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Thread: nex7 with 8mm fisheye

 

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    nex7 with 8mm fisheye

    Hi all,

    Was just curious if anyone had tried the 8mm fisheye for the nex in a dome underwater. I am debating getting the housing and I am attempting to pan out all the little details.

    Cheers,

    Dave

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    deco369's Avatar
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    Got the Samyang 8mm F2.8 a week back and just did a pool test. Focuses well when set to F8, focus 0.3m within the 4.33" dome for objects a metre or more away. Anything closer than 0.6m will become out of focus. Here's a pool shot.
    DSC02268.jpg

    ---------- Post Merged at 08:53 PM ---------- Previous Post was at 08:42 PM ----------

    I also tried the Sigma 19mm within the dome - it's very sharp for objects a metre away, and looks sharp at 0.6m too. Anything closer is out of focus.

    DSC02310.jpg

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    What brand is the 8mm Fisheye?

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    Last edited by deco369; September 10th, 2012 at 11:16 AM. Reason: Add more info

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    How does this compare with the Fish eye converter on the 16mm?

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    I don't have one to compare, but my impression is that the 16mm has quite a bit of chromatic and edge distortion on the nex7.

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    Quote Originally Posted by deco369 View Post
    I don't have one to compare, but my impression is that the 16mm has quite a bit of chromatic and edge distortion on the nex7.
    I've been using the kit 16 mm with both the fisheye and the wideangle adapters. Yes the is a lot of chromic distortion. I can repair a lot of it with Lightroom 4. However, overall image quality is disappointing. Getting much better color, contrast and sharpness with the Sigma 19mm.

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    Here are some shots unedited using the Samyang/Rokinon 8mm. Notice the anitiflare shroud is just visible esp on surface shots.

    DSC02347-001.jpgDSC02352-001.jpgDSC02362-001.jpg

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    scubadiver sparks's Avatar
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    Do you still have full controls of the lens in the housing? I only ask because there is an aperture control ring on the lens.

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    Nope, in a dome port, I just used min focus distance 0.3 and F8 in order to focus on the virtual image. F5.6 might work too, but I have just left it on F8. You can turn on focus peaking to have an idea of the focused areas.

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