Came across a very interesting on Ebay a couple of weeks ago, but bad ad photos made it hard to see any details, so I sent a low offer, and the seller accepted!
This is what I received.
That is what I call an iris!
All I know so far is what is on box label. If anyone has any info on it, please let me know.
Optikos is a 35 year old optical metrology company in MA, USA with clients like Qioptiq, Lensrentals, etc. Teradyne is 30+ yr old company based in MA that supplies semiconductor inspection equipment with clients like Samsung, intel, etc. So I have to assume that this lens is for semiconductor inspection.
The good
With a nominal f/2 and optimization for 2.82x it has the potential to be a great lens. So far handholding the lens, with flash, it covers full frame and is very sharp with little CAs.
The bad
Both threads are non-standard. The big side is male 52 OD and 0.80. Standard M52 should be 51.5-51.6 and 0.75. The smaller end is 44.25mm OD. Looking at having adapters machined right now. I will update my site and this thread when I get the adapters installed.
Any questions, comments, or help would be appreciated.
I put up a quick basic info page on my site:
https://www.closeuphotography.com/optik ... m-f2-lens/
Robert
Optikos Teradyne 2.82X 106MM F/2 Inspection Lens
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After owning this lens for a couple of years I just realized that it actually does perform best at 2.8x, where it perfectly sharp at f/2.
I have updated the page on my site with some new image samples at 2.8x at f/2.
https://www.closeuphotography.com/optik ... mm-f2-lens
Previously I was using the lens from 2.5x to about 3x where I preferred f/2.8.
Now I know f/2 is best at the designed magnification. I should have just read the label on the box in the first place. Better late than never I guess
Best,
Robert
I have updated the page on my site with some new image samples at 2.8x at f/2.
https://www.closeuphotography.com/optik ... mm-f2-lens
Previously I was using the lens from 2.5x to about 3x where I preferred f/2.8.
Now I know f/2 is best at the designed magnification. I should have just read the label on the box in the first place. Better late than never I guess
Best,
Robert
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