Sigma DP1M & Ricoh 0.75 GW3 = 21mm equivalent focal length

Discussion in 'Sigma' started by retow, Mar 9, 2014.

  1. retow

    retow All-Pro

    Jul 24, 2010
    DP 1 Merrill with a 21mm equivalent lens.
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  2. carrrlangas

    carrrlangas New Member

    Apr 21, 2014
    Awesome! So, the GW3 just has a 49mm thread? Do you see much degradation in corners? and does AF works allright?
  3. retow

    retow All-Pro

    Jul 24, 2010
    The nice thing is that the GW3 screws directly onto to the Sigma lens, i.e. no adapter is needed, which keeps the camera reasonably compact and balanced.
    I don`t notice any difference in AF with the GW3 mounted and corner performance is fine for my needs. Although I did not do any "tripod with newspaper on the wall tests":wink:. The GW3 wide angle works equally well on the DP2M. The attached shot gives some idea about edge and corner performance with the DP2M.
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  4. That is pretty cool! They are about £150 on ebay which is pretty good. Deff future purchase i think. :)
  5. rybolt

    rybolt Itinerant picture taker

    Mar 24, 2014
    Yellow Springs, Ohio USA
    Paul Rybolt
    Do you need to have the GH3 adapter to use it on the DP camera?
    Thanks for any info.
  6. retow

    retow All-Pro

    Jul 24, 2010
    There is no adapter needed for the DP1M and DP2M.
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