The CZJ 35/2.4 Flektogon is quite the easy lens to disassemble. At least to the part where you have the aperture assembly removed. For instructions on how to clean the aperture blades, please refer to Andy Brown's guide to disassembling the 135/3.5 Sonnar
. The 135/3.5 Sonnar shares alot with the 35/2.4 Flektogon build-wise. The main difference would be that you have to remove the focusing grip to really get to the aperture assembly. .
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