ISO Performance:

The X-Pro 1 doesn’t disappoint throughout it’s ISO range. At lower ISO values, both it’s recoverable shadow detail and high ISO performance is very good by my standards, and I wouldn’t hesitate to shoot it on Auto-ISO. In fact, Auto-ISO was set to “on” for the majority of the loan period.

The perceptive noise increases gradually from base ISO up to the maximum of ISO 6400, at which point it still performs splendidly. Chroma noise levels are kept very low, and the luminance noise is not annoying. Luminance noise isn’t tightly packed and fine, but rather larger and a little clumpy compared to what I’m used to with my Nikon D700. I’m sure a large part of this has to do with Adobe’s rather poor RAW demosaicing algorithm (currently ACR 7.1).

The only long exposures I took were at high ISO values. Unfortunately I didn’t test for very long exposures at base ISO, but judging by the long-exposures at higher ISO’s, I would think it would do very well with exposures of around 5 minutes at base ISO, without LeNR. I took a few 30 to 120 second long-exposures at ISO 6400, and the noise levels were very good. However, with these exposures, the camera’s JPG engine falls short of what ACR 7 delivers. ACR 7 maps out any odd pixels, which eliminates a lot of work cloning out the dots afterwards. The LR4 RAW conversions also produced cleaner files, will less blotchy chroma noise.

The odd pixels seen in the JPG files are more prominent in the darker areas, and while they are not bright and colourful, they are still irritating image artefacts.

Please note, long exposure noise reduction (LeNR) was set to ‘off’ for all the images I took...

Below is an example comparing the camera’s JPG output with LR4‘s RAW file conversion. The exposure was 127sec f/2.8 at ISO 6400.

On the left are two sample images exposed for approximately 20 sec at f/2.8, ISO 6400.

For the image on the far left, I used my iPhone camera LED flashlight to illuminate the scene, which gave the foreground an unpleasant green tint. Compensating for this, using the white balance adjustment, gave the night sky it’s magenta tint.

Working at lower ISO values leaves a lot of headroom to fill in shadow detail. Exposing to the right is often the best method of exposing, but one needs to bare in mind not too take it too far, as the headroom for highlight recovery is smaller. It’s reassuring to know that the X-Pro 1 has a lot to offer when pushing the shadow details, and at the same time maintaining pleasant noise levels and detail.

Below is an example where I pushed the shadows (+ 91) and pulled the highlights (- 82) in LR4. As you can see, the image came a long way compared to the out-of-camera JPG file. The shadows are clean, and image quality is still in tact.

Please note that X-Pro 1 jpg files have lens distortion corrections applied, while the LR4 conversions don’t.

Below are more sample images of various ISO values and/or larger amounts of shadow/highlight recovery...

Below is an example where I pushed the exposure (+ 2,45), pushed the shadows (+ 91) and pulled the highlights (- 67) in LR4.


ISO 800

ISO 200 with shadow recovery

ISO 200 with shadow & highlight recovery

ISO 6400 with +1.2 stop push

ISO 1600 with shadow & highlight recovery

ISO 200 with highlight recovery