What's the slowest ISO B&W negative perforated 16mm film that's readily available

[xkaes]

Seems like a simple question.

I can't find anything below 100 ISO?

 

[John Salim]

Seems like a simple question.

I can't find anything below 100 ISO?

Possibly something ( like a non-camera film ) such as Eastman EXR ( 2378 / 3378 ) Sound Recording Film ?
There's no ISO speed for these films, and they're orthochromatic, so experimentation would be in order !

link here ... https://www.kodak.com/content/produ...STMAN-EXR-2378-3378-technical-information.pdf

John S

 

[Kino]

Yes, 2378 is low speed but engineered to be extremely high contrast to obtain crisp track wave forms on optical tracks.

2234 is Panchro Dupe neg, 2366 is Inter positive (Ortho; can also be processed as negative) and 2302 Fine Grain Positive (Ortho; can also be processed as a negative), but the latest Kodak price list does NOT list them available with 16mm silt/perf specs!

All of the above have a equivalent ISO of somewhere between 6 and 12, as I seem to recall.

It should be a 5000 series if cut and perforated for 16mm; i.e., replace the first digit of the stock with a "5" = 5324, etc...

I would suggest you call a working motion picture lab, like Colorlab in Maryland and ask if you can buy a short end of one of the above stocks. Otherwise, minimum orders for non-listed Kodak stocks tend to start at 250K feet.

https://www.kodak.com/content/products-brochures/Film/Kodak-Motion-Picture-Products-Price-Catalog-US.pdf

 

[loccdor]

Products

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Some slower options there.

 

[xkaes]

FFP didn't have what I was looking for, but they did have some 16mm IR film -- ISO 200, double perf, negative -- so I got some of that instead!!!

 

[Europan]

Positive print stock is always a good entry for the experienced as well as the beginner. Labs have print film in stock. Non-sensitised but of fine graininess and not expensive, developed in three to four minutes, you can see what a lens is delivering, how accurately you focus, how lighting might be improved, whether the whole setup is worthwhile.

Print films are not made to a given exposure index, therefore batches vary in sensitivity. Generally they are around ISO 8 to 10.

I agree that slow stocks are missing. Manufacturers have let themselves carry away from the real/reel thing which is how 16-mm. cinematography had begun. FOMA BOHEMIA could make a Fomapan R 20. That would be most welcome.

 

[Harry Callahan]

A lot of people say that Fomapan 100 actually is a 50 ISO film, so this would get you under 100 ISO. If you then pull-process by one stop you should have 25 ISO.
What do you need a slow 16mm film for?

 

[Europan]

For filming in the snow, at the beach, everywhere where you have plenty of light, for a fine graininess, a smoother image, less depth of field at wider apertures, simply for a better quality than with high-speed stocks. I imagine slower films can be manufactured more cheaply because they take less ripening time.

 

[Harry Callahan]

I meant what the OP wants a slower film for - as he asked for a film below 100 ISO but then bought some IR film at 200 ISO.

 

[APL]

Fujifilm HR-21 microfilm iso 25 and they are still in production

 

[xkaes]

Microfilm is unperforated.

 

[APL]

缩微胶片未穿孔。

嗯，我知道的其他胶片只有 Fomapan Cine 100，这是感光度最低的 16mm 带孔黑白负片，以及 Fujifilm HR，这是我所知道的感光度最低的 16mm 缩微胶片。如果要装进需要打孔的机器，比如 Rollei 16，打孔确实很麻烦。不过，我在 FPP 上见过一些感光度低于 100 的黑白负片，但我没试过，比如 FPP Sonic25 BW Negative。