Nikon D5 DSLR used by Artemis II crew

The amazing photographs of the Earth in the distance and the dark moon in the foreground were taken with a Nikon D5 DSLR and perhaps the Nikon Z9 (mirrorless).

The  D5 was first introduced 10 years ago but was selected for its ruggedness and  proven radiation resistance and reliability in space.

The Z9 was a last minute addition on the insistence of  Commander Reid Wiseman. It is being tested for possible use in future missions.

Now you know! Afterthought: the D5 takes a bit of controlling. You need to know a bit about photography and operating this pro camera to get the best out of it. The astronauts must have been specifically trained to use it.

Here is some info about the D5:

The Nikon D5 is one of those rare machines that earns its reputation the hard way: through absolute reliability in punishing conditions. Introduced in January 2016, it was built as Nikon’s flagship DSLR for professionals who needed a camera that would never quit, whether on a battlefield, a frozen tundra, or—remarkably—a deep‑space mission a decade later. Its 20.8‑megapixel full‑frame sensor may seem modest by modern standards, but that’s part of its strength. The pixel pitch is large, the circuitry is robust, and the sensor architecture is far less fragile than the ultra‑dense designs found in newer mirrorless bodies. That durability, combined with a magnesium‑alloy chassis and legendary weather sealing, makes the D5 a photographic tank.

Its EXPEED 5 processor delivers fast, predictable performance, and the 153‑point autofocus system remains one of the most dependable ever made. The camera’s ergonomics—deep grip, tactile buttons, and intuitive layout—were refined for professionals who shoot instinctively, often without looking away from the viewfinder. In low light, the D5 is a monster, producing clean files at ISO levels that would cripple lesser cameras.

What ultimately defines the D5 is trust. Photographers know it will fire, focus, and survive. NASA choosing it for Artemis II simply confirms what professionals have known for years: the D5 is built for environments where failure is not an option.

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P.S. please forgive the occasional typo. These articles are written at breakneck speed using Dragon Dictate. I have to prepare them in around 20 mins. Also, sources for news articles are carefully selected but the news is often not independently verified. And, I rely on scientific studies but they are not 100% reliable. Finally, (!) I often express an OPINION on the news. Please share yours in a comment.

What focal length is a 35mm lens on an APS-C camera?

When you use a 35mm lens on an APS-C camera, the effective focal length is determined by the camera's crop factor. The crop factor for most APS-C cameras is typically around 1.5x (for Nikon, Sony, and others) or 1.6x (for Canon).

To calculate the effective focal length:

Effective focal length = focal length X crop factor.

For a 35mm lens on a 1.5x crop factor APS-C camera:

35mm x 1.5 = 52.5mm

For a 35mm lens on a 1.6x crop factor APS-C camera:

35mm x 1.6 = 56mm

So, the effective focal length will be approximately 52.5mm on a 1.5x crop factor camera and 56mm on a 1.6x crop factor camera.

The simple reason why I have written this short post is because I just did a quick search on the Internet for the 35mm equivalent on an APS-C camera (popular on mirrorless cameras) and the answers that I got were confusing as far as I am concerned 😊. They were back to front. It looked chaotic to me. Maybe its me! It is the way you present the information and I hope this way is good.

In short, the answer has to be that if you use a 35mm lens designed for a full frame camera the effective focal length on a cropped sensor camera has to be longer because you're taking out the middle of the frame. It's a bit like a digital zoom. You are cropping the picture digitally in effect. 

This means that you are zooming-in which means that the focal length is longer from 35mm on full-frame to to a little over 50 mm on APS-C. 

So a 35mm lens on a full frame camera which is a wide-angle lens, becomes a standard lens on a cropped sensor camera such as the APS-C format.

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P.S. please forgive the occasional typo. These articles are written at breakneck speed using Dragon Dictate. I have to prepare them in around 20 mins. Also: sources for news articles are carefully selected but the news is often not independently verified. Also, I rely on scientific studies but they are not 100% reliable.