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Two more EPROMS: a 1981 Fujitsu 8532 (4k) and a 1992 ST Microelectronics M752 (512k). The increase in transistor density has reached the point where we now add additional magnification by using the 16mm Luminar in two complimentary views: one oblique reflected illumination and the other epi-illumination.

First, the 8532:
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The difference in appearance between oblique and epi-reflection is striking.

Next, the M752:
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Sharp-eyed viewers will notice the visible distortion caused by the curved surface of the glass/quartz window. In addition, the optical performance of the Luminars, especially the 40mm and 16mm, is really impressive, especially when considering the images here are only the central 10% of the full image circle. These lenses represent a pinnacle in optical design, and even though they are over 50 years old, still outperform many lenses currently available on the market.

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