Christmas Email Conundrum: How exactly do Spam Filters work? [more inside]
posted by crapples on Dec 6, 2008 - 9 answers

Is it possible to connect two external aquarium canister filters in the same closed loop? [more inside]
posted by BritishGas on Apr 30, 2008 - 2 answers

Relaying potentially 'subversive' information to a friend in China via email. How can I best go about it? Would IM be better? [more inside]
posted by dawson on Mar 18, 2008 - 12 answers

I am looking for an estimate of the overall size of the SLR lens market (U.S. or world) and/or market size for filters (polarizing etc)...my google-fu has failed me! [more inside]
posted by UMDirector on Feb 20, 2008 - 7 answers

Should I get an "Ionized Air Filter"? [more inside]
posted by Avenger on Oct 15, 2007 - 16 answers

Photography: How to make your own DIY Neutral Density filter? [more inside]
posted by sidereal on Sep 15, 2007 - 10 answers

What's up with that annoying fast-motion digital effect that's been popping up in movies the past few years? I think it's supposed to make things look scary, but it really has the effect of making everything look like a bad Benny Hill comedy. Is this something that directors do to their movies on purpose, or is it a byproduct of some sort of digital processing? [more inside]
posted by Afroblanco on Oct 13, 2006 - 38 answers

I shot a roll of print film (Kodak Gold 200) using the wrong filter (80a instead of polarizing). Can it be fixed in the developing — like when you push b/w film — or later, in the computer?
posted by LeLiLo on May 30, 2006 - 7 answers

My teenage son is way too involved with IM and a MUD, to the exclusion of his homework, and it's turning into a real problem. He needs the Internet for his homework, so we don't want to cut him off, just restrict some of the services he's over-using. But our DSL modem won't allow us to implement the restrictions we need. [more inside]
posted by lhauser on Apr 4, 2006 - 39 answers

Is it possible to bypass a packet filter in order to log onto AIM from my school's network? Filtering is combination URL filtering via Sonic Wall and packet filtering via Packet Hound. We have tried proxies but have been met with little success, we need a simple lightweight solution.
posted by SuperCoolZane on Jan 19, 2006 - 15 answers

Roll-up cigarettes: Do you use a filter? I'm just learning to add a filter to my roll-ups. It's a bit fiddly. And I'm wondering what your experiences with it are and whether it's worthwhile learning. I've been told that by adding a filter, the smoke will be less carcinogenic. To me, at least. Thanks for the input!
posted by timyang on Dec 1, 2004 - 12 answers

Is there a way of copying message filters for one Thunderbird mail account to another? I have a ton set up, and want to apply them to another account without having to do them all over again manually. I imagine there must be some config file that I can cut and paste to do this? [more inside]
posted by Big Fat Tycoon on Nov 25, 2004 - 4 answers

Which lens, filters, and accessories would you recommend for a Nikon D70 digital SLR camera? [more inside]
posted by cyniczny on Nov 24, 2004 - 17 answers

camera filter - i am looking for a cool little vintage or new standard (film) camera, an aluminum clad, small and nifty point and shoot... recommendations?
posted by specialk420 on Oct 15, 2004 - 15 answers

spamfilter - whats the latest hot ticket... i've tried cloudmark - and liked it.. what else do people recommend these days?
posted by specialk420 on Sep 9, 2004 - 9 answers

Spam-a-lot: Are there spam filters that can reject phony "Mail returned" virus e-mails by comparing the "failed" address to what you've actually sent? Such hoaxes are dominating my daily spam quotient, despite my use of spam-blocker Razor. But it seems like these would be easy enough for a program to detect.
posted by inksyndicate on Jul 28, 2004 - 3 answers

I have a Canon Powershot s50 digital camera which I dearly love. Is it possible to take infrared shots with it? I had a infrared filter for my old nikon fm slr, which, when used with infrared film, worked very well. I assume there must be some way to mount the same kind of filter on the digital camera, but will the sensor pick up the resultant filtered infrared image?
posted by luriete on Jun 28, 2004 - 5 answers

What's the deal with waterfilters? They're either sold like razors, with overpriced cartridges, (Pur) or offered through cheesy networks of multi-level-marketing that look like something from the Davinci Code.

After doing some googling I got interested in aquasana then discovered they were spamming usenet as recently as 1999. That sets my spider sense a-tingling.

I have yet to find an unsponsored site with reviews of filters, but Dr. Weil suggests a combination of charcoal and KDF for most filtering needs. Is there any reliable information out there, or do any of you have positive or negative experiences?

We're looking for something that will fit under our sink and make our highly mineralized well water taste good. Filtering out toxic crud is an added bonus. Thanks in advance!

addendum: This site (the NSF) has some good data, but no price-per-gallon.
posted by mecran01 on Mar 18, 2004 - 10 answers