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class="style8" Anamorphic Lenses On HD
>Published : 7th March 2005
>Been asked to shoot a feature on HiDef and the director has suggested using anamorphic lenses.
>Anybody been down this road or do I get to be the guinea pig?
>There will be issues of either remounting the lenses or using an adaptor and then installing a board in the camera to compensate for the flipped image...but in principle it should work right, or have I forgotten some fundamental issue.
>Anybody any experience on this or ideas?
class="style9">>Been asked to shoot a feature on HiDef and the director has >suggested using anamorphic lenses.
>Do you mean actual 35mm anamorphic lenses? If so your widest lens would be what??? 20something mm. Not very wide on a 2/3" chip.
>In the July issue of AC there is a snippet (p.93) about Canon coming out with an anamorphic adapter/converter for use with HD primes lenses. It's called the ACV-235.
>Check out www.canonbroadcast.com
>Seems like a good idea worth investigating further for your project.
>Daniel Villeneuve, c.s.c.
Directeur-Photo/Director of Photography
demo à / at : http://dvdp.ca
>One problem with using standard 35mm camera anamorphic lenses is that they have a 2X squeeze, so on a 16:9 HD camcorder, you will create a 3.56 : 1aspect ratio once unsqueezed (1.78 x 2). You'll be wasting a lot of pixels cropping this horizontally to 2.39 : 1.
>Canon has a 1.33X anamorphic rear adaptor tube for pro video cameras, but it will be a few months before it's available. 1.33X will squeeze a 2.37 : 1 image onto a 1.78 : 1 CCD area. Apparently it requires that you flip the image in the camera's menu. It's rather long, making the camera a little awkward, but you'd have similar issues if you used the P&S Technik Pro-35 adaptor (although it's not as long.) And with the Pro-35 plus standard anamorphic lenses, you'd still have the aspect ratio problem to deal with.
>Unless you want the optical distortions of anamorphic photography, you're better off using good HD lenses and cropping to achieve 2.39 : 1.
>David Mullen, ASC
class="style9">>Canon has a 1.33X anamorphic rear adaptor tube for pro video >cameras, but it will be a few months before it's available.
>I saw this at NAB, if we're thinking of the same item... My memory is that one was custom-made for a Japanese cinematographer for a project that's already been shot - that's the one that was at the booth, as there was only one made up to that point.
>Maybe they'd rent it?
class="style9">> My memory is that one was custom-made
>I've seen articles, don't ask me to remember where, that have said it's going into manufacture and will be available RSN.
>Geoff Boyle FBKS
Director of Photography