Hello Csaba,
I am wondering why the RK man is not wearing the DK im Gold? Are you sure about the date being mid or early 1943? Could it have been taken at mid 1942?
Check this site with Recon RK-tragers. I tried to check the photos by clicking on the names. No one are 100% similar to the men on the photograph. The most similars were Hans Wolf, Reinecke, kroll, Felgenhauer and Kruger. Check it out yourself, ok?
http://www.luftwaffe39-45.historia.nom.br/ases/rk.htm
I still believe he is a fighter pilot, although the Oberleutnant seems to be wearing the Recon clasp and seems to be part of the crew!
Yours
Adriano