Closest filter to create ortho response with pan film.

[Mr Bill]

Cool. Thanks largely to Nodda Duma's suggestion (and the Baltar lenses transmitting down into the UV).

 

[Gerald C Koch]

Jarin, an interesting read, and great attention to detail, good luck. Always good to see real film in a film.

I have a question why would the suppression of UV make a difference, I thought modern stocks, and modern lens did not pass much UV light at all?

Modern films are designed to have reduced blue sensitivity to prevent blues from being too light. This is important with blue eyed subjects.

 

[John51]

Would a Technicolor camera loaded with only the blue and green film do the job? Or are they unobtainable now?

 

[Jarin Blaschke]

Modern films are designed to have reduced blue sensitivity to prevent blues from being too light. This is important with blue eyed subjects.

Actually if you look at the double x tech sheet, it looks like the lowest sensitivity is between blue and green, and highest between violet and blue. But double-x is an old film..

J

 

[Jarin Blaschke]

Would a Technicolor camera loaded with only the blue and green film do the job? Or are they unobtainable now?

When you found one, a 3-strip technicolor camera would not only have to be seriously refurbished back into shape, but would be prohibitively unwieldy for modern camera movement, probably three times as loud, no reflex viewing, no video tap, clunky focus pulling, an obsolete lens mount, image softening / light loss through additional prisms, and serious film speed loss through heavy filters. If I recall, they were working around ASA 3 Back in the day. No thanks.

J

 

[John51]

3 ASA. I didn't realise that they were so slow. That explains why so many Technicolor movies were shot in bright bright sunlight.

 

[nworth]

good suggestion but, the 'hard-chop' requirement of the OP may require a special filter.

Actually, some ortho films had a little bit of red in them, so an 80A (converts type B color to daylight) may be enough. If not, a CC50C in addition may work. Minus red filters are hard to come by, but they were sometimes used in scientific work. Some places still have a stock of 3 inch gelatin squares. Suggestion: try the easy stuff and see if it works.

 

[Jarin Blaschke]

Actually, some ortho films had a little bit of red in them, so an 80A (converts type B color to daylight) may be enough. If not, a CC50C in addition may work. Minus red filters are hard to come by, but they were sometimes used in scientific work. Some places still have a stock of 3 inch gelatin squares. Suggestion: try the easy stuff and see if it works.

I guess you didn't see the post above - we are having the perfect filter made. The 80A doesn't do much, and it eats more light - I tested it.

If you look at Ilford Ortho tech sheet, sensitivity is dead by 570 nm - nowhere near red, or even orange, for that matter.

J

 

[Jarin Blaschke]

The movie was made and is coming out soon:

https://www.bing.com/videos/search?...22457122FFEC81A73DFA22457122FFEC&&FORM=VRDGAR

 

[Patrick Robert James]

That is pretty impressive. Can't wait to see it.

 

[JensH]

Hi,

looks very good. I like this style.

Gratulations!

Jens

 

[Guillaume Zuili]

Terrific !

 

[RalphLambrecht]

I'd try using a blue filter like an 85B. I've not done that, but worth trying as an experiment on a test shot of still film?

I agree, a blue filter should work but a hard chop is unlikeloy to occur;filtersalways have some transmittance to all wavelengths.

 

[Rafael Ramos]

great! saw the trailer and eager to see the movie

 

[awty]

Extraordinary, look forwards to the full length movie.....always wanted to be a light house keeper, that or a whaler, not much call for either these days.

 

[removed account4]

absolutely fantastic !

 

[Doremus Scudder]

The trailer looks great. I'll be sure and see the film when it hits theaters.

Jared,
What filter (and characteristics) did you finally end up with for the look? Just curious,

Doremus

 

[Jarin Blaschke]

The trailer looks great. I'll be sure and see the film when it hits theaters.

Jared,
What filter (and characteristics) did you finally end up with for the look? Just curious,

Doremus

Thanks guys. The film comes out Friday, and expands to more theaters on the 25th.

Eventually, Schneider optics made a filter to my specifications! 4x5" and 6x6" sizes for our camera's matte boxes. It passes light at >95% from UV up until 570nm, then suddenly hard cuts down to nothing. I got a true Ortho look and it cost me only a stop of light (actually 5/6ths stop).

Jarin

 

[Nodda Duma]

*That* movie! I have seen previews and was thinking about seeing it. I hadn’t caught up in this thread until today. What a pleasant surprise that it turns out to be the topic of this thread. Definitely watching it now.

Awesome!

 

[GLS]

Cool thread. I've been very intrigued by that film since seeing the trailer. You also were the DP on The VVitch? That was a really beautifully shot film. Kudos!

 

[RalphLambrecht]

I am not attempting a tint at all - the final film will be shades of true gray. I'm merely looking for orthochromatic response onto panchromatic film. Initially, I thought that strongly gelled lighting would be the way to go about it, but ultimately, I figured that a bright set and camera filtration is probably less distracting to the actors than a deeply cyan set. Additionally, there are many day exterior scenes where I would need the filter.

Does anyone have a spectral sensitivity chart for CC50? Or a blue 47 for comparison? I wouldn't be opposed to a "blue-sensitive" look with the 47 either - it's just that that filter eats too much light to be practical. Ideally it's 2 stops or less, while working as effectively as possible.


J

these charts are in the Kodak filter guide.

 

[alanrockwood]

Here's an image that shows some typical response curves for panchromatic, orthochromatic, and blues sensitive films. I got it from a kodak document titled BASIC SENSITOMETRY AND CHARACTERISTICS OF FILM. I found it at the following website.

https://www.kodak.com/uploadedfiles...etters_filmEss_06_Characteristics_of_Film.pdf

Of course, links come and go, so I am posting the actual figure here.

It looks like a filter with a cutoff somewhere in the range of 610 nm would be a good bet.

 

[alanrockwood]

Edmund Optics sells some cutoff filters. For example, they make a short-pass filter with a cutoff of 625 nm. They come in three different diameters. They are very expensive, and you would have to figure out how to mount them into a threaded filter mount. They also make filters with 600nm and 650nm cutoffs. Here's a link to the page.

https://www.edmundoptics.com/f/high-performance-od-4-shortpass-filters/13534/

Here's a figure showing typical transmission curves for a few of their filters.

As you can see, performance is extremely good.

 

[Jarin Blaschke]

Here is the filter they made for us. Luckily, double-X is dead before 700nm.

Jarin

 

[cramej]

I saw this today - quite an interesting film! The dialogue was not my favorite, but the cinematography, lighting and sound were excellent. I think my absolute favorite scenes were the ocean waves crashing at night. How did you get those shots? I almost felt like I needed to take a hot shower after I left the theater!