USCamera Service Tips - Vivitar MC 28 2.8 removal and clean the very hard to turn Aperture ring
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Helios 44-2 fungus cleaning tutorial
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Repairing oily, stuck aperture on Vivitar 28mm F2 MC lens (aperture disassembly).
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stickyfoam 20220412
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Pentax smc Pentax-M 50mm f1.7【分解清掃】
12:27
Vivitar 70-210mm f/3.5 : Dust Cleaning and Haze removal
15:02
Never Use WD-40 To Service Cameras (Explained + Tips)
21:08
The WORST Lens I Ever Bought? Vivitar 28mm f2 Review.
24:08