Ega, Got your concepts. Like a lot about all three of them. I appreciate your keeping it simple. That being said, here are my comments.
#23 is my favorite. Like the overall design, like camera. I feel though it needs more color. Here is the issue. In the States we have a holiday named Halloween. Don't know if you are familiar with that but the colors for that holiday are black and orange. I would like to avoid that.
So, first the orange -- I don't know if you saw my notes to some other designers but the orange should really be a burnt orange or rust color, like the color of the Golden Gate Bridge in San Francisco. This color works extremely well with blue.
Blue (a medium blue). I would like some blue in the design, perhaps the camera lens could be blue with white letters for the acronym. And if you go with this then I would lose the effect that the lens is projecting the initials and just put the acronym right on the lens.
Or you could use the blue spelling out the company name in the burnt orange colored box next to the camera. Or use blue in both places
I like very much where you are headed with this but feel that right now it is just too static. I am hoping the introduction and combination of the blue with the burnt orange color will add a little vibrancy.
I hope all of this makes sense. Great first attempt on your part. Looking forward to seeing more.
Best, John