Thanks for entering the #44 and #45 logo. #45 logo's car is cute but too assuming. I prefer #44 over your #45. Moving the circle / lens design element over to the letter "a" is better I think than in the middle. Im still unsure though about the lens. Thx for placing the "motorsport photography" in the logo.
#48 - I think the "i" is lost in the design element of the circular lens. #49 - although it's a cleaner design - the word 'images' does not stand out, its not bold enough, striking enough, strong enough to be kept in memory.
#52 - Im not a fan of the checkered flag. I also think the car may be too obvious of an icon. I have seen the lens ( in the wheels ) used in other designs. So I am drawing away from the use of any image of that look of a lens.