Peter, Hello!
I have this model of the lens.
Lens got me a new one. Did not use them as the assembly factory blocked the focusing mechanism.
The lens cost me $ 31.00 including shipping
This was corrected by loosening one screw rubber ring.
Now answer the following questions:
1. Aperture on my lens looks similar. No influence on the shape of the hole has not bokeh.
2. I dissected and examined the lens mount aperture control mechanism.
My opinion is correct there does not need anything. A disassembled can lead to continuous adjustment to bring to its original state.
For a person not engaged in repair Rolleynars constantly it may take several days. That is the price adjustment outweigh the cost of the lens.
Set on Flicker



 
			 
			
			 Aperture on my lens looks similar.
 Aperture on my lens looks similar.
				 
					
					
					
						 Zitieren
  Zitieren 
 
				