What is a crop sensor — and does it matter for beginners?
Full-frame vs APS-C vs Micro Four Thirds explained without the jargon. What actually matters for your photography.
Our picks in this guide
Live prices · region-matched retailer · affiliate links
Sensor size is one of the most talked-about specs in camera buying guides. It's also one of the most misunderstood. Here's what actually matters.
What is a crop sensor?
A full-frame sensor is the same size as a 35mm film frame — 36mm × 24mm. Everything smaller is called a "crop sensor" because it captures a smaller portion of the image projected by the lens.
APS-C sensors (used in most entry and mid-range cameras) have a crop factor of 1.5x or 1.6x. A 50mm lens on an APS-C body behaves like a 75mm or 80mm lens on full-frame. Micro Four Thirds sensors have a 2x crop factor.
Does it matter for beginners?
Honestly, not much. The difference in image quality between APS-C and full-frame has narrowed dramatically in the last five years. At typical viewing sizes — social media, prints up to A3, web — you will not see a meaningful difference.
Where sensor size matters is in low-light performance and depth of field control. Full-frame sensors produce less noise in dark conditions and allow shallower depth of field (more background blur) at equivalent settings.
The practical answer
Start with APS-C. The cameras are smaller, lighter, and significantly cheaper — both the bodies and the lenses. Move to full-frame when you've outgrown what APS-C can offer, which for most photographers takes years.
The best camera is the one you actually carry. A compact APS-C camera in your bag produces better photos than a full-frame camera left at home.
Which of these is right for you?
One question · matched from the 3 cameras in this guide
What trusted reviewers say
Affiliate links above — we earn a small commission if you buy, at no extra cost to you. Our recommendations are editorially independent.
What you'll also need
Whichever body you land on, these go in the bag with it. Battery shown fits the ZV-E10 II.
SanDisk Extreme PRO 128GB SDXC
200MB/s read, 90MB/s write — fast enough for 4K video and deep RAW bursts on any camera here.
The card is the one accessory nobody should cheap out on. A slow card turns a 30fps camera into a 6fps camera the moment the buffer fills.
Spare battery — Sony NP-FW50
For ZV-E10 II, A6400, older A6000-series.
The FW50 is a small battery — on these bodies a spare is genuinely required, not optional.
Lens cleaning kit (blower, pen, microfibre)
Air blower, carbon lens pen, and microfibre cloths. The three things that live in every working camera bag.
Dust on the front element is the most common cause of soft-looking images from a perfectly good lens.
Peak Design Slide Lite strap
Quick-adjust sling strap with anchor links. Swaps between bodies in seconds.
The strap in the box is the first thing most photographers replace. This is the one you buy once.
Affiliate links — we earn a small commission if you buy, at no extra cost to you. These are the accessories we actually carry, not sponsored placements.
About the author
Philip Isaksen
Real estate & marine photographer · co-founder
Norwegian real-estate and motor-boat photographer. Portfolio at philipfoto.no.
Related guides
By Philip Isaksen · 4 min
Do you need a UV filter on your lens?
The honest answer: probably not. But there are specific situations where one makes sense — and buying the wrong one makes things worse.
By Philip Isaksen · 11 min
Best Sony mirrorless cameras in 2026
A working photographer's guide to the Sony Alpha lineup in 2026. From the €699 ZV-E10 II to the €2,499 A7 IV — which Sony E-mount body is right for what you actually shoot.
By Halvor Barndon · 11 min
Best cameras for content creators (2026): Instagram, TikTok, YouTube
A working photographer's guide to the camera kits that actually keep up with multi-platform content — vertical video for TikTok, horizontal for YouTube, stills for Instagram, all from one body.