Hello, I have bought recently a new objective (Sifma 17-70) and now choose the protective filter for it. That you will advise to buy: Kenko 72mm PRO1-Digital Protector or Kenko 72mm L37 Super PRO MC UV HAZE or some other? I used UV the filter for 18-55 earlier but have not seen advantages UV filter. But it sometimes spoilt photos. Thanks.