I'm writting from Guarulhos, Brazil, a city near Sao Paulo. Light poluition is level 5. It's a great diagonal. I tried use it in a small acromatic refractor 90 F/d 10.1. I get very good imagens from Jupiter and I could see its equatorial zones. Split binary stars became easy. The performance of refractor 90 with that diagonal is similar a refrator 100 or 102 with ordinary diagonals. Using this diagonal in others telescopes with several appertures the performance was very improved too. Excelent balance between cost and benefits.
Excellent diagonal for the price.