A very common term for you to come across when researching for DSLR camera is “CROP FACATOR”

The topic is little complex and there are so many articles have been already written explaining crop factor – but I tried to make it more simple to learn.

In early 20th Century, around in 1909, 35mm film was become standard for the photography as well as for cinematography industry. Most of the film camera manufacturers started manufacturing new equipments/cameras based on 35mm standard which was the size of total film width. Later on, 35mm was become industry standard as “Full Frame” cameras as reference point among people in photography industry.

In comparison to the standard film size in a common film SLR camera which is 35mm, the image sensors used in latest DSLRs are generally smaller unless you explicitly buy a “DSLR with Full Frame Sensor of 35mm”.

We can also differentiate categories between Professional range cameras, that generally have Full Frame 35mm sensors and mid range/entry level cameras, which have smaller image sensors or cropped sensors.

If you take a picture with cropped sensor and the same lens, it will only produce narrow version of image as lens supplies the full latent image, but due to smaller image sensor, it cropped most of the image based on its size or cropped version. Different manufactures has different sizes of cropped version of image sensors and has different cropped factors as Nikon has crop factor of 1.5x where Canon produce cropped images of 1.6x crop factor. Means, if you attached a 50mm lens on Nikon cropped sensor, it will capture a image of focal length equal to 50 X 1.5 = 75mm and on Canon cropped sensor, 50mm will give focal length equal to 50 x 1.6 = 80mm.

In short, 100mm lens becomes 150mm lens on Nikon cameras and on Canon cameras, 100mm lens becomes 160mm.

On Micro FourThirds cameras, which has cropped factor of 2x, 50mm lens gives focal length equal to 100 mm, and 100mm lens gives 200mm effective focal length.

If you take a photo with a smaller sensor and the same lens it will only show a smaller area of the scene.

To understand all of this, take a look a given picture with different image sizes based on cropped factor on same focal length.


With reference from above picture, it is clear that large the image sensor, more the coverage of area you have on your camera.

Some photographers took it as a advantage that on cropped sensors, their lenses gives them more power to reach at object, but in reality, it is cropping the area and gives narrow version of image.

The 1x factor on the outer side of image is mostly used as industry standard of full frame also known as 35mm image sensor with dimensions of 36x24mm (typical).

The 1.3x factor used by Canon only on its 1D to 1D MK-IV series bodies. This size of sensor also known as APS-H size based camera bodies having sensor dimensions of 28.7×19.1mm.

The 1.5x factor used by most of camera manufactures on its cropped sensor bodies. This size of sensor also known as APS-C size based camera bodies having standard sensor dimensions of 24x16mm (typical), 2/3rd size of full frame sensors. Canon uses slightly short 1.6x cropped sensors on its cropped sensor bodies.

Micro Four Thirds. Since both Panasonic and Olympus support Micro Four Thirds. The sensor size is roughly half the area of a typical full-frame DSLR sensor. The aspect ratio of 4:3 (hence “Four Thirds” is similar to some types of medium format cameras. Four Thirds was designed from the ground up to be a purely digital standard. The typical standard size of sensor used by Micro Four Thirds is 17×13. Any lens of suppose 50mm becomes 100mm when used with Micro Four Third based camera. Most of the micro four thirds are mirrorless cameras, and use focusing method of contrast detection, similar to find in most of the point and shoot cameras.


When you enlarge images to the same size from different sensors the ones with the smaller sensors will be enlarged more – making it seem bigger.

As a result – when you fit a lens to a camera with a smaller sensor the lens is often said to have a larger equivalent lens size.

Differnet cropped factor

I’ve included a table below that shows the equivalent lens sizes for different crop factors. The column on th left is the lens focal length on a full frame camera.
Crucial Tips for Beginner Photographers

Beginner Photography Masterclass

1. Don’t go crazy buying the most expensive equipment right away.

It’s possible to get very nice photos with an inexpensive point and shoot. The more photos you take, the more you’ll know about what kind of camera to get when it’s time to upgrade.
2. Consider a tripod.

On the other hand, an inexpensive tripod is worth getting, especially if you have shaky hands like mine. When I got a tripod, my satisfaction with my shots skyrocketed.

3. Keep your camera with you all the time.

Photo ops often come when you least expect it. If you can keep your equipment relatively simple – just a small camera bag and a tripod – you might be able to take advantage of some of those unexpected opportunities. Or, if your phone has a camera, use it to take “notes” on scenes you’d like to return to with your regular camera.

4. Make a list of shots you’d like to get.

For those times you can’t carry your camera around, keep a small notebook to jot down places you’d like to come back and photograph. Make sure to note any important details, like the lighting, so you can come back at the same time of day or when the weather’s right.

5. Don’t overlook mundane subjects for photography.

You might not see anything interesting to photograph in your living room or your backyard, but try looking at familiar surroundings with fresh eyes. You might catch an interesting trick of the light or find some unexpected wildflowers in your yard. Often a simple subject makes the best shot.

6. Enjoy the learning process.

The best part of having a hobby like photography is never running out of things to learn. Inspiration is all around you. Look at everything with the eyes of a photographer and you’ll see opportunities you never noticed before.

7. Take advantage of free resources to learn.

Browse through Flickr or websites like the IRIS Academy of Photography Forum for inspiration and tips. Also, your local library probably has a wealth of books on all types of photography. If you’re interested in learning about post-processing, give free software like the GIMP a try.

8. Experiment with your camera’s settings.

Your point and shoot may be more flexible and powerful than you know. Read the manual for help deciphering all those little symbols. As you explore, try shooting your subjects with multiple settings to learn what effects you like. When you’re looking at your photos on a computer, you can check the EXIF data (usually in the file’s properties) to recall the settings you used.

9. Learn the basic rules.

The amount of information about photography online can be overwhelming. Start with a few articles on composition. Be open to what more experienced photographers have to say about technique. You have to know the rules before you can break them.

10. Take photos regularly.

Try to photograph something every day. If you can’t do that, make sure you take time to practice regularly, so you don’t forget what you’ve learned.

11. Don’t be afraid to experiment.

If you’re using a digital camera, the cost of errors is free. Go crazy – you might end up with something you like. You’ll certainly learn a lot in the process.

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