Re: First real weekend shooting DS

[David Oswald]

Godfrey DiGiorgi wrote:
Is it purple fringing? If so it may be the ultraviolet light, can you
try with an UV filter?

http://dpfwiw.com/filters.htm#fringing


I'll try a UV filter.  And I hope it's that simple.
Since the M has a warmer cast to the coatings I would expect
a similar result.  But the A is again that cool purplish cast.
I'm going to borrow my son's and give it a whirl.


Frankly, I don't think that a UV filter is going to do much to help.  
I've experimented with UV and Skylight filters to see if they could  
correct "purple fringing" (more accurately, 'blooming') issues, and  
didn't find any particular benefit.

Digital sensors are not particularly sensitive to UV light; UV  filters 
can cause other problems.

Godfrey

Godfrey,

Ok, I'll bite.  What problems do UV filters cause (assuming a decent 
quality multicoated type)?  There's the obvious: An extra couple of 
glass surfaces which could themselves contribute to flare, but is there 
anything else?