APS-C vs. Full Frame Sensor
Derek Smith • 4 August 2022
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
Good Morning All Last week we went to have a look at the Lancaster sculpture at Norton Disney, it is open for visitors at certain times and although work is still ongoing the main Lancaster is finished and a car park in place. The sculpture is full size weighing 100 tons and honours WW2 RAF crews. Last week at the club Derek Smith ran an editing night, members were asked to bring their laptops in and Derek gave us all an SD card with some images to edit and information regarding the free editing software. A different and interesting night and hopefully we all learnt something and anyone new to photography would have learnt quite a lot. Thank you Derek for running the evening. This week, Wednesday 11th February, we have one of the clubs yearly highlights, the Print Of The Year (POTY) competition to be judged by Grahame Dunkin, all the entries are now in and you should have checked the scoresheets to make sure yours are included. Dave Turner is also asking for prints to enter into the Foster Challenge and LPA Print Battles. He will ask to use prints that are in the print of the year but if you have any prints that you think would be good to enter in the two competitions please bring them and hand them into Dave Turner. The following week we are having an evening collecting everything in for our exhibition at the Louth museum, if you can sort out any prints especially local prints that could go into our exhibition please bring them in on the 18th February. Regards Graham
Last Sunday I was in Stockton on Tees working with Izzy, a favourite model of mine she enjoys cosplay, that’s dressing up as a character from Marvel, Hasbro, or film titles. This photo is of Fey, a woodland sprite, pictured against a woodland backdrop that I bought for the photoshoot. I stayed overnight at a Premier Inn, and in the morning drove to Staithes, as I had always wanted to visit this fishing village, Staithes in the February rain wasn’t much fun, and the tide was out, but I did manage to take a few photos, and I captured one for the “Water” project so I was pleased with that. I was quite surprised how vibrant the colours were in the drizzle, and misty light. Driving back over the North Yorkshire Moors in rain, and fog, didn’t allow for much photography either. Yesterday, walking along the harbour front in Bridlington the high tide, and strong winds had thrown lots of debris onto the promenade, seaweed, nets, tree branches, and cuttlefish kept council workmen busy clearing up the mess. With the right clothing, and a weatherproof camera photography can still be enjoyed even in poor conditions.
A photo editing workshop was held last night, with members bringing in their laptops, and post processing sample images. Members were able to practice processing bracketed, and focus stacked images. Simple editing tasks of cloning unwanted items from images, cropping, and resizing of images were shown. The excellent FastStone photo viewer, and editor was able to accomplish most tasks apart from developing of RAW images, this free software is a “must have” for those with Windows computers. The Affinity photo editor has now been acquired by Canva, and the changes applied by Canva have made the software very confusing to use, and on my 14” Lenovo Thinkpad, it was very difficult to view the master layer to apply adjustments. PhotoScape X is a simplistic photo editor, for all that the software was easy to use, and the RAW processing was seamless. It was an interesting evening, and hopefully members will have attained some new skills in post processing, some of the images edited are shown here.
Good morning All I did manage to get to visit Gibraltar Point last week, very few birds to photograph at this time of year but I took a few and a Grey Squirrel. Last week member Dave Mann showed us photographs from his visit to Beamish, it's a great day out and Dave went round most of it and showed us some photographs from the new 1950's town as well as the farm, pit village, town and trains. Thank you Dave, and Harry for helping out with refreshments. This week, Wednesday 4th February, Derek is running an editing night, he has sent us all information on what we could download, if you have a laptop remember to bring it along. Print of the year is fast approaching, if you are entering make sure you send Dave Turner a list of your entries with which subject they are in and bring your prints along this week. Regards Graham
Fed up with watching the rain coming down, I set out yesterday into the rain to Normanby Hall to try and get a photo for the “Water Project”, I have one potentially good image, but I always like to see if I can get something better. My OM Systems OM-1 camera, and 12-40mm Pro lens are weatherproof, but obviously I wasn’t, but really lovely to get out.
Last night Dave Mann gave an excellent talk on his visit to Beamish in May last year. Dave explored much more of the Beamish site than when I visited in April last year, Dave mentioned the difficulties of getting on some of the vintage transport around the site, I experienced the same during my visit. It's a fascinating historic working museum and well recommended for a visit. Many thanks Dave for an entertaining evening.
Good Morning All Last week at the club we had our yearly project night, last year it was one photograph a month with the same focal length, there is a full report on the evening on our blog page, but four members did last year's project with newer member Sam Collet showing photographs at the club for the first time, some excellent photographs taken in Japan. It would be good if a few more members took part this year, just one photograph a month with the subject being water. Attached is my January photograph from last year, it would work for this years project as well. This week, Wednesday 28th January, our catering manager Dave Mann will be having a week off and showing some of his photographs. His presentation will be a mixed bag of photographs. Don't forget to send Dave Turner an email with your titles for the print of the year. Entries will need bringing in on the 4th February. Regards Graham
We held our "Project Night" last night, the theme being "Prime Time", one photo each month taken over the previous 12 months, using the same focal length "prime" lens. Myself, Harry Kerman, Keith Rossington, and Graham Harrison, had each completed the project and were able to show their results as projected images at the meeting. The results of the project were very interesting, seeing how each photographer had approached the theme, and their interpretation of the project. I have posted here one image from each photographer. The evening was rounded off by one of our newer members, Sam Collett, displaying some of his images taken on a visit to Japan, his wildlife photography was stunning in detail, and quality, well done Sam.
Good morning All Last week at the club we held our monthly competition, a PDI, with the categories of "Insects" and "Open". There was a good level of entries and some excellent photography. The competition was judged by Colin Lusby of NELPS Photographic Society. The "Open" category was won by Dave Turner with an excellent landscape of Llanberis, and I managed a first place in the subject competition with a Willow Emerald Damselfly, still quite rare but I photographed this one at Bressingham Gardens Norfolk. The results and photographs are on are website under competitions. This week, Wednesday 21st January, is our project night, only four members took part, hopefully more will take part this year. The subject was "Prime Time", one photograph a month with the same focal length lens. To finish the evening, Paul Twomey is showing his mini lecture that he missed last time, and newer member Sam Collett is showing some of his work. The new project subject is Water, one photograph a month including water. There is plenty of water about at the moment, the rivers are flowing well for a start. Dave Turner will now accept your titles for Print of the year, the same subjects as the PDI of the year but with the addition of Best mono in competition as well. This is chosen by the judge from any mono print in the six subjects. Regards Graham
It was our first meeting after the Christmas break, it was good to be back and the meeting was well attended. We held a PDI competition with the categories of “Insects”, and “Open”, our judge for the evening was Colin Lusby, who is a very experienced judge, and he gave many useful tips, and suggestions on how to improve our images for greater impact. Dave Turner took the well deserved top spot, in the “Open” category with his image of “Moody Llanberis”, landscape photography doesn’t just need a good view, the skill is in capturing the mood, the light, and the shadows, as well as the scene – Dave has captured the scene perfectly, it’s a view that anyone would love to hang on their wall. In the “Insects” category, Graham Harrison took the top spot with his perfectly sharp Willow Emerald Damselfly, this is a beautiful green iridescent insect pictured on a stalk, an excellent capture. The Competition page on the our website has been updated with the top three images in each category, and the score sheets.
