Nisen bokeh

This topic contains 4 replies, has 3 voices, and was last updated by  chupathingie 7 years, 6 months ago.

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  • #2677

    fluffybunny
    Participant

    I’m probably displaying my photographic ignorance here but I just figured out one of those mildly annoying technical issues we all live with in various forms.

    I have a Tokina 150-500mm f/5.6 AT-X (http://www.kenrockwell.com/tokina/150-500mm.htm – just for you Orionid) manual focus lens in Nikon mount with an adapter for my 7D. I’ve had it for a few years and some times I get “stringy” or “double line” bokeh from it. Annoying but it is a nice lens otherwise, I just lived with it.

    Turns out these descriptive terms led me to:
    http://bokehtests.com/Site/About_Bokeh.html

    Which explains the physics of it, and a short google later I found that it can be caused by UV filters. The universal protector has become a liability in this case, go figure. I took the filter off (all 95mm of it) and voila, problem solved.

    You can see the effect in my entry for “watercraft” titled “Get on. Ride hard.”

    It is still a MF lens and difficult to use for action (like that jet skier) but I have always liked it and it just got a little bit better.

    #46691

    chupathingie
    Participant

    Good find… a well-spent hour reading that (been a long day, I’m kinda slow)

    #46692

    orionid
    Participant

    o.O

    #46693

    fluffybunny
    Participant

    o.O

    I know how much you like Ken Rockwell.

    #46694

    chupathingie
    Participant

    o.O

    I know how much you like Ken Rockwell.

    😆

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