Rollei Ortho 25 is an orthochromatic black and white negative film optimized for technical, scientific, and half-tone work, as well as creative and pictorial applications. Characterized by extremely high sharpness and resolving power, this unique film also features an impressively fine grain structure and is also well-suited to reversal processing for black and white transparencies. Ortho 25 has a nominal sensitivity of ISO 25/15° and a high-sensitivity reserve of two stops for greater flexibility when shooting. Its spectral sensitivity ranges from 380-610nm and is suitable for photographing in either daylight or tungsten-lit conditions. The film's polyester base has been tested to an LE-500 (life expectancy 500 years) archival rating and also features anti-curling and anti-static coatings, and, since it is a clear base, it is particularly well-suited to scanning applications.

This item is one box of 25 sheets of 4 x 5" film.

Orthochromatic B&W Negative Film    ISO 25/15° in Standard Process    Very High Sharpness and Fine Grain    Two-Stop Exposure Reserve    Ideal for Tech. & Half-Tone Applications    Spectral Sensitivity: 380-610nm    Archival LE-500-Rated Polyester Base    Suitable for B&W Reversal Processing

Related Questions and Answers

Q: 1. What is the notch code for Rollei RPX 25 Black and White Negative Film 4x5 sheets?

A: The notch code for the Rollei RPX 25 Black and White Negative Film (4x5", 25 Sheets) is a V.

Q: 2. It loads the same as conventional 4x5 film, in the film holder?

A: Yes, it loads the same as conventional film.

Q: 3. Hi, does this film require any focus shift to account for IR instead of visible light?

A: IR film requires a focus adjustment - that is, after focusing using visible light, the focus ring is turned the distance between the white and red focus line/dot on the focus scale, because the focal point changes slightly in IR. That said, because the film is large format, it's a bit more difficult to gauge with bellows focusing.

Q: 4. Do yoh use a standard development process for this film?

A: Yes; to be exact, I use D-76.

Q: 5. Can this film safely go through airport x-ray machines?

A: Regarding whether the Film Photography Project Black and White Negative X-Ray Film (4 x 5", 25 Sheets) can go safely through airport X-ray machines, most film is safe under 400 ISO. However, I would still ask for a hand check.

Q: 6. Someone can informe me about the reciprocity of the Ilford Ortho Copy + 4x5? i want to use this film with a pinhole camera.

A: On page two of the following PDF, there is a graph that shows the amount of time you would need to add to various metered exposure times. http://bit.ly/1V4RhsS

Q: 7. Is this a continuous-tone film, or a "lith" type emulsion (very high contrast) for repro work?

A: The Ilford Ortho Plus Black and White Negative Film (12 x 20", 25 Sheets) is Orthochromatic B&W Negative Film. It is high contrast. Ideal for Tech. & Half-Tone Applications.

Q: 8. Are there known developing times for this film with PMK Pyro?

A: The developing time for Film Photography Project Black and White Negative X-Ray Film (4 x 5", 25 Sheets) in Photographers' Formulary PMK Pyro-Metol Kodalk Developer is around 3.5 minutes at 68F (20C). The film has a blue and green sensitivity. This enables the film to be processed by inspection under a red safe light.

Q: 9. Do this have a notch for identifing the emulsion side?

A: Rollei Infrared 400 Black and White Negative Film (4 x 5", 25 Sheets) does have a notch for identifying the emulsion side.

Q: 10. What's the difference between rpx25 and rollei pan25 that was discontinued a few years ago?

A: It doesn't seem to be any difference as far as I can tell. There is no information online and after shooting both, there is no significant differences in the look.