The M9 was the first full-frame digital Leica M, and in 2026 it's the cheapest way into one. It's also a camera from 2009 with a sensor that famously corroded, a screen that looks like a flip phone, and a battery that doesn't last a long afternoon. People still ask us for it every week. Here's an honest take on when the M9 is a smart buy and when it's a mistake.
The short answer
Worth it if…
- You want the CCD colour and you've seen it and liked it
- The body has a documented replacement sensor
- You shoot in daylight or up to ISO 800 and don't need live view
- You treat it as a film-camera-with-a-card, not a modern digital
Skip it if…
- The seller can't tell you whether the sensor was replaced
- You shoot a lot after dark or above ISO 1600
- You want live view, a usable screen or all-day battery
- You're buying it only because it's cheaper than an M10
What you're actually getting
| Leica M9 (2009) | Leica M10 (2017), for reference | |
|---|---|---|
| Sensor | 18MP full-frame Kodak CCD (KAF-18500) | 24MP full-frame CMOS |
| ISO | 160 – 2,500 (80 as a pull setting); really an ISO 160 – 800 camera | 100 – 50,000 |
| Live view / video | None / none | Live view yes / video none |
| Rear screen | 2.5" LCD, 230k dots | 3" LCD, 1.04M dots |
| Shutter | Mechanical, up to 1/4000s, about 2 fps | Mechanical, up to 1/4000s, 5 fps |
| Battery | 14464 (shared with the M8), roughly 300–400 frames in practice | BP-SCL5, noticeably better |
| Storage | SD card under the baseplate; sticks to older, smaller cards best | SD card under the baseplate |
| Body thickness | Thicker than a film M; same as the M8 and M240 | Back to film-M thickness |
| Typical used price | Roughly $2,000 – $3,200 depending on sensor status and variant | Roughly $3,500 – $4,500 |
Prices on the M9 vary more than on any other digital M because of the sensor question below. See what M9 and M9-P bodies have actually sold for on Aperture.market, and compare with the M10 before you decide the gap is worth it.
The sensor corrosion issue, explained once
The original M9 sensor has a cover glass whose coating could corrode, showing up as small spots or patches in images, usually first visible at small apertures against a plain sky. It affected the M9, M9-P, M-E and M9 Monochrom, since they share the sensor. Leica acknowledged it, first offered free replacement, then moved to a paid replacement with a redesigned, corrosion-resistant sensor, and then ended the program once replacement stock ran out. There is no official fix available today.
That changes how you buy. A body with the replaced sensor is a camera you can own for years. A body with the original sensor that hasn't corroded yet might never show it, or might show it next summer, and either way you can't get it swapped. So the first question to any seller is: was the sensor replaced, and can you show the Leica service paperwork? Many sellers will say "no issues" because they haven't looked. Ask for a photo of a white wall at f/16, and open the full-size file. You're looking for faint, slightly irregular spots that don't move between frames and don't clean off, which is different from ordinary dust.
"An M9 with a replaced sensor is a known quantity. An M9 with an original sensor is a bet, and you should pay like it's a bet."
The CCD look: real, but not magic
The M9 is the last CCD-sensor Leica M, and its files have a reputation. The reputation is partly earned. At base ISO the colour is dense and slightly cooler-blue than the CMOS bodies, skin tones land in a place that a lot of people find flattering straight out of camera, and the files have a certain hardness to them that reads as "digital Kodachrome" if you're inclined that way. The look is strongest in DNG with a light touch in editing.
What it isn't is a free lunch. The dynamic range is limited by modern standards, highlights clip without much warning, and by ISO 1600 you're into noise and colour shifts that no amount of mystique makes pretty. A lot of what people love in M9 files can be reached from an M10 file with a profile and five minutes of work. If you've shot both and still prefer the M9, buy the M9. If you've only seen samples online, borrow one first.
Living with it day to day
There's no live view, so you focus with the rangefinder and only the rangefinder, which most M9 buyers consider a feature. The 2.5-inch screen is fine for checking the histogram and nothing else; judge sharpness on a laptop, not the camera. Battery life is the thing that genuinely annoys people: budget on two or three spare 14464 batteries, which are still available, and note that the M9 doesn't charge over USB. Write speed is slow, so don't expect bursts, and the camera is picky about large, fast SD cards, so most owners run 16–32GB cards. The shutter is loud by M standards, louder than the M10 and much louder than the M10-P.
None of that is a dealbreaker if you came for the slow, deliberate rangefinder experience. It is a dealbreaker if you wanted a modern camera with an M badge, and the M10 is the first body where that stopped being a trade-off (we cover it in our M10 vs M11 guide).
Which M9 to buy
Four variants share the same sensor and guts. The standard M9 is the most common and cheapest. The M9-P (2011) drops the red dot, adds a sapphire-glass screen cover and a top-plate engraving, and tends to sell for a few hundred more; the sapphire screen is a real benefit on a camera this old because the standard screen scratches. The M-E (2012) is a stripped M9 in anthracite grey without the frame-line preview lever or USB port, and is often the best value because it looks less "collectible." The M9 Monochrom (2012) is a black-and-white-only sensor with its own cult; it's priced well above the colour bodies and corrosion inspection matters just as much.
What to check before paying
Sensor paperwork first, as above. Then the rangefinder: focus on a vertical edge at infinity and at 0.7 m and make sure the patch aligns in both; M9 rangefinders drift and adjusting one is a paid job. Look for the dreaded "sticking" shutter at slow speeds, make sure the SD slot door and baseplate lock close cleanly, and confirm the battery contacts aren't corroded. Check the LCD for the delamination and scratches that affect early non-sapphire screens. Ask for the shutter count, which the M9 reports in the menu. And budget for a Leica-trained technician to check the rangefinder within the first year regardless.
Our condition guide explains how sellers on Aperture.market describe bodies and what "replaced sensor" should mean in a listing. Buying locally matters more for an M9 than for almost any other camera, because the sensor test is something you want to do yourself. Aperture.market charges zero commission and shows each seller's location, so you can meet up, shoot a white wall, and decide with the file in front of you. The rangefinder listings are the place to start.