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Thread started 06 May 2009 (Wednesday) 21:03
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What would a 1mm f/1.2 lens look like?

 
SteveNC
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May 06, 2009 21:03 |  #1

What would a 1mm f/1.2 lens look like?

I'm talking physical dimensions. Just for fun. :)


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Jim ­ G
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May 06, 2009 21:09 |  #2

If you've seen some of the full-frame Nikon ~6mm fisheye lenses..... probably freakin' ginormous. :p


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nilsjnesse
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May 06, 2009 21:40 as a reply to  @ Jim G's post |  #3

1mm f/0.1 would be better.

Coastal Optics (external link) do custom lenses, you can fill out an inquiry form and see what they say...




  
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Jman13
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May 06, 2009 21:41 |  #4

Do you mean one for a full frame SLR? Because format size will have a HUGE impact on size. I wouldn't be surprised to find out that some camera phones are pretty close to 1mm lenses. At that size, the aperture only needs to be a little smaller than 1mm, so it could be very small for a tiny sensor.

For 35mm, though, it might not be physically possible to make. As mentioned, the Nikon 6mm fish is the widest lens ever made for full frame, and it's absolutely HUGE (several pounds and something like a 6 inch diameter front element). Well, the f/2.8 is...the f/5.6 version is much smaller, but requires mirror lockup to mount. It's got a 220 degree circular field of view.

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Vascilli
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May 06, 2009 22:31 |  #5

1mm, I think it would bulge out quite a bit.


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p32shooter
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May 07, 2009 16:41 |  #6

B.I.G. times GINORMOUS


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wimg
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May 07, 2009 16:50 |  #7

I don't think it would be possible, unless you put some intermediate system in between, fiber optics or so.

1 mm from a rectilinear POV is impossible, because of physical and mathematical constraints, for a fisheye I'd have to check the formula, but I don't think that'll work either, hence the fiber optics suggestion. In that case you could probably use it as a very fancy macro lens.

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rdenney
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May 07, 2009 17:33 |  #8

Take a glass bead, and cut it in half. But the image circle will only be 1mm or thereabouts.

Lenses that short are not that difficult. Lenses that short that provide coverage--that's another matter.

If it's a rectilinear lens to cover a larger format than a millimeter or two, the edges would have to be thickened up to magnify the images at the edges. It is entirely likely that the image plane would fall within the glass. Glass with sufficient refractive ability doesn't exist. Further, even if it did, it would only include an extra bit of scenery at the edges compared with existing hyperwide rectilinear lenses in the 10-12mm range (for full frame format). Rectilinear lenses actually must have effectively a longer focal length (and therefore more magnification) at the edges than at the center to maintain those straight lines.

If it's a fisheye, it will only make a 3mm circular image no matter what you do.

For a sensor that is 1x1.5mm, however, it would be the size of a tiny glass bead.

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gasrocks
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May 07, 2009 17:58 |  #9

Rick beat me to it - I was going to say a glass marble.


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What would a 1mm f/1.2 lens look like?
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