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| Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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3rd Sep 2017, 11:22 am
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Retired Dormant Member
Join Date: Aug 2017
Location: Essex, UK.
Posts: 1
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TV camera zoom lens. Auto-iris circuit.
Having spent some hours tearing down this old TV/CCTV zoom lens, I thought the video auto-iris circuit might be useful for reference. The lens, 8-80 mm at F1.12, is generic but looks similar to more recent Pentax ones. Image quality is iffy by photo standards but good enough for a pre-1080p camera.
PCB is by Seiko and the semiconductor types are all now obsolete though there would be no difficulty in sourcing equivalents. |
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