because the optical design of the lens requires and takes into account the fact that a filter is there. filters in front of a lens alter the optical properties of the system too. it's just that it should be too small to notice. in the middle, it's a different story.
Herb... ----- Original Message ----- From: "Kenneth Waller" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, December 06, 2004 6:07 PM Subject: Re: another filter question: FA* 300mm F2.8 > > "Both lenses shoot neutral color without a filter installed" > > Ok, I'll bite - > why do they come with a filter installed then?
