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Lens Troubleshooting

Question: I have a lens that is “speckled”, what can cause this and what can I do?

Possible Causes: Lens was removed from the annealing stages and cooled under running water while too hot. If a lens is cooled under running water while hot, it may have a “speckled” appearance caused by localized differences in the rates of cooling of the lens surface. These speckles can be numerous, irregularly shaped.

Solution: The lenses should be air cooled for several minutes before running water over them. If you have a “speckled” lens, returning it to the annealing oven for 5 to 10 minutes will usually eliminate the issue