will uwl04 on rx100 nauticam/recsea cause soft corner?

[PiggyRun]

Finally I made up my mind to get rx100+nauticam/recsea+ uwl 04, however my dealer mentioned that rx100+uwl04 will cause soft vorner, however I have read many forum saying rx100+uwl04 provide very sharp corner. So, what now, I m dilemma again. Need help urgently

---------- Post added August 6th, 2013 at 07:30 PM ----------

Thanks interceptor121 for sharing so much.

 

[Interceptor121]

The UWL 04 fits the RX100 well with the recsea housing
The RX100 has soft corners by itself until around f/5.6 but this is not a lens issue is the camera lens itself