Canon 5d Mark ii (full frame sensor questions)

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MatthewMoon

Member
So, I've try researching before hand and haven't had much luck.. I have two questions:

1- Is the video quality better on the canon 5d mark ii then lets say t3i or the 7d, since it's a full frame sensor? (I know full frame sensor refers to photography, but I wasn't sure if it effect the video quality too.)

2- Also, can any fisheye lens work on the 5d mark ii since it's a full frame sensor? I am not sure if a fisheye lens would cause too much vignette or make it look funky on a full frame sensor camera.. ex: would a Vivitar 7mm f/3.5 work fine on the canon 5d mark ii?

Thanks

-Matthew
 
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full frame sensor means different aesthetic, and it also means better image quality in many respects (e.g. one stop higher useable ISO)
besides that, the 5D2 also has less aliasing/moire issues, better colors, etc, but the difference is relatively small (it's better in many respects, but only marginally better, IMHO)

it doesn't record 50p or 60p (the others have 720p60), and it doesn't have a swivel screen

additional comments and links here: http://www.similaar.com/foto/equipment/us_cam.html



edit: RE: fisheye:

it depends on the lens

the very cheap and very awesome samyang 8mm f/3.5 fisheye is designed for APS-C only, and it will show a hard vignette on full frame cameras such as the 5D2: http://www.kenrockwell.com/tech/images/8mm-f35/D3R_0794-1200.jpg (you can modify the lens to get rid of the built-in shade, and will then get a circular image: http://farm5.static.flickr.com/4054/4379243569_e972b78556_b.jpg)

most lenses designed for aps-c will work like that on full frame (actually, no matter if they are fisheye, wide angle, telephoto, anything: if the lens is not designed to cover the fullframe sensor, you usually get this kind of circle)

there are fisheye lenses designed for full frame, but they're usually a lot more expensive: http://www.amazon.com/gp/product/B0...=1789&creative=390957&creativeASIN=B0040X4OZU
check the samples here: http://photography-on-the.net/forum/showthread.php?t=948515 and here: http://www.canonrumors.com/forum/index.php?topic=1850.0

as you see, a very important part of the decision to move to fullframe is related to the cost of glass...
 
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Lenswise the difference is, the sensor on a Full Frame is roughly the same size as a frame of 35mm film. The result is the Field of View, Depth of Field, etc... mimics more closely how that lens would look on a 35mm film camera.
 
gonzo_entertainment said:
Lenswise the difference is, the sensor on a Full Frame is roughly the same size as a frame of 35mm film. The result is the Field of View, Depth of Field, etc... mimics more closely how that lens would look on a 35mm film camera.
Click to expand...

Most of the film cameras today uses Super 35mm film which is about the same size as 7D and other APS-C camera, full frame sensor size is close to Vistavision film. Rarely used today...
 
I think you're using "film" in two different senses: the 5D2 has a sensor that's as big as photographic film (36mm wide), APS-C cameras have a sensor that is slightly smaller than motion picture film (24mm wide)
(ok, it's the same 35mm film, but one moves sideways, the other top-to-bottom...)



edit:
more on sensor size, crop factor, equivalent focal lengths, field of view, depth of field, etc, here:
http://www.similaar.com/foto/tuten/100.html
http://www.similaar.com/foto/tuten/310.html
http://www.similaar.com/foto/doftest/doftest.html
 
marvinhello said:
Most of the film cameras today uses Super 35mm film which is about the same size as 7D and other APS-C camera, full frame sensor size is close to Vistavision film. Rarely used today...
Click to expand...

Still film, since virtually all of us are using Stills lenses. The frame size the lens was built for. Unless you are using "X" lenses which I am not.
 
Thanks everyone! Much appreciated..

Also I was wondering if the Vivitar 7mm f/3.5 fit on the 5d mark ii?

and

Why don't dslr film at 1080p 60?
 
I'm not 100% sure (the focus ring is different) but I think that vivitar is exactly the fisheye lens I was talking about (Samyang lenses are sold under many brands, including Rokinon, Bower, Vivitar, Falcon, etc; and in fisheyes there are different ways to measure focal length, and some brands decide to push their number harder than others); if that's correct, this is how it will look like if you put it on a full frame camera: http://www.kenrockwell.com/tech/images/8mm-f35/D3R_0794-1200.jpg and this is what you'll get if you shave the built-in shade (I think you can get this done professionally for $50 to $100): http://farm5.static.flickr.com/4054/4379243569_e972b78556_b.jpg
 
Thanks guys! You are really clearing things up for me!

One more question..

Will the vivitar fisheye give a vignette if you are recording on video mode on the 5d mark ii, since that I am not taking a picture..

Sorry if the question seem obvious but I just like to be sure..
 
this is not so on all cameras, but on all current canon DSLRs you use exactly the same area of the sensor when shooting video or stills
so it will look just like in those stills samples
 
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