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Sbm Filters


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#1 scooterbutt

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Posted 09 December 2005 - 03:44 PM

what kind of filter do you need to use for the filter slot on a bolex sbm?
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#2 Nick Mulder

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Posted 11 December 2005 - 02:26 AM

I'm assuming you mean what is the filter made of as opposed to which filter eg, ND, color correction etc... I have an RX4 with the same slot -

Please anyone correct me if I am wrong here but they are made for thin gel type filters like those used in lighting - I personally wouldnt use it due to the lack of optical quality of this sort of filter, but they could come in handy with wider lenses that you didn't want vignetting issues ...

Is there a higher optical spec thin filter range offered for these in-camera behind the lens filter slots ? (coated glass, consistent etc...)

> ?
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#3 Sam Wells

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Posted 11 December 2005 - 12:23 PM

You use the Kodak Wratten gelatin filters

B&H Photo is the place to buy.

The optical quality is quite good. But they don't stay flat in humid conditions.

Ideally your lenses should be collimated / rear focus set with the thickness of the gel filter allowed for. The recomendation is to use a clear filter when you don't want "filtration" i.e 85, ND, etc.

I've cheated and just used an empty one however.

You always want one of the fliter holders / clips in position as you'll fog the side of the film otherwise.

-Sam
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#4 Boris Belay

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Posted 14 December 2005 - 02:56 PM

One more little clarification : behind-the-lens filter holders are different on H16 Rex (0-5) turret cameras and H16 Rex Bayonet-mount cameras like yours (SB/SBM/EBM), and different yet on the EL series (and again of another type on the non-reflex models with the filter option). They all take the same gels, but the filter holders are not the same shape.
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