You are here:

Digital Photography/DX lens on a DX body


Hi! If I have a Nikon D3300 (DX format camera) with a 18-55 mm kit lens (DX lens), do the crop factor (1,5x) apply here? I mean I know that, if I would use a FX lens on my camera the crop factor would apply, but since I've got a DX lens does it mean I get the same focal length as it's written on the lens? Or the crop factor apply to the DX lens to? (Sorry for overcomplicating the question)"

Hey David

Let's make it as simple as possible to avoid any confusion.

Focal lengths mentioned on all the lenses (DX & FX) are measured on a Full Frame Sensor, since crop Sensor DSLRs (or Amateur DSLRs) are a recent development and all the DSLRs were Full frame to begin with. With the advent of new crop sensor DSLRs, new lenses were introduced, specifically for them. So an 18-55 mm lens is equal to a 27-83 mm on a full frame. This is why you'll see most of the normal Full frame lenses like 28-70, 28-300, 24-70 etc.

Technically you could mount an FX lens on an DX Format DSLR, but it will be cropped by 1.5 times, which means a 24-70 lens would become 36-105, thus not remain wide enough for a DX format camera.

Using a zoom lens would extend your range, as a 70-300 lens would become 105-450 on a DX format body. Similarly, a 50 mm fixed focal length lens becomes 75 mm on a DX format body. You also have to multiply the 'f' number by the crop factor, factoring the reduced size of sensor. For example a 50 mm f/1.8 lens would effectively become a 75 mm f/2.25 on a DX format DSLR.

So you can use FX lenses on your DX body. Just remember to accommodate the 1.5x Crop factor (for both the focal length & 'f' number)and evaluate accordingly. Hope this answers your query.



Digital Photography

All Answers

Answers by Expert:

Ask Experts


Vipin Joshi


I can answer all questions related to buying/choosing a Digital Camera, SLR Camera, Lenses etc. I will help you choose the best product with a holistic approach, keeping in mind your requirement and budget.


I own 4 Retail showrooms in NOIDA & Delhi, where we deal in Smart Phones, Digital Cameras, D-SLRs & accessories. We have been in the business for over 16 years now. I have gained my knowledge over a period of time by using and comparing the Cameras first hand and understanding the intricacies involved by testing them myself. I have been conducting personal training sessions for my DSLR customers and otherwise, at a cost. I have written an article in the newspaper on 'How to buy a Digital Camera' ( have been interviewed on a news channel (

JOSHI SONS 232, IInd Floor, The Great India Place, Sector-38-A, NOIDA Ph: 0120 4312711, 09811900477 F-8, Ist Floor, Savitri Market, Sector-18, NOIDA Ph: 0120 4312700, 09811900400 G-32, Savitri Market, Sector-18, NOIDA Ph: 0120 4312700, 09811520880 183, New Lajpat Rai Market, Delhi-110006 Ph: 011 23269866, 9811900477

Dainik Jagran, City Plus (October 15 - October 21, 2011). Posted on Video of my GIP showroom coverage with my expert comments on How to choose the right camera (

I completed my schooling from Delhi Public School (NOIDA), Bachelor of Commerce (Honours) from Delhi University and PGDBA (MBA) from Symbiosis, Pune.

Awards and Honors
Canon Privileged Partner SONY Alpha Flagship Store Exclusive Nikon Showroom Nikon DSLR Zone Olympus Zone Fujifilm Priority Partner

Past/Present Clients
NTPC, ONGC, Indian Oil Corporation, Meinhardt Singapore Pte Ltd, Indian Army, Precision Pipes (PPAP), Russian Embassy, NDTV, Zee News, HCL,, Technip, NDTV, AAj Tak and several others.

©2017 All rights reserved.