I hope to be photographing real estate properties for sale in early 2017. I have a question regarding wide-angle lenses. I have read a lot of your posts, responses and reviewed your list of suggested lenses. My current budget is low and I wonder what your thoughts are on the 52MM 0.43x Altura Photo Professional HD Wide Angle converter to use with my Nikon D3300 to convert my 18-35mm lens to a wider angle lens?
The 52MM 0.43x Altura Photo Professional HD Wide Angle converter is very poor quality! For $30, you get what you pay for. You can see from the reviews and samples on Amazon this wide-angle converter has problems.
My recommendation is that you go with the Sigma 10-20mm. A few photo shoots will pay for it. It is important that if you are going to do quality work that you have a quality wide-angle zoom lens! A quality wide-angle is the most important piece of gear a real estate photographer has. You can probably find a used Sigma 10-20mm for around $290. Here's one on Amazon for $284.