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  1. #1
    what can i do with a 4+ close up filter?
    pscl227's Avatar
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    what can i do with a 4+ close up filter?
    well i picked up a 4+ close up filter from jessops today in the bargin bing for 5, but i am not exactly sure what it is used for or how to make best use of it? any suggestions?

  2. #2
    bfx
    Guest
    Do you mean a 4X teleconverter instead of 4X filter?

    If it's a teleconverter that mounts between the body and lens then it will effectively increase a lens's focal length by a factor of 4 - i.e. a 50 mm lens will give the same field of view as a standard 200 mm lens.

    But the TANSTAAFL rule applies. The effective f-stop is also quadrupled and, unless perfectly made, the point of focus may not be exactly at the film plane/CCD plane resulting in some blurring of images.

    If it's an add on that mounts to the front of the lens then it wiil give a 4X macro effect with possible fisheye effects. Generally the same tradeoffs as above exist particularly in regards to blurring if the add-ons focal point doesn't line up with original lens's.

    The only other 4X I can think of is a star filter that will create four 'star rays' from bright sources in the photo. Sometimes they're called 4X, 6x etc to denote the number of star rays produced.

    bfx

  3. #3
    what can i do with a 4+ close up filter?
    pscl227's Avatar
    Member Since
    Jan 20, 2005
    Location
    Liverpool
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    Mac Mini @ 1.5Ghz, 1GB ram, 12.1" ibook 1.33Ghz 1GB ram
    its just a filter that slaps on the end of the lens....

  4. #4
    bfx
    Guest
    With that description your best bet is to take some pics and look at the results.

    bfx

  5. #5
    what can i do with a 4+ close up filter?
    pscl227's Avatar
    Member Since
    Jan 20, 2005
    Location
    Liverpool
    Posts
    105
    Specs:
    Mac Mini @ 1.5Ghz, 1GB ram, 12.1" ibook 1.33Ghz 1GB ram
    well here is the first pic i took with it, nothin impressive, but you get the idea....


  6. #6
    what can i do with a 4+ close up filter?
    Odin_aa's Avatar
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    Jul 07, 2005
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    North Boston, NY
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    That allows you to focus on objects closer than you normally would be able to focus with the same lens. Try to focus on an object without it, see how close you can get and take a shot. Then put on the close up filter and you should see that you are able to get much closer and still focus on the object.

  7. #7
    what can i do with a 4+ close up filter?
    viridian's Avatar
    Member Since
    Feb 28, 2007
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    The only downfall of a closeup filter is that you may get a slightly softer image than using without it. The more glass that you have infront of your lens the softer the image. As if you are a hard focus person use less filters.

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