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Thread: <Long Exposure & Landscape Techniques with Olympus> by WongLP, Sat 6th Dec

  1. #61
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    Default Re: <Long Exposure & Landscape Techniques with Olympus> by WongLP, Sat 6th Dec

    Forgot to ask Wong,

    How come no one mention anything about Variable ND2-400?

    Kind of poor to buy so many others, ESP Amos poison me with that 40-150mm.

    Now that 42.5 and 75mm slowly fading away already.

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    Default Re: <Long Exposure & Landscape Techniques with Olympus> by WongLP, Sat 6th Dec

    Thanks Jedifish, Justinjoyfish, nice meeting all, pleasure to be able to share and meet new friends

    For Variable ND, it's normally not advisable for stills as the useable range is about ND32-64 (5-6 stops) even though it states ND400 (9 stops). At the stronger intensities, there's cross banding, have seen on even most expensive brands. Being made of 2xCPLs, it would be expected to have more IQ drop than using a single fix stop ND. Can do a quick google to know about cross banding effect. I would think it's more useful for videos though. If there's any brands that you intend to get, it's best to check online reviews before investing in one.

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    Default Re: <Long Exposure & Landscape Techniques with Olympus> by WongLP, Sat 6th Dec

    Thanks for the event LP Wong

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    Thanks all for the great event!
    Olympus OM-D E-M5 | Flickr | 500px

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    Default Re: <Long Exposure & Landscape Techniques with Olympus> by WongLP, Sat 6th Dec

    Quote Originally Posted by wonglp View Post
    Thanks Jedifish, Justinjoyfish, nice meeting all, pleasure to be able to share and meet new friends

    For Variable ND, it's normally not advisable for stills as the useable range is about ND32-64 (5-6 stops) even though it states ND400 (9 stops). At the stronger intensities, there's cross banding, have seen on even most expensive brands. Being made of 2xCPLs, it would be expected to have more IQ drop than using a single fix stop ND. Can do a quick google to know about cross banding effect. I would think it's more useful for videos though. If there's any brands that you intend to get, it's best to check online reviews before investing in one.
    So it is best to get a 3 , 6 and a 9, (Total 3 filters) that covers a general usage range?

    Thank you
    Jedifish

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    Default Re: <Long Exposure & Landscape Techniques with Olympus> by WongLP, Sat 6th Dec

    Quote Originally Posted by JediFish View Post
    So it is best to get a 3 , 6 and a 9, (Total 3 filters) that covers a general usage range?

    Thank you
    Jedifish
    3,6,10 is the most common set of ND filters that covers you all times of the day. 10 being able to use for day time for about up to 60sec usually (but at F22 likely on a bright day). You can stack 3+10 to achieve sharper images rather than using at F22 to overcome diffraction. If you remember the picture of F8 vs F22 shown during the talk, there's a distinct details lose between the 2 images. So using an additional 3 stop ND filter and set aperture to F8, you achieve the speed of F22, and yet achieve sharper images at F8 with an ND filter.

    Stacking filters though with screw on even on slim versions will have vignetting if use wider than 28mm equivalent typically. Holder system type will be ok, but it's also costlier.

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    Default Re: <Long Exposure & Landscape Techniques with Olympus> by WongLP, Sat 6th Dec

    Quote Originally Posted by wonglp View Post
    3,6,10 is the most common set of ND filters that covers you all times of the day. 10 being able to use for day time for about up to 60sec usually (but at F22 likely on a bright day). You can stack 3+10 to achieve sharper images rather than using at F22 to overcome diffraction. If you remember the picture of F8 vs F22 shown during the talk, there's a distinct details lose between the 2 images. So using an additional 3 stop ND filter and set aperture to F8, you achieve the speed of F22, and yet achieve sharper images at F8 with an ND filter.

    Stacking filters though with screw on even on slim versions will have vignetting if use wider than 28mm equivalent typically. Holder system type will be ok, but it's also costlier.
    Thank you for the advice.
    Looking forward for the 7-14 coming out soon, at least invest a bit on the holder system and not DIY like the previous Panasonic one .

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