I don't know if this was already posted but heres a link to a newly developed optical anti alias filter that is said to control one of the main problems of the canon dslrs.;

VAF-5D2 Optical Anti-Aliasing Filter (http://www.mosaicengineering.com/products/vaf-5d2.html)

I hadn't seen it before. I'd like to read a user review.

Early on with the 5DII I recall one user trying to set up a conventional anti-alias filter but I don't think he got too far. The Mosaic Engineering web site doesn't explain their technical approach, but the few images they show look promising. This is a major issue with the 5DII, and the filter could be very useful.

Hmm, promising. I'll be interested to see the uptake on this.

Philip Bloom blogs about in on his website and he was able to test a prototype and really liked it. I think that they run around $385 or so if I remember correctly. The only downside is that you need to remove it to shoot stills. It also messes up your backfocus and so your lens markings will be off.

Daniel Weber

According to the filter maker, you can still get infinity focus. So if we use follow focus or eyeball our focus on monitor or lcd in video then its still ok.
What the tests show is that focus wont hit the numbers and markers on the lens barrel. but we dont use that anyway in video.

Most of us on these forums bought the 5D for video anyway so, even if they disable photo function to get quality video from 5D this is still ok for a lot of us.

I wonder if it interferes with adapters for my Nikon lenses ??

Something to bear in mind, although many people will already own a 5D, is that buying this filter and a Z finder brings the 5D within approx $1,700 of a Sony FS100. That's still a big difference to some people, but it should be a consideration as you add more accessories to the 5D.

My thinking exactly Brian. I love my 5D MkII but at some point you have to do the math and decide what makes more sense. I'm on the fence about adding any more accessories since I use it for both video and photography. Relegating it to photography only and going in a different direction for video will probably make more sense at some point.

Do you have to remove it for stills if you use live view mode for stills?

The issue with stills is that it will significantly soften them down to where you will get a sharper photo with an iPhone.

Yeah, I tend to think this gizmo is just a wee bit too late to market. Between Sony - who's just having an amazing year - and the Mark III (if and when) - I think most pro/high end users of the Mark II will simply upgrade.

Whatever technical negatives there are - softening, lack of stills function, back focus thrown off, unknown effects - using this gizmo would void your warranty (and God help you if you somehow scratch the sensor). Personally, I don't like cramming anything into the middle of my expensive equipment.

Two years ago, this would have been killer. Now, I think it might has some market for all those used Mark IIs that are getting ready to hit the market - but not at $350. $99 sounds about right.

Not sure if this has been mentioned before (if so, let me know and I'll merge threads):

VAF-5D2 Optical Anti-Aliasing Filter (http://www.mosaicengineering.com/products/vaf-5d2.html)

-- Optically corrects most aliasing and moiré artifacts in 5D Mark II HD video.
-- No reduction of 5D Mark II 1080p video resolution for most lenses.
-- True optical correction before video image capture – no postproduction software filters or processing.
-- Easily installed or removed in less than 20 seconds.
-- 5Dmk2 H.264 codec compresses with better quality with the VAF-5D2, because false, high-frequency, aliased image components are eliminated before compression.

Posted here Chris:

http://www.dvinfo.net/forum/canon-eos-5d-mk-ii-hd/499812-new-5dmkii-anti-alias-optical-filter.html

D'oh! I didn't look down the index page far enough. Merged -- thanks,

The charts posted over at Philip blooms site on the tests he has done with a production version looks promising.

Surprisingly, the filter looks like its able to squueze a little more resolution due to its ability to minimize significantly aliasing and moire.

Click on the charts to get full res.

Moire and Aliasing no more?! A solution for the 5DmkII | Philip Bloom (http://philipbloom.net/2011/08/29/moire-2/)

This is a no-brainer for professional shooting on the 5D2.

Resolution is overrated. Just ask any makeup person or aging actress. But aliasing can make a good shot look bad. I'd gladly give up a bit of resolution to reduce aliasing.

This leaves rolling shutter as the one remaining artifact that one has to avoid in production. Of course, there's also the 8-bit limit, but that's to be expected at a fraction of the price of an Alexa or EPIC.

Anybody know when production units will be available?

Their site says there is a current 8 week delivery time due to high demand. Hope they can ramp it up fast enough.

I have the VAF-5D2 and it's amazing. Shot streets, buildings, moving cars, brick walls, clothing with fine patterns etc with very little aliasing and moire. Makes the shots totally usable. Without the filter those shots are impossible to do unless you do some serious post work. No apparent loss of sharpness whatsoever. I get soft corners on my 16-35 zoom from 16 to 20mm. I knew that, 24mm minimum is the recommended max for wide lenses. On a 5D 24mm is very wide so I have no issue there.

I recommend for serious shooters. For fruit bowls and backyards you don't really need it.

I recommend for serious shooters. For fruit bowls and backyards you don't really need it.

Funniest thing I have read in a long time!!

Philip Bloom's "real world, unscientific" test on the filter.

Mosaic Engineering 5DmkII anti moire/ aliasing filter test and review on Vimeo

This is the best 3rd party solution by far on the moire /aliasing issue on the 5D mk2.

Not perfect but much much better than the caprock filter.

See this test I did on the caprock;

Controlling moire on the 7D on Vimeo

Interesting about the 24mm zoom vs. prime. I would guess that the rear element of the zoom is larger and/or further away from the sensor, meaning that the light rays are straighter. Lenses with a smaller, closer rear element will have a larger angle of incidence at the corners.

Just saw this post from Chris Hurd. I was just about to order this filter,,, but...

http://www.dvinfo.net/forum/digital-video-industry-news/500720-something-new-canon-nov-3rd.html

Received my mosaic filter today. Will post my tests asap.

Started a new thread on the tests I made with anti alias filter;

http://www.dvinfo.net/forum/canon-eos-5d-mk-ii-hd/501078-testing-mosaic-anti-alias-filter-nikon-lenses-wide-zooms.html