The ND filters are probably there to vary the output when you are
using the flash manually. The colours are useful for changing the
background colour of a shot. If you use complementary filters on
flash and lens (say, blue on the flash, yellow on the lens) you can
give yourself a blue background and normal colour foreground. Cokin
pushed this idea years ago in their early catalogues and made filters
to help you do this. Clearly, you would need exactly complementary
colours to avoid a colour cast on your subject.
Alternatively, some people want coloured lighting on their subject ...
At 14:03 -0600 23/10/02, Daniel J. Mitchell wrote:
Just picked up the zoom adapter and wide angle/ND/coloured filter sets from
a local used camera bits shop -- the zoom adapter, I can see the point of,
no problems there.
The wide-angle adapter, again, makes sense. The coloured filters, I'm not
sure when I'd ever want to use them, but heck, they were there and I didn't
think I'd ever see them again, so what the heck.
What are the neutral density filters for, though? Presumably it only makes
sense to use these in fully manual mode, because otherwise either the flash
(or TTL control) will try and compensate by firing the flash for longer, or
by keeping the shutter open longer -- so are they just if you want to barely
... not one shred of evidence supports the proposition that life is serious ...
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