120 Rollei Ortho 25
Product information
120 Rollei Ortho 25| Manufacturer | Rollei |
| Film | Ortho 25 |
| Type | Black and White |
| ISO | 25 |
| Format | 120 Medium Format |
Rollei Ortho 25 120: Extreme Resolution in Medium Format
Capturing microscopic detail demands a radical emulsion. The Rollei Ortho 25 120 is a technical film with very low sensitivity designed to extract maximum optical sharpness from your lenses. Its extreme silver density and total absence of grain make it mandatory ammunition for scientific photography, macro, static landscapes with a tripod and art reproductions in 6×6 cameras.
What makes the Rollei Ortho 25 in 120 so special?
Its uniqueness lies in two factors: its ISO 25 and its orthochromatic spectrum. Being blind to red light, this film reinterprets reality. Warm tones (woods, bricks, lips) darken dramatically, while blue skies and foliage gain a vibrant luminosity. In addition, this very low ISO guarantees edges so sharp that your medium format scans will seem to have been captured with hundred-megapixel digital sensors, preserving a purely analog soul.
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Orthochromatic aesthetics also in 35mm.
If you love the extreme microscopic sharpness and the strong contrast of this clinical emulsion, squeeze it every day. Get this same red-blind film roll in standard 35mm format to give your SLR gallery-quality.
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Technical Specifications and Basic Comparison
Mastering such a strict technical emulsion demands lighting rigor. We break down the exact photochemical radiography of this high-resolution gem.
- Format: Medium Format (120).
- Nominal sensitivity: ISO 25 / 15° (Extremely slow).
- Emulsion type: Orthochromatic black and white (Blind to red).
- Base support: Synthetic polyester (PET) ultra-clear.
- Development: Standard B/W chemistry (Allows handling under red light).
| Feature | Rollei Ortho 25 120 | Ilford Ortho Plus 120 |
|---|---|---|
| Sensitivity (ISO) | 25 (Requires tripod almost always) | 80 (More versatile handheld) |
| Native Contrast | Extreme (Documentary/Technical) | High (Pictorial) |
| Optical Resolution | 330 line pairs/mm (Brutal) | Very high |
Technical Variables of the Film
- Contrast and Tonal Range: Wild natural contrast. Originally conceived to copy documents, its blacks are abyssal and the whites stinging. It requires highly diluted developers to achieve photographic grays.
- Spectral Sensitivity: Strict orthochromatic. It absolutely blocks red wavelengths. It radically transforms Caucasian portraits, generating an old and textured look.
- Grain Structure: Microscopic grain. Visual noise is mathematically nonexistent in the 120 negative, offering unparalleled crystalline purity.
- Acutance: Surgical. The absence of red light dispersion in the emulsion causes edges to be cut as if they were traced with a scalpel.
- Resolution (Resolving Power): Unsurpassable. Its resolution limit frequently exceeds the capacity of the lenses of medium format cameras themselves.
- Push/Pull Flexibility: None upward. Pushing this film is destroying the image. However, it supports Pull (ISO 12) to tame its very strong contrast.
- Base Support and Antihalation Layer: Break-resistant PET. It lacks the traditional thick layer, using dyes that dissolve easily, leaving an ultra-transparent base.
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Why buy your Rollei Ortho 25 120 at Camera Market?
We have accumulated more than ten years battling with technical and industrial emulsions in our own tanks. We are real active analog professionals. We know that an ISO 25 film requires scrupulous thermal stability so it doesn't fog or lose speed. We keep all our Rollei stock in climate-controlled refrigerators. We dispatch your medium format orders quickly within 24/48 hours with protective packaging. If you have doubts about which compensating developer to use, an expert technician will advise you by phone with no obligation.
Advantages and Disadvantages of Rollei Ortho 25 in 120
| Advantages (Pros) | Disadvantages (Cons) |
|---|---|
| The highest resolution commercially available in 120 format. | Very restrictive ISO 25 sensitivity; requires a tripod and static subjects. |
| Allows loading the reel comfortably under red safelight. | Critical latitude; the slightest underexposure generates black shadows without detail. |
| Crystalline PET base that facilitates direct scanning without interference. | Uncontrolled contrast ruins photos if diluted chemistry is not used. |
Comparison Table: Rollei Ortho 25 versus special 120 film rolls
| Special 120 Film | Speed and Resolution | Spectral Sensitivity |
|---|---|---|
| Rollei Ortho 25 120 | ISO 25 / Extreme Sharpness (Technical) | Orthochromatic (Blind to red) |
| Ilford Ortho Plus 120 | ISO 80 / Very High Sharpness | Orthochromatic (Blind to red) |
| Ilford Pan F Plus 120 | ISO 50 / Clinical Sharpness | Standard Panchromatic |
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Development Times for Rollei Ortho 25 120 (at 20°C)
Taming the aggressive contrast of this material demands extreme dilutions. We show you the verified lab times to process successfully at home.
| Developer | Dilution | Exposed ISO | Time (Minutes) |
|---|---|---|---|
| Adox Rodinal | 1+50 | 25 | 10 min (Ideal for photographic tones) |
| Rollei RLC (Low Contrast) | 1+4 | 25 | 12 min |
| Kodak D-76 / ID-11 | 1+1 | 25 | 8.5 min |
| Kodak HC-110 | Dilution H | 25 | 11 min (Do not use Dilution B, too strong) |
Camera Market Pro Tip: The document contrast trap
Dozens of novice customers develop Rollei Ortho 25 with standard undiluted chemicals (such as D-76 Stock) and call us alarmed because their landscape photographs look like barcodes: they only see white and black silhouettes with no trace of mid-grays.
The obligation of the compensating developer: The genetic base of this emulsion is the copying of plans and microfilms. If you use energetic chemicals, the contrast shoots to infinity. To obtain a beautiful photographic image with broad grays, it is imperative to use the compensation technique. The most affordable magic formula is to use Adox Rodinal at high dilution (1+50 or even 1+100) with very spaced agitation (once per minute). This very watery mixture exhausts quickly in the bright lights (preventing them from burning to nuclear white) but keeps acting patiently in the dark shadows, gifting you a spectacular tonal range in 120 format.
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Physical Behavior and Scanability
We address the handling of the synthetic support, being a transparent blessing for those who digitize at their own desk.
Planarity (Film Curl)
The polyester (PET) base used by Rollei is physically unbeatable. After drying properly, the medium format strip stays rigid and flat as glass. Forget the fights against bowed negatives. Inserting these cut strips into the plastic guides of your Epson Perfection scanner will be a very quick procedure, guaranteeing immaculate focus in all corners of the 6×6 frame.
Inversion profiles (Scanning)
Inverting the Ortho 25 in Negative Lab Pro is fascinating thanks to its crystalline base without gray dyes. Always apply low-contrast emulation profiles (Low Contrast or Linear). The emulsion already carries a fierce contrast; if you add digital contrast or the "Texture" sliders in Lightroom, you will blow out the whites and clog the blacks, destroying the delicate balance achieved in development.
At the Limit: Extreme Exposure and Zone System
Know the rigorous photochemical red lines of this clinical film to protect your compositions.
Reciprocity Failure
It suffers a vertiginous light collapse. From exposures of 1 second (something routinely easy at ISO 25), the chemistry demands massive corrections. If your light meter dictates 10 seconds, the emulsion will demand a whopping 50 actual seconds of compensated shutter speed. Arming yourself with a heavy carbon tripod is absolutely non-negotiable.
Extreme Push and Pull
It repudiates pushing with all its being. Trying to take this film to ISO 100 will annihilate the shadows, leaving them transparent and generating whites without information. Its nature clamors for Pull. Shooting it at ISO 12 or ISO 6, shortening its development, is a masterful practice to tame its brutal contrast and open up the range of grays.
Dynamic Range Map
It possesses a painfully narrow exposure latitude. It retains highlights brilliantly, but punishes any underexposure without mercy. If the dense shadow areas are not flooded with abundant photons, they will close into irreversible solid black. Meter the light by always metering the dark areas you want to save.
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Expert technical management Medium Format Lab.
Don't risk the destructive contrast of this material. Send us your exposed 120 roll for diluted compensating processing in the lab and a TIFF scan that will reveal its brutal optical sharpness.
Request Professional 120 Development
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Camera Market Pro Tip: The advantage of the red darkroom
Loading 120 film spirals inside a closed dark bag, guided only by touch, is the greatest source of stress, scratches and kink marks for any beginner in medium format.
The lifesaver of the spectrum: Take advantage of the chemistry of Rollei Ortho 25 in your favor. Being strictly orthochromatic, the emulsion is completely blind to red wavelengths. This means you can turn on an inactive red safelight (the same dark bulb you use for positive printing darkroom paper) and load the roll into your Paterson tank perfectly seeing what your hands are doing. Say goodbye to jams in the spiral and frustration; threading under red light is an analog luxury that this film gives you.
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Frequently Asked Questions about Rollei Ortho 25 120 (FAQ)
Why do lips come out so dark in portraits with this film?
Due to its orthochromatic nature, the emulsion is "blind" to red. This means that warm tones (lips, freckles and skin imperfections) are recorded as very dark grays or blacks. The result is a portrait with a spectacular pictorial and antique dramatism, very similar to that of photographs from the early 20th century.
Can I shoot Rollei Ortho 25 handheld without a tripod?
It is very risky. With an ISO 25, even in full sun, shutter speeds will be low if you want to stop down the aperture to ensure sharpness. Using a tripod is indispensable in medium format to exploit the microscopic resolution of this film and prevent a minimal shake from ruining the detail.
Can I use a red filter to darken the sky?
Under no circumstances! Being an orthochromatic film, a red filter will act as an opaque wall that will block all light to the negative, leaving it empty (transparent). If you want to modify the contrast of the sky, use yellow or green filters, or trust in the powerful native contrast of the film.
How much does it cost to develop this technical film roll at Camera Market?
We apply our base laboratory rate for manual black and white development in 120 format. We understand the demands of high-resolution films, so we use rigorous thermal control and compensating chemicals to obtain a balanced negative. Check our website to add TIFF scanning.
Can the polyester base damage my camera?
The PET base is extremely thin but virtually unbreakable. Unlike traditional acetate, it will not give way under tension. If your camera's advance mechanism jams, never force the lever; you could damage the internal gears before the film breaks. Act gently.
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Load while seeing what you're doing Red safelights.
Take advantage of this film's red blindness. Equip your darkroom with our red inactive lamps and wind your rigid PET negatives onto the developing reel while seeing every movement stress-free.
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Unlock unprecedented optical resolution
The Rollei Ortho 25 120 is the cult tool for photographers who demand to transcend the physical limits of analog sharpness. Its blindness to the red spectrum and its extreme silver density crown it as the non-negotiable ammunition for art reproduction, geometric architecture, and macro exploration in 6×6 format. Do not let visible grain cheapen the premium quality of your medium format lenses. Add select rolls to your cart right now and take advantage of our fast, insured, and climate-controlled shipping in 24/48 hours. Remember that our lab masters are eager to apply the exact Rodinal dilutions that will tame the brutal contrast of your masterpieces.
120 Rollei Ortho 25 is in <strong>perfect working condition</strong>. Each unit has been rigorously inspected by our specialized technical team, guaranteeing optimal performance.
The specific cosmetic condition (possible signs of use, superficial scratches, etc.) is detailed in the actual photos of the product and in the full description.
The purchase includes the 120 Rollei Ortho 25 and a <strong>warranty</strong> against manufacturing defects. As this is a second-hand product, accessories (caps, lens hood, case…) <strong>vary by unit</strong>.
Want to know exactly what this specific unit includes before buying? <strong>Message us via the website chat</strong> and we'll confirm right away.
All our products include a <strong>warranty</strong> covering any manufacturing defect or technical failure.
<strong>You can extend the warranty of your item:</strong>
- <strong>12 months</strong> of full coverage for only <strong>{price_12}</strong> (one-time payment)
- <strong>24 months</strong> of maximum peace of mind for <strong>{price_24}</strong> (one-time payment) — <em>recommended</em>
We also offer <strong>14-day no-questions-asked returns</strong>. If you're not completely satisfied, you can return it for a full refund.
At Camera Market, most of our items are imported from Europe, so orders can take up to <strong>14 calendar days</strong> to arrive at your address.
However, we offer expedited delivery of <strong>4 to 5 business days</strong> for selected products with immediate availability. All shipments include a <strong>tracking number</strong> so you can track your order in real time.
Comprar the 120 Rollei Ortho 25 reacondicionado y certificado en Camera Market te ofrece <strong>múltiples ventajas</strong>:
- <strong>Significant savings:</strong> Prices up to 40-60% lower than new, without compromising quality or performance
- <strong>Guaranteed quality:</strong> Each product is inspected, tested and verified by specialized technicians
- <strong>Warranty included:</strong> standard coverage, extendable with the optional extension
- <strong>Sustainable purchase:</strong> You contribute to the circular economy and reduce the environmental impact of electronics
- <strong>Accessible professional equipment:</strong> Get high-end models at more competitive prices
Our refurbished photography equipment maintains the same optical and technical performance as new. Depreciation does not affect image quality or performance, only the price.
