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11/17/2002 05:52:56 PM · #1 |
Does anyone know the difference between normal filters (UV, polariser etc.) and "digital" filters?
I was heading over to 7dayshop.com to get some for our shiny new Dimage7 and noticed that they sell both types. The only difference I can see is that ones with "digital" in the name are about three times the price!! Surely, a filter is a filter?
Mystified... |
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11/17/2002 06:19:17 PM · #2 |
Originally posted by ganders:
Does anyone know the difference between normal filters (UV, polariser etc.) and "digital" filters?
I was heading over to 7dayshop.com to get some for our shiny new Dimage7 and noticed that they sell both types. The only difference I can see is that ones with "digital" in the name are about three times the price!! Surely, a filter is a filter?
Mystified...
None of the filters i have bought are specified as 'digital' filters.. i didn't know there was a difference..
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11/17/2002 06:31:43 PM · #3 |
Originally posted by jmsetzler:
Originally posted by ganders:
[i]Does anyone know the difference between normal filters (UV, polariser etc.) and "digital" filters?
I was heading over to 7dayshop.com to get some for our shiny new Dimage7 and noticed that they sell both types. The only difference I can see is that ones with "digital" in the name are about three times the price!! Surely, a filter is a filter?
Mystified...
None of the filters i have bought are specified as 'digital' filters.. i didn't know there was a difference..
[/i]
There should be no difference. The filtering is taking place in front of the optics, and in front of a detector ( digital or film). Since in many cases the goal is to reproduce the output of film, you would like the filters to be the same. I would have guessed that the phrase "digital filter" would be software based. If there were a difference based on a detector response function, I would guess that Canon or Nikon would have made folks aware of it - and I don't believe they have.
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11/17/2002 07:03:34 PM · #4 |
the only thing that gets brought up is that many digital cameras
use a contrast based through the lens focusing system, which can
be disrupted by linear polarising filters.
So you might need a circlar polarising filter, depending on your camera. |
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11/18/2002 11:11:24 AM · #5 |
Thanks Gordon - I tend to go for circular polarisers for my SLR too, since I heard they are better for most AF lenses...
Sounds like a gimmick perhaps....
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11/24/2002 11:47:20 PM · #6 |
Yeah, it's just an advertising gimmick...Digital filters vs. Traditional Filters .... As someone already pointed out Linear Polarizers can mess with the camera's AF system but that's about it.
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