using the exposure compensation dial to see how the different exposures will look. The camera was mounted on my tripod and I focussed the scene manually, then avoided looking directly through the eyepiece to save my eyes from any damage. Between shots I put the lens cap on too. To avoid flare it is best to remove any lens protection filters you might have on your lens.
If you are after a bright burnt out sun with blue sky then shooting around mid day can ahieve this, though this one is much harder on the eyes, so be careful. The shot below of the Allium Purple Sensation against the sun I wanted to convey the feeling of nature bursting into life with the power of the sun in summer. For this the sun had to be overhead with me lying on the ground. This shot was harder to achieve as I was hand holding and having to focus on the allium and meter.
The backlit flower against the sun shows off its shape and form and the colour of the petals is accentuated. In this shot the sun is more burnt out and there is flare which adds to the feel of the power of the beating sun.
When taking these type of shots please be careful of your eyes, you don`t want to damage them.
I am leading travel photography holidays and tours in 2016 and 2017 to Burma (Myanmar), Vietnam and Cambodia. Details can be found on the Digital Photography Holidays website; http://www.digitalphotographyholidays.com