B-28 wide-angle converter with 17/1.8 for Milky Way?

Discussion in 'Astrophotography' started by barry13, Apr 24, 2016.

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  1. barry13

    barry13 Super Moderator; Photon Wrangler

    Mar 7, 2014
    Southern California
    Barry
    Hi,

    I found 3 Olympus lens converters at a swap meet yesterday for $20, including the B-20 wide-angle converter.

    I'm planning on going to Anza Borrego in about 2 weeks and am hoping to take some Milky Way shots (new moon).

    The only relevant lenses I have are the O 17mm f1.8 and the 12-40/2.8.
    I also have the ZD 7-14/4 and 8/3.5 FE; I'm assuming those would be rather slow.

    For the 17mm, I'd have to get a 46-55mm step-up ring for the 55mm threads on the B-28.

    Has anyone used the B-28 (or similar) with the O17/1.8 at night? How is it?
    Would it be better than the 12-40mm @12/2.8?


    Thanks!
    Barry
     
  2. wjiang

    wjiang Mu-43 Hall of Famer

    It might be worth a try, but I'd be weary of combinations that weren't designed for each other... I tried the Panasonic GWC1 converter on the PL15, the edge resolution and coma was pretty bad. I recommend you try it out closer to home first.
     
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  3. agnieszka

    agnieszka Mu-43 Regular

    71
    May 1, 2015
    Central Coast, NSW Australia
    Agnieszka
    Just took this tonight with my Oly17/1.8 + 0.48x generic converter off eBay (attached with a 46-58 stepup ring). Not cropped. Pretty happy myself.

    B4300080.
     
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  4. agnieszka

    agnieszka Mu-43 Regular

    71
    May 1, 2015
    Central Coast, NSW Australia
    Agnieszka
    in terms of WA converter, my 0.48x does not perform well at all on zoom lenses. the 17/1.8 is the only prime i have, but it seems to work ok. i have briefly tried it on my zooms and there's basically no point.
     
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