Luminous Landscape Forum
Equipment & Techniques => Cameras, Lenses and Shooting gear => Topic started by: Brian Hirschfeld on December 13, 2011, 07:19:29 am
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Hi,
I was wondering is the size of the image circle for these lenses published anywhere? thank you
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Which lenses?
BR
Erik Kaffehr
Hi,
I was wondering is the size of the image circle for these lenses published anywhere? thank you
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Canon
8-15 f/4L
35mm 1.4L
50mm 1.2L
24mm 1.4L
300mm 4L
17mm tilt shift
24mm tilt shift
Zeiss
85mm 1.4
100mm f2
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One way to do it is to find a trashed Canon EF camera with an intact mount on it and mount that eseentially on a box with the right flange to sensor plane depth. For the back of the box use a either a groundglass ( congratulations you have essentially just built a simple view camera!) or a simple piece of translucent plastic or plexiglass. Make sure the lens is set to foucus at infinity.
If you are asking because you want to know if any of those lenses might work on a hypothetical medium format camera, the answer is no. Even if if the area of the projected image exceeds the diagonal of a 24x36mm rectangle it is highly that most of the ones on your list are optically corrected, at i or near infinity, for areas outside of that rectangle. There might be a couple of exceptions in your lit: the 300mm, the 8-15mm at any focal length that that fits the entire 24x36mm frame, and the 17 and 24mm TS-E lenses.
At very near focusing distances the image circle will likely be larger for all of the images.
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I'm going to be doing a review of the Hartblei camera and as they say, the Zeiss 100mm f/2 and 85mm 1.4 work as well as the 8-15mm, 17mm tilt, and 24mm tilt with their H1 camera, so, i was wondering what allows these lenses to do this versus other lenses....and I understand the image circle is the determining factor...thanks,
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I'm going to be doing a review of the Hartblei camera Which Hartblei camera?
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H-cam b1
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Way not just mount the lenses on the H-cam. You should be able to figure out the image circle at that point, at least if it is too small (and then you can measure the image circle ;) ). I am not sure how much stopping down a 35mm lens improves the image circle...
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Because I have to go get the lenses from my local camera store since I am a NIKON shooter ;)
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For the tilt shift lenses, the image circle size is discussed in most reviews. It is about 67mm for both lenses.
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Because I have to go get the lenses from my local camera store since I am a NIKON shooter ;)
odd that they don't make a Nikon mount version.
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Many years ago, I wanted to find the real image circle of various Hasselblad Zeiss CF lenses. I did it by fabricating a way to attach the lenses to a Tachihara 4X5 field camera. Then I loaded several 4X5 cuts of b&w paper to the film holders. Something peculiar I found out was that the image circle of these lenses didn't change much by stopping down like large format lenses did.
Eduardo
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Since image circle is a bit about how poor corner quality one can accept I guess there is not any precise definition. The normal lenses are designed for 44mm of course, the diagonal of the 36x24mm sensor, but some might produce acceptable quality a bit wider, don't know. Canon would not have any reason to specify though since they don't have any larger sensors or shift adapters. The new tilt-shift lenses have 67.2 mm image circle (the old had 58mm).
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I have the 14-24 nikon and I was going to rent those lenses, and Lensrentals has a canon-nikon adapter, so why not.