Thread: Ursa 4k v1 pl - speedbooster project.

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  1. #21  
    I did not remove the turret because I had no need to get inside behind it. I did not want to introduce any faults.

    I expect the URSA main body under the turret will be the same. In the back of the turret there will be separate sockets or plugs which match sockets or plugs in the camera body, maybe Lemo type, like the SI2K which has a docking body for the camera module. On the PL turret, there is probably a blank hole or depression where the lens control plug/socket would be on the EF-Mount turret.

    I imagine that at some point BM may have thought of making the turret detachable to be used as a remote camera head on cables like the SI2K P+S recorder unit and the SI2K mini.
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  2. #22  
    For interest of anyone who would like to have a speedbooster in their URSA, I have obtained some numbers from a local machinist.

    Costs thus far :-

    For both the internal support for the speedbooster optical cell and Nikon F-Mount base only = AU$460-00, plus material.
    GST if in Australia = AU$46-00.
    Nikon F-Mount supplied separately by camera owner. = Cost unknown. Cost $AU Zero if the Speedbooster is Nikon Mount type.
    "Ultra" 0.71 Speedbooster optical cell supplied by camera owner. = AU$610-89.

    With used big URSA cams going inexpensively on eBay, a cost of about AU$1010-89, plus AU$102-00 GST probably represents over-capitalisation for the benefit of near-to full stills frame fields-of-view and being wedlocked to Nikon F-Mount lenses.

    I have not been able to obtain any information regarding permission related to fitments designed to match registered design and separate supply of the 0.71 "Ultra" optical cell from either Metabones or Caldwell. Each entity seems unwilling or incapable of replying to email queries.
    Last edited by Robert Hart; 08-15-2017 at 05:28 AM. Reason: errors
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