APS-C vs. Full Frame Sensor

Derek Smith • 4 August 2022
an aps-c mirrorless sensor
APS-C vs Full-Frame: What’s the difference?

Full-frame sensors measure the same as 35mm film, which is 36 x 24mm. Meanwhile, smaller APS-C sized sensors measure in at either 23.6 x 15.7mm (Nikon, Pentax, Sony, Fujifilm) or 22.2 x 14.8mm (Canon). That makes full-frame about 2.6x larger in terms of total surface area size.
As already mentioned, there is also Micro Four Thirds (17.3 x 13mm, MFT), and Medium Format (43.8 x 32.9mm).
 
Full-frame sensors can be found in the best full-frame mirrorless cameras, as well as many of the best DSLRs. You’ll even occasionally find a full-frame sensor in a high-end compact camera. Full-frame sensors are used by Canon, Nikon, Sony, Panasonic, Pentax, Sigma and Leica.

You’ll find an APS-C sensor in many of the best mirrorless cameras too, and they’re also commonly used in DSLRs. APS-C sensors are used by Canon, Nikon, Sony, Fujifilm and Pentax. Again, occasionally there are APS-C sensors found in high-end compacts.

The physical size differences lead to both advantages and disadvantages, which we’ll discuss in more detail below.

What is a crop sensor?
You might hear the term crop sensor from time to time, which simply means something which is smaller than full-frame. It’s a term which is most commonly applied to APS-C, but it can also be used to describe even smaller sensors, such as Micro Four Thirds, or even the smaller sensors that you find in compact cameras and smartphone – though it’s rare to hear those described as such.
What is a crop factor?
Crop sensors have a crop factor that you need to take into account when using lenses with your camera. When using a full-frame camera, whatever focal length is printed on the lens (for example 100mm) is what you’ll get when you shoot with it. However, when you use a smaller sensor, you’ll need to apply a “crop factor” to get the equivalent focal length.

Nikon, Fujifilm, Sony and Pentax APS-C sensors have a 1.5x crop factor, while Canon APS-C sensors have a 1.6x crop factor. Therefore, the 100mm lens mentioned above gives you an equivalent of either 150mm or 160mm – simply times the focal length by the appropriate crop factor.

Other sensor sizes have different crop factors. A Four Thirds sensor has a 2x crop factor (100mm becomes 200mm), while a one-inch sensor has a 2.7x crop factor (100mm becomes 270mm). It also works with bigger than full-frame sensors too – medium format has a 0.79x crop factor, which would make a 100mm lens equivalent to 79mm.

List of sensor crop factors:
Medium format = 0.79x
Full frame = 1x
APS-C (general) = 1.5x
APS-C (Canon) = 1.6x
Four Thirds: 2x
One inch = 2.7x
What are the benefits of APS-C?
When it comes to image quality, it’s a general rule of thumb that a bigger sensor equals better performance – but there’s plenty of advantages to APS-C, usually depending on what exactly it is you want from your camera.

One of the big advantages is that APS-C systems are normally smaller and lighter than full-frame equivalents. With smaller bodies and smaller optics, it’s a good choice if you don’t want to carry heavy gear, such as while travelling or for hiking long distances. If you want to shoot handheld, it can be easier to keep smaller and lighter bodies stabilised, too.

On that note, the crop factor also means that your longer lenses don’t need to be as long, heavy, or expensive as full-frame equivalents to get you closer to the action. That’s why cameras such as the recently announced APS-C cameras Fujifilm X-H2S and the Canon EOS R7 have been pitched strongly as wildlife and action cameras.

Speed is also something that is generally easier to achieve with APS-C, especially at affordable prices. Cameras like the Canon EOS R7 offer up to 30fps shooting, in a camera which costs a fraction of the price of similarly speedy models, such as the Nikon Z9 or the Canon EOS R3. That gives ordinary amateur photographers without the big budgets of professionals the chance to capture fast-moving action in a much more affordable fashion.

Does sensor size matter?
Having a smaller sensor can give other benefits as well, and here’s an example which illustrates the cost and weight advantage of using APS-C, particularly when looking at the whole system, which includes the camera and lenses.

APS-C system: Fujifilm X-H2S, plus 16-55mm f/2.8 and 100-400mm f/4.5-5.6 costs £5200 and weighs about 2700g.

Full-frame system: Nikon Z9, plus 24-70mm f/2.8 and 100-400mm f/4.5-5.6 costs £8800, and weighs about 3500g.
To sum up, the main advantages of APS-C cameras are:
Cheaper
Faster
Smaller
Lighter
APS-C cameras are best for:
Wildlife photography
Sports photography
Travel photography
Street photography
Photographers on a budget

What are the benefits of Full Frame?
Full-frame is often seen as the “gold-standard” for many photographers, with APS-C often thought of being the preserve of enthusiasts and those with a lower budget. While that’s not strictly fair or accurate these days, there are lots of advantages of using a camera with a larger sensor.

If the best image quality is your main concern, then generally speaking, full-frame will help you achieve that in a wider variety of settings. Low light performance is generally better, as is dynamic range for the most part.

If you crave super high resolution cameras, you’ll only find them with full-frame (and larger sensors) too. APS-C tends to max out at around 26-32 megapixels, whereas full-frame offers up to and beyond 50 or 60 megapixels (you can go even further with medium format, where you can now get 100 megapixel sensors). This generally makes full-frame better suited to high-detail type shots, as well as giving you more flexibility when it comes to cropping in post-production while still maintaining a high pixel count.

It’s easier to achieve a shallow depth of field when using a full-frame sensor. Although you can achieve the same look when using crop sensors, you might need to get too close to the subject for the same kind of background blur. It’s generally why portrait photographers, for example, prefer to use full-frame.

When it comes to using your lenses, knowing exactly what you’re getting (i.e. 100mm = 100mm) when shooting full-frame is more straightforward. That also means if you’re using older / vintage lenses from DSLR or even film days, you know exactly what you’re getting when using them on mirrorless full-frame models.

To sum up, the main advantages of full-frame cameras are:
Better image quality
Higher resolution
Easier shallow depth of field effects
Straightforward to understand lens focal lengths
Full-frame cameras are best for:
Landscape photography
Portrait photography
Low light photography
Studio photography
Which should I buy – APS-C Vs Full-Frame?

There’s not necessarily a right or wrong answer when it comes to full-frame vs APS-C and deciding which you should buy. You should think about the types of subjects you like to shoot, the budget you have available, and how much bulk and weight you are prepared to carry around.
If you’re a landscape photographer, for example, looking for a high-resolution camera which can deliver exceptional dynamic range, and you also want to shoot in low light, then full-frame is the obvious choice. Similarly, if you’re a portrait photographer who wants the best resolution and easy-to-achieve shallow depth of field effects, full-frame is the way to go.

On the other hand, if you’re a wildlife or sports photographer and don’t want to splash out on a super-expensive full-frame camera, but you do want to get close to the action, use fast-frame rates and carry something small and lightweight, then APS-C is probably the more sensible option. Travel photographers who don’t want to unnecessarily weigh themselves down might also choose to opt for APS-C, or Micro Four Thirds for an even smaller system.

To conclude, the simple truth is that no, not every photographer needs full-frame. While the larger sensor will provide higher image quality in lots of different scenarios, you’ll also have to pay the price for it both in terms of cost and size and weight. For that reason, many will be served just as well, if not better, by choosing a crop camera.


Louth Photographic Society

by Derek Smith 23 April 2026
Last night, we held our monthly print competition with the categories of "Circles" and "Open". Our judge for the evening was John Whaler, who judged the prints in his usual detailed laid back considered style. The "Circles" category was an especially difficult subject to photograph, and it was amazing to see some of the interpretations of this subject. It was an interesting evening, and the Competition page of the website has been updated with the final results, and images from the top three placed images in each category. Congratulations to Robin Begley placed first in the Open category with his "Pointe La Achenal - Mont Blanc, and Dave Turner with his view of the London Eye, first place in the Circles category. Thanks to John Whaler for judging the prints, and Dave Mann for preparing the refreshments.
by Graham Harrison 19 April 2026
Good Morning All I took a photo of the Morris Minor steering wheel in The Great British Car Journey Museum in Derbyshire; it would have fitted this week's competition if I had thought to print it. Last week at the club Derek organised a studio evening for us all. It was a very good evening with two models for us to photograph. A lot of members don't do studio photography very often, so it was a chance to learn lighting techniques and poses. Thank you Derek for letting the members use your studio equipment and organising the evening for us. There is a blog on our website. Last Friday evening was our open night at Louth museum for the societies 70th Anniversary, we had a good turnout with quite a few members and guests including the mayor of Louth. Thank you again to all involved setting up the exhibition, particularly Harry Kerman and Chris Birchmore who did a lot of the setting up, as well as Simon Millson, Derek Smith and Richard Hildred who helped with the boards and mounting the prints. Harry and Karen Kerman provided an excellent buffet as well as wine etc. It was the first time I had seen the exhibition and I was very impressed; there is plenty of time still to visit the museum and see it for yourself. You will have to pay the museum admission charge. There is a report on our blog page. This week, Wednesday 22nd April, we will hold a print competition, with the categories of "Circles" and "Open", John Whaler of Lincoln will judge the competiton. The entries are in and score sheets have been sent out. The following week we are holding a charity night in aid of Cancer Research, The society recently lost two very valued members to cancer, many members have lost loved ones to the disease. We are having various activities to take part in and spend your money. Harry is running a raffle, any members who would like to donate a prize please bring it along this week or next and hand it to Harry. Paul Towmey is bringing his Quoits game in. Dave Turner is running a very simple Print competition, bring along your favourite print or one that has done well for you in the past either this week or on the night, there is a £1 entry fee, any subject, we will ask a guest to judge the competition. I will be running a quiz and there will be cakes available to have with your tea and coffee, at a cost of course, we want to raise some money, there will be no charge on the door though. If you can't make the evening, you could always give Harry some money for raffle tickets this week. If you intend to go to our annual dinner on 29th May (Friday) please let me know by next Wednesday as I have to give the Splash the final numbers, so far 19 are going but mid twenties would be better. Think that's it, Regards Graham
by Harry Kerman 18 April 2026
Yesterday evening the 17th April 2026 was the opening night for the Louth Photographic Society’s 70 Year Celebration Exhibition at the Louth Museum. The Mayor of Louth, Darren Hobson attended and was very impressed with the exhibition, who by the way is interested in photography. Some relatives of previous members, who are no longer with us, also came along. Julie Gough (Milli) and Bob Maddams represented the Museum. From the club we had 10 members, some with their partners. In all 20 people attended. A buffet and drinks were provided by the club which were prepared by Harry and his wife Karen for the night. Graham Harrison the President of the club gave the opening speech followed by Chris Birchmore, who was the member who first put the idea together. Members mingled, discussed the photographs and generally had a good time. Many thanks for all who attended and made it a night to remember.
by Derek Smith 16 April 2026
Two female models were booked for our "Studio Night", which was held last night, and members were able to practice photographing the models in various poses, on the portrait set, or the fashion set. Our models Ginny, and Dina were very different in character, and appearance, but both were excellent models, and they posed easily in front of the cameras. The portrait set was lit with a flash speed light in a soft box, the fashion set was lit with constant LED lighting, the models changed outfits, and sets during the break. Both models are pictured here on the fashion set, Ginny in the red top, and large Doc Martin boots, and Dina in a softer fashion outfit. Members seemed to enjoy the evening, and for some glamour photography was outside their comfort zone, but it does give the opportunity to try something different.
by Derek Smith 14 April 2026
It was a disappointing afternoon for Louth during Sunday's Fosters Challenge. One by one our submitted prints were dismissed, Graham Harrison's "Hairy Shield Bug", was too dark, "Trusthorpe Outfall" by Tony Gaskins had wind turbines on the horizon, and Tony's other print "Dawn Light Outfall Hornsea" was dismissed as the outfall was too close to the bottom of the frame. "Rudbeckia" by Harry Kerman fell as the judge felt that the third flower in the background was unnecessary. "Morning Sun Whitby" by Dave Turner was dismissed as the rising sun "caught his eye". Oh well, there's always next year. The winning print was a stunning portrait, "Maria" from Scunthorpe, which I felt had vibes of the Vogue magazine.
by Graham Harrison 12 April 2026
Good Morning All We had a really good week away last week in the Peak District, the good weather helped and we visited many places including Salford Quays and climbed to the top of Kinder Scout and Mam Tor. Last week at the club it looks like you were treated to some excellent coastal photography from member Tony Gaskins, Tony does a lot of long exposure photography producing stunning photographs. There is a report on our blog page with photographs from the evening. This week, Wednesday 15th April, is Derek's studio evening where we are invited to come along with our cameras, there is a £5 charge on the night to help pay towards the two models. The following week is a print competition, with the categories of "Circles" and "Open", you can send Dave Turner a list of your entries and bring your prints in next week. Today is the Foster Challenge at Nettleham village Hall, 1.30pm for 2pm, Louth has entered the competition as usual so it would be good to see a few members attending. Regards Graham
by Derek Smith 9 April 2026
Our speaker last night was our very own member Tony Gaskins, who gave an excellent presentation "Coast 3" with some stunning visual images. Tony specialises in capturing long exposure coastal scenes, he related how beginning several years ago with a long exposure view of Whitby Pier he got the "bug" for long exposure photography. Much of his photography takes place along the Lincolnshire, and Yorkshire east coast, often arising in the early hours to catch a sunrise. Weather conditions dictate a lot of how the final image looks, and the long exposure style often creates a sense of calmness, and serenity, with pastel coloured skies, and milky seas. When the weather turns wild, the long exposure image presents a very dramatic scene with foreboding clouds. He recently travelled to Lewis & Harris island in the Outer Hebrides and took many images there, sometimes at sunny white sand beaches, and at other times moody bleak images as the weather closed in. Tony's technique requires a lot of patience, often spending hours at a location, with the camera mounted on a study tripod, and the ND filters on the camera permitting an exposure time of several minutes. Many thanks Tony for a very informative talk, well presented, and with some beautiful imagery.
by Graham Harrison 5 April 2026
Good Morning All Last week at the club we held a Local Nature and Open PDI competition, members Dave Turner and Steve Chapman kindly offered to judge the competition, thank you to you both, it was a good night and the entries were of a high standard giving you both quite a task. The results are on our website, but the two winners on the night were, Local Nature Tony Gaskins and Open Harry Kerman. This week, Wednesday 8th April, Tony Gaskins, one of our members is showing us Coast 3, a PDI presentation. Tony is an excellent photographer and spends many hours photographing our coastline. Aprils Print competition, Circles and Open is fast approaching, you can send your titles to Dave Turner when your ready and bring your prints in the week before the competition. Regards Graham
by Derek Smith 2 April 2026
It was no April fools, when we held our PDI (Projected Digital Image) competition last night. The images submitted into this competition were off the highest quality. Dave Turner judged the Open category, which I think is always one of the hardest categories to judge, pitting landscapes, against nature, and still life, but Dave did a magnificent job, offering well founded critique of the images submitted. After the break, Steve Chapman judged the Local Nature category, (nature images taken within a 25 mile radius of St. James' church, Louth) Steve "held back" 10 out of the 18 submitted images, and gave those 10 images very careful consideration until he finally arrived at the 3 highest placed images. Steve commented that the submitted images were indeed of high quality, and he took his time to evaluate the submitted images and offered useful critique on each one. The competition made for a very interesting evening, and all members deserve praise for the quality of the submitted images. The website Competition page has been updated with the full results, and the top three images from each category. On this post is 1st placed Sedge Warbler, Cleethorpes by Tony Gaskins, in the Local Nature category, and 1st placed Hudson Bay Wolf, (Lincoln Zoo) by Harry Kerman, in the Open category.
by Graham Harrison 29 March 2026
Good Morning, All, Last week at the club member Chris Birchmore gave a presentation on MPP cameras which included some of Chris's collection of cameras and prints taken. There is a report on the evening on our blog page. Thank you Chris for an interesting evening. This week, Wednesday 1st April, we are holding a local and open PDI competition the local subject being nature, please if you haven't already, send your entries to Harry before midnight tonight. Members Steve Chapman and Dave Turner have volunteered to judge. Also on the Wednesday 1st April our Louth Photographic Society 70th anniversary exhibition will be open to view at the Louth Museum. Regards Graham