Personal review on the following:
Sigma 18-35mm DC HSM (Canon mount)
https://witonosfreestyle.wordpress.com/2013/09/09/hands-on-review-on-sigma-18-35mm-1-8-dc-hsm/
Sony Xperia Z smartphone camera
https://witonosfreestyle.wordpress.com/2013/10/23/photography-with-sony-xperia-z-review/
Photography with a $20 cctv lens 25mm 1.4
https://witonosfreestyle.wordpress.com/2013/11/27/photography-with-a-20-cctv-lens-25mm-1-4/
Lomography Fisheye Adaptor
https://witonosfreestyle.wordpress.com/2016/05/27/review-of-lomography-fisheye-adaptor-standard/