I just got me a 180MM KO lens for my Koni Omega 100.

At first I thought the shutter speed ring seemed very difficult to grip as it was partially covered by the front part of the lens.
Then when I went to slide out the lens hood I noticed the whole front lens group slides out kind of like a collapsible lens.
If anyone has this lens and can look I am talking about the ring with the blue line around it; if I pull on this the whole front of the lens slides out; I am not talking about the hood as this slides out separately.

This seems rather odd to me as even though the front elements don't move the middle ones closest to the shutter do move.
I am not sure if it is even supposed to do this and wonder if someone has been tinkering with the lens before I purchased it.

Any advice is appreciated.