I dunno. I've never considered that depth of field might reach back to
one of the lens elements. Best test with a small piece of tape then.
Chuck Norcutt
Piers Hemy wrote:
> Might not the extreme depth of field on an 8mm lens make this
> less-than-ideal?
>
> I habve in mind an 18mm lens I once had, complete with a large chip on the
> front element. It was a problem on a sunny day, with multiple bright spots
> spoiling the image. I duly blacked out the chip - which immediately became
> visible even on a cloudy day as soon as the lens was stopped down beyond
> f/5.6!
>
> Granted, the effect on the rear element may be different...
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