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Thread: first shots wih new a900 and worst ca ever seen

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    Senior Member ryc's Avatar
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    first shots wih new a900 and worst ca ever seen

    Well,

    I need to figure this guy out. but here is a first shotwith new a900 and zeiss 85. This is the worst CA I have ever seen.




  2. #2
    Super Duper
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    Re: first shots wih new a900 and worst ca ever seen

    It's pretty overexposed, as well, that may have something to do with it? Is that a JPG or from RAW, if so which converter?

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    Re: first shots wih new a900 and worst ca ever seen

    DxO and C1 Pro have both done a superb job for me at automatically removing virtually all traces of CA in A900 files taken with a variety of lenses.

    Cheers,
    Ross

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    Senior Member Eoin's Avatar
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    Re: first shots wih new a900 and worst ca ever seen

    Jorge, give it time, 12 hours and an over exposed shot really don't do justice to your ability or the cameras capability.
    A7II, FE 35, 55 C/Y 18, 28, 85, 100, 28-85

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    Senior Member edwardkaraa's Avatar
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    Re: first shots wih new a900 and worst ca ever seen

    Quote Originally Posted by Eoin View Post
    Jorge, give it time, 12 hours and an over exposed shot really don't do justice to your ability or the cameras capability.
    +1

    At 25mp, any hint of CA as viewed at 100% will look much worse than say the same photo at 12-14mp.
    M262 ZM 25/2.8 35/1.4 50/2 85/2

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    Member picman's Avatar
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    Re: first shots wih new a900 and worst ca ever seen

    Moreover I fail to understand the importance that is put on this. Isn't the quality of a lens often a matter of trade-off, you gain something in one area at the expense of loosing something in another area? CA is easily and automatically correctable in PP. So I prefer to have some loss in that area if this means gains in another area such as for instance the speed of the lens. I do not know if this is a correct trade-off pair to consider maybe others can correct me here. I guess basically what I want to say is that to me this is not a problem with any of the lenses I have, all of which show some CA on occasion, simply because it is perfectly solvable.

    Cheers, Bob.

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    Administrator, Instructor Guy Mancuso's Avatar
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    Re: first shots wih new a900 and worst ca ever seen

    Reading it in PS your really blown out to start with. You don't get under 255 until your almost at the center of the bud. About a stop over
    Photography is all about experimentation and without it you will never learn art.

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  8. #8
    Shelby Lewis
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    Re: first shots wih new a900 and worst ca ever seen

    Yeah... I agree with what has already been posted... and this purple fringing is called birefringence, not really CA (in the traditional sense as we normally use it... ie lateral/longitudinal color shifts at the pixel level).

    This purple fringing almost always is MUCH worse on high contrast edges where one "edge" is blown badly. Fix the exposure (in camera) and this should basically disappear.

    When I was shooting canon, the 35/1.4 was the same way... incredible most the time, but if I shot it in a situation where there was heavy, blown back lighting... the birefringence was, let's just say, "Vivid".

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    Senior Member ryc's Avatar
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    Re: first shots wih new a900 and worst ca ever seen

    here is one a little better

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    Re: first shots wih new a900 and worst ca ever seen

    Quote Originally Posted by ryc View Post
    here is one a little better
    HI Jorge
    Looks okay to me (although, of course, I cannot peep the pixels).

    I'm with the others on the over-exposure. I do also think it's worth mentioning that the 85 f1.4, lovely though it obviously is, is known to be a little prone to fringing. Still, it should only really show in high contrast areas with some over-exposure.

    Just this guy you know

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    Senior Member ryc's Avatar
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    Re: first shots wih new a900 and worst ca ever seen

    I was shooting those roses wide open just running around the yard snapping away. I can see the exposure is way off.

    here is an indoor shot of nothing. But you know how it goes, first time with a new lens means first pictures are usually of anything.

  12. #12
    Super Duper
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    Re: first shots wih new a900 and worst ca ever seen

    It's not easy to shoot a white flower in bright daylight, very easy to blow the highlights.

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    Super Duper
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    Re: first shots wih new a900 and worst ca ever seen

    If that's the worst you've ever seen you should try the Canon 85mm 1.8 wide open...
    I am not a painter, nor an artist. Therefore I can see straight, and that may be my undoing. - Alfred Stieglitz

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