P3D Re: Importance of lens coatings

[Eric Goldstein <egoldste@xxxxxx>]

Dr. George A. Themelis wrote:

> I am surprised you removed any coating in the first place... I clean
> lenses all the time and never had a problem.  Are you sure you removed
> coating and not "blue dirt" or something?

It is relatively easy to abrade early lens coatings, either through use
of too strong a solvant, too abrasive a tissue or too much pressure
applied during cleaning. If this were not the case, so many classic
cameras would not suffer from so-called "cleaning marks" which are more
the norm than the exception. Look at your old cameras carefully and I
wouldn't be surprised if you don't see some coating wear.

But as I said, I too doubt that one cleaning removed all or even most of
the front surface coating...

> The lenshood will cut off stray light but how is the filter going to help?
> Does it help to put a coated filter over uncoated lenses?

Sorry to be unclear here. You're correct... a filter isn't going to
help, coated or otherwise. It is the excellent lens hoods which comes
with this set which will be of benefit in this regard...


Eric G.


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