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Forum: Maintenance and Repair Articles
10-01-2012, 07:30 PM
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So... I was having trouble with my 200mm infinity focus and came across your article. Thank you!
But a strange thing happened. I made the adjustment, tested and reassembled the lens. The last stage was putting the hood on, which had my Vivitar polarizer mounted on. Looked through the lens - no abilty to focus at infinity!! Thinking I was careless with my reassembly, I disassembled again. Tested again. Reassembled again. Again, no infinity focus.
Finally it dawned on me. Something was wrong with that polarizer. When I tested, I did not have the polarizer on. When I finished the reassembly, I did have the polarizer on. Once I removed the polarizer, I had my infinity focus!
I then tried the polarizer on my M*300 lens, but because that lens can focus PAST infinity, the polarizer reduced the focus to infinity - not past infinity.
Needless to say, the polarizer is now relegated to my box of unused filters. Does anyone know why that polarizer was causing the reduced distance?
I use k1000 film cameras with these lens. The polarizer is a Vivitar circular - rather than linear. It's a newer polarizer as compared to my K 2.5/200mm old lens. Feedback welcome!
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