vskw82 0 Posted December 28, 2005 hello, i am a newbie in security system. i facing one problem is which type of lens should i use to view 400 meters front. Any solution of this? Share this post Link to post Share on other sites
VST_Man 1 Posted December 28, 2005 not enough info.....need distance from and if you want to view that entire 400? There are many lense calculators out there..........do a web search or a search on the forum. 400 is a lot to view if........maybe your asking to view an object (person) at 400? Share this post Link to post Share on other sites
