Tuesday, April 09, 2002, 7:43:59 AM, Artur wrote: AL> As usually the PDML-ers provided the solution for my problem - THANKS:) AL> Of course I did the same thing you did:)) I removed the filter, thinking why the ^%$&^% it should be there:) After putting the filter back on the lens, everything works AL> fine, of course:) AL> BTW, so why the ... this filter is needed to focus on infinity? What's the idea? AL> Greetz AL> Artur
Well, it was calculated to be in the lens light path. The manufacturer wanted to provide possibility of using filters with a fisheye, and you just can't put them on the front :) So they computed the lens with the filters on back in mind. It's like some of the big telephotos with filter drawers, they are computed for filter in the drawer at all time, it's a part of the optical path. Without it, the lens will of course work but might not focus on inf, or be worse or whatever (some big lenses don't require it). If you have priced 112mm or 136mm front filters lately, you will understand why the put the drawer there ;-) Good light, Frantisek Vlcek - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
