89B filter

Discussion in 'Exposure Discussion' started by Jeff Kubach, Oct 6, 2011.

  1. Jeff Kubach

    Jeff Kubach Member

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    A while back I bought 89B filter(77MM) for my RB67. It is so dark I can't hardly see through it. Is this considered normal? BTW the filter wasn't cheap.

    Jeff
     
  2. ntenny

    ntenny Member

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    Yes. Hold it to a bright light and you'll see some red, but for practical purposes the filter should be opaque. And no, they're not cheap.

    -NT
     
  3. Jeff Kubach

    Jeff Kubach Member

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    Thanks for the info!

    Jeff
     
  4. mhcfires

    mhcfires Subscriber

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    The filter is, for all practical purposes, opaque. they work best with a rangefinder camera. I feel that they are pretty much useless on an SLR camera, you just can't see what you are shooting.
     
  5. Jeff Kubach

    Jeff Kubach Member

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    I know what you mean, I usually take it off and focus and put it back on. Kind of pain in the neck, but I like it.

    Jeff
     
  6. Роберт

    Роберт Member

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    Yes, both 89B (695nm) or 88A (715nm) are "Black" IR filters. Best chance on a R.F. camera. I am using it (88A) on my C.V. Bessa III 667 R.F.
     
  7. ntenny

    ntenny Member

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    That's a funny way to spell "TLR". :smile:

    I've never shot IR with an SLR, but I know people who do, and the workflow seems like a sort of "LF-lite": tripod mount, compose and focus, put the filter on, and then shoot. I suppose one could do the hyperfocal thing as well, or even just scale-focus given a sufficiently wide lens for that to be reasonable.

    -NT