Nikon Ophthalmic lenses
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Nikon Ophthalmic lenses
I've had an active search going for nearly a decade for the Nikon 5x and 10x Ophthalmic lenses. I just did a "sold" items search on eBay and found that a mint condition set of these was sold back in mid-June. Here is the link to the closed auction:
https://www.ebay.com/itm/Rare-1980-039- ... 7675.l2557
This auction listing represents the most information I've ever found on these lenses, with excellent pictures.
If my calcs are correct, the 5x lens has NA=0.16, and 10x has NA=0.32, fairly respectable wide open.
Did any forum member win these lenses? If so, please give us your impressions. They sold for quite a respectable price, so I don't feel terrible about missing them, but I would certainly have purchased them if I had been fast enough...
https://www.ebay.com/itm/Rare-1980-039- ... 7675.l2557
This auction listing represents the most information I've ever found on these lenses, with excellent pictures.
If my calcs are correct, the 5x lens has NA=0.16, and 10x has NA=0.32, fairly respectable wide open.
Did any forum member win these lenses? If so, please give us your impressions. They sold for quite a respectable price, so I don't feel terrible about missing them, but I would certainly have purchased them if I had been fast enough...
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I had never heard of those lenses either.
I am puzzled by the "5X" and "10X" notation, because the field size shown in one picture would be more like 1X on the full-frame camera that the text says it was shot with.
I'm wondering if the lenses were designed for use with some eyepiece or other adapter that would provide the final boost.
Ray, do you know what these things actually are, or at least what the "5x" and "10X" mean?
--Rik
I am puzzled by the "5X" and "10X" notation, because the field size shown in one picture would be more like 1X on the full-frame camera that the text says it was shot with.
I'm wondering if the lenses were designed for use with some eyepiece or other adapter that would provide the final boost.
Ray, do you know what these things actually are, or at least what the "5x" and "10X" mean?
--Rik
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Rik...no, I don't know the way they were supposed to be used, or if additional optics were required to get to the full magnification. I agree that the images provided show relatively low mag, something like 1x and 2x respectively for the 2 images. Both images show poor coverage as well. It would be interesting if the lenses came with documentation, but none was mentioned in the auction listing. Still a big mystery...Rayrjlittlefield wrote:I had never heard of those lenses either.
I am puzzled by the "5X" and "10X" notation, because the field size shown in one picture would be more like 1X on the full-frame camera that the text says it was shot with.
I'm wondering if the lenses were designed for use with some eyepiece or other adapter that would provide the final boost.
Ray, do you know what these things actually are, or at least what the "5x" and "10X" mean?
--Rik
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Those lenses are from the AS-1(1979) and AS-2(1985) Ophthalmic cameras for non-contact specular photography of corneal cells. The name is a "camera" but the instrument setup is more like a slit-lamp we see at the ophthalmologist.
The 5x is f=50.7mm, NA0.16, the 10x is f=28.4mm, NA0.32. Both indicated mags are achieved with +20cm extension on a normal F-mount provided with a porro-mirror box on the instrument.
John
The 5x is f=50.7mm, NA0.16, the 10x is f=28.4mm, NA0.32. Both indicated mags are achieved with +20cm extension on a normal F-mount provided with a porro-mirror box on the instrument.
John
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It also has its own film camera:
http://redbook-jp.com/redbook-e/fan12/b03.html
These appear to be medical lenses. Myutron makes similar looking ones for the industrial F-mount.
Myutron LS07F by Macro Cosmos (DH), on Flickr
http://redbook-jp.com/redbook-e/fan12/b03.html
These appear to be medical lenses. Myutron makes similar looking ones for the industrial F-mount.
Myutron LS07F by Macro Cosmos (DH), on Flickr
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Thanks guys, great additional info.
Looks to be a relatively normal camera, without extra extension.
What performance do you get from that Myutron lens? Does it have a model number?
You say "indicated images are achieved", were you the seller of the auction lenses? If the intent was to shoot with lens mounted directly to the camera, then I wonder what "5x" and "10x" really mean? Was the "slit-lamp" type of camera large and with much longer extension?abednego1995 wrote:Those lenses are from the AS-1(1979) and AS-2(1985) Ophthalmic cameras for non-contact specular photography of corneal cells. The name is a "camera" but the instrument setup is more like a slit-lamp we see at the ophthalmologist.
The 5x is f=50.7mm, NA0.16, the 10x is f=28.4mm, NA0.32. Both indicated mags are achieved with +20cm extension on a normal F-mount provided with a porro-mirror box on the instrument.
John
Macro_Cosmos wrote:It also has its own film camera:
http://redbook-jp.com/redbook-e/fan12/b03.html
These appear to be medical lenses. Myutron makes similar looking ones for the industrial F-mount.
Looks to be a relatively normal camera, without extra extension.
What performance do you get from that Myutron lens? Does it have a model number?
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Nope, I'm not the seller. I just happen to have a few of them on hand.
Most people just chuck the instrument when they don't need it, just keeping what is removable.
Here's how the AS-1 and the objectives look when in their proper configuration as an instrument.
The box between has 4mirrors arranged in a double porro-prism fashion, giving 20cm extention mount-to-mount. The objectives then give 5x and 10x.
The camera itself is a normal F2 with a special magnifying viewfinder.
Those Myutron LS lenses are also pretty good!
Most people just chuck the instrument when they don't need it, just keeping what is removable.
Here's how the AS-1 and the objectives look when in their proper configuration as an instrument.
The box between has 4mirrors arranged in a double porro-prism fashion, giving 20cm extention mount-to-mount. The objectives then give 5x and 10x.
The camera itself is a normal F2 with a special magnifying viewfinder.
Those Myutron LS lenses are also pretty good!
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Not bad considering their age, but the Mitutoyo MPAs clearly outperform (if within APS-C).
The image circle is larger and both 5x,10x will fill around dia.100mm@nominal mag. (not saying that the periphery would be pretty)
The "Volks-target", with the AS-1 10x. Fast and dirty test (no diffusion.)
D810, FX, ISO100, dev. in AdobeRAW with no sharpening.
Fuzzy at F1.4 (Fe15.4, NA0.32), much better at F2 (Fe22,NA0.23), corners sharpen up at F2.8(Fe30.8,NA0.16), acceptable at F4 and the rest is mush.
(It's darn hard to align these wafers parallel to the image plane! Does everyone use a gonio-stage for this?)
John
The image circle is larger and both 5x,10x will fill around dia.100mm@nominal mag. (not saying that the periphery would be pretty)
The "Volks-target", with the AS-1 10x. Fast and dirty test (no diffusion.)
D810, FX, ISO100, dev. in AdobeRAW with no sharpening.
Fuzzy at F1.4 (Fe15.4, NA0.32), much better at F2 (Fe22,NA0.23), corners sharpen up at F2.8(Fe30.8,NA0.16), acceptable at F4 and the rest is mush.
(It's darn hard to align these wafers parallel to the image plane! Does everyone use a gonio-stage for this?)
John
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abednego1995 wrote:John,(It's darn hard to align these wafers parallel to the image plane! Does everyone use a gonio-stage for this?)
I know what you mean!!
I use this, works well with 5~6" wafers (haven't tried on larger wafers yet). Put double sided sticky tape on Rotary Platform to help hold the wafer in place. You can also put a small ball head on the Rotary Platform and end up with a very flexible subject positing setup.
Wemacro has these:
https://www.wemacro.com/?product=rotati ... men-holder
and these:
https://www.wemacro.com/?product=xyr-st ... men-holder
Hope this helps,
Best,
Research is like a treasure hunt, you don't know where to look or what you'll find!
~Mike
~Mike
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Another option is a tip-tilt stage. These are simpler than goniometers, and most useful for small shifts from flat. I use an Edmund tip-tilt for trimming and it works very well.abednego1995 wrote:Thanks, Mike! That'll probably do the work for the meantime....
I guess Wemacro has to get cheap alpha-beta stages in their inventory eventually! :-)
there is a 10x on ebay
https://www.ebay.com/itm/Nikon-F-Mount- ... rk:39:pf:0
https://www.ebay.com/itm/Nikon-F-Mount- ... rk:39:pf:0