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Bolex Rex 1


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#1 Dan Riordan

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Posted 04 September 2007 - 12:46 AM

Does anyone have an exposure table for the bolex rex 1? Not the first reflex, but the rex1. It has a 145 degree shutter. I can figure out the real exposure times but does anyone know the adapted shutter speeds, taking into consideration light loss from the reflex viewing?
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#2 Nick Mulder

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Posted 04 September 2007 - 12:53 AM

Assuming the prism on my RX4, SB and EL is the same as yours it will be taking ~%17 of the light away ... do some mafamatatics on your real exposure times and you'll be away laughing ;)

A way to test it for sure is to use a spot meter with some sort of linear output and do a measurement with prism and then one without of some surface ...
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#3 Robert Hughes

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Posted 05 September 2007 - 12:24 PM

I always used a 1/3 stop loss with my old Bolex reflex, seems about right.
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#4 Nick Mulder

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Posted 05 September 2007 - 05:37 PM

I always used a 1/3 stop loss with my old Bolex reflex, seems about right.

Close enough for rock and roll ;) and tending towards over which is better than under
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#5 Dan Riordan

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Posted 18 September 2007 - 11:41 AM

Thanks for the help guys, but does anyone have the adapted exposure table with the light loss acounted for in terms of shutter speed? I can't seem to find it for the rex1 although i have found it for other models.
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#6 Nick Mulder

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Posted 18 September 2007 - 01:36 PM

Why wont the chart for the 'other models' work for the RX1 ?

I pretty sure the prism is the same ... (and shutter angle)
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#7 Dan Riordan

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Posted 18 September 2007 - 02:31 PM

The rex1 has a 145 degree shutter. The rex 2-5 is a 133 degree shutter. (the very first rex, pre rex-1, is a 144)
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