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08-10-2021, 02:39 PM   #1
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How to remove 2nd elements from sigma apo 135-400mm

Hey all.

I have an old Sigma 135-400mm APO and I need to clean some fungus off the surface of the 3rd element group. Removing the first element group was easy, but anybody know how to remove the second elements so I can have access in cleaning the 3rd group?

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2nd elements, 3rd, apo, camera, element, elements, elements from sigma, pentax help, photography, removal, sigma, sigma apo, troubleshooting
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