Studio Fiber Converter compatible Sony CA-905L

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Knut Bussian

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Studio Fiber Converter compatible Sony CA-905L

PostWed Jun 12, 2019 10:40 am

Hi,

we are thinking of buying a box lense for use with an Ursa Broadcast. Does anybody have experience with the Sony sled (large lense adaptor) CA-905L and can the BMD Studio Fiber Converter be used with a with the CA-905L?

The Sony adaptor has got hybrid fiber Lemo connectors and powers the lense from hybrid fiber. But is the voltage / power sufficient / the right one?

Thanks,

Knut
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Xtreemtec

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Re: Studio Fiber Converter compatible Sony CA-905L

PostTue Jun 18, 2019 9:14 pm

Hi Knut,

I am not exactly sure if BMD did follow the same specs as Sony on this SMPTE powered system.
Might be a few issues i see:

Voltage difference
Total power possible
Communication difference (Especially because there is a low voltage power send trough the SMPTE that powers a micro controller and measurement electronics to measure the SMPTE cable before going into high voltage mode.
This could be completely different from the Sony check. might even damage components because BMD does not say it is compatible with other brand SMPTE units...

Also the Sony Sleds have electronics build in that do a lot of control functions for the camera.. This is also not compatible..
Image

The best way and how we did it is to buy an old sled. And power it from a D-tap / 4pin xlr. You only need +12V to power the lens. ;)

We used Phillips/BTS/GrassValley sleds They are cheap to find. Old Triax ones.. Gutted the inside..

LDK4482 Sled
Image

And if you want to travel lightweight check out the Canon SUP-NP2S Can be powered direct from the 4pin xlr. And you have an adjustment for underneath the Ursa. Because for that Sony and GV Sled you need to build a special riser to add between the camera and the sled. ;)

Image
Daniel Wittenaar .:: Xtreemtec Media Productions ::. -= www.xtreemtec.nl =-
4K OBV Trailer, ATEM TVS HD, 1M/E 4K, 4M/E Broadcast Studio 4K, Hyperdeck Studio Mini, Ursa Broadcast 4K, 4K fiber converters with Sony Control
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Knut Bussian

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Re: Studio Fiber Converter compatible Sony CA-905L

PostWed Jun 19, 2019 6:45 am

Daniel,

so the 12V supplied via the Hirose output from the Ursa is not sufficient? I thought, that the universal lens supporters power the lens only via Centronics / Hirose as I cannot see a separate power supply?

Knut
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Xtreemtec

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Re: Studio Fiber Converter compatible Sony CA-905L

PostThu Jun 20, 2019 3:03 pm

As far as i know the boxlens always gets a separate power supply and not from the lens connector.

And looking into our 66x lens i understand that. There are Tally Lamps (no led's but bulbs) Heavy motors. So this is not really recommended to power from the hirose.

Our cradles / Sleds we power them externally by 4pin XLR. (Which can be powered from the Dtap on the Fiber converter) ;)
Daniel Wittenaar .:: Xtreemtec Media Productions ::. -= www.xtreemtec.nl =-
4K OBV Trailer, ATEM TVS HD, 1M/E 4K, 4M/E Broadcast Studio 4K, Hyperdeck Studio Mini, Ursa Broadcast 4K, 4K fiber converters with Sony Control
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Denny Smith

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Re: Studio Fiber Converter compatible Sony CA-905L

PostFri Jun 21, 2019 2:36 am

According to Tim at BMD, thr box lenses need an external power connection as the camera power output via the Hirose is not sufficient.
Cheers
Denny Smith
SHA Productions

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