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Are you “zooming in” all wrong with your smartphone?

February 27, 2021 by Linda Holt 10 Comments

If you have upgraded to new smartphone within the past few years then chances are, you have more than one lens on your camera. Depending on which model phone you own you will have the ability to zoom in either 2x or more. So, my question is, are you “zooming in” all wrong? There are two ways to “zoom in”, so let me explain the difference between optical vs. digital zoom.

Optical zoom

Below is the iphone 12 pro max. You can see it has three separate lens. A wide angle lens, a normal lens and a telephoto lens.

iphone 12 pro max

Below is a photo of pencils on my desk. You can see I have the camera set to the normal 1x lens.

optical vs digital zoom

Switching over to using the 2.5x telephoto I am able to get in closer without physically moving in closer. This called optical zoom. I am not compromising the quality of the image by switching to the 2.5x optical lens.

optical zoom on the iphone 12 pro max

Here’s where it gets confusing. On both the iphone and the Android you have the option of tapping on any of the lenses and either a slider or a wheel will appear, allowing you to zoom in way more. This is called digital zoom.

Digital zoom

 Digital zoom uses magnification technology to enlarge an area of an image, thereby compromising the integrity of the picture by cutting down on the megapixels.

digital  zoom on the iphone

The iphone 12 pro max allows you to digitally zoom in by a factor of 12x. There are several problems when you do this. First of all, you are not really zooming in, but simply magnifying the image while at the same time, degrading the image by blowing up the pixels.

Second, it’s very challenging to get a sharp image when you are “zooming in” this much if you are hand holding the phone. You’re going to want to use a tripod it you will be using the12x zoom. I was trying my hardest to hold my camera still when taking this image at only 5.6x but look how blurry the pencils are. Had I put my camera on a tripod, the result would have been a much sharper image.

My new Samsung also has three lenses. A wide angle lens, a normal lens and a 3x optical zoom lens. I absolutely love the 3x lens. When I want to zoom in it allows me to get even closer than the iphone 2.5x optical lens.

Samsung 30x digital zoom

If you look along the bottom border, the Samsung has the option of a 30x digital zoom! I will tell you right now, you absolutely need a tripod to get a sharp image at 30x unless you have a freakishly steady hand.

Samsung 20s 30x digital zoom
Samsung 30x digital zoom

This image above was holding the phone about as steady as I could get. I had tried the 30x outside though and it was impossible to get anything decent without a tripod.

Another way people use digital zoom is by pinching out with their fingers and enlarging the image. This will produce the same result as the in-camera digital zoom. Again, it is simply magnifying the image, blowing up the pixels and sacrificing quality.

optical vs. digital zoom
NEVER ZOOM WITH YOUR FINGERS

So in summary, Optical zoom is using one of the cameras designated optical lens. There will be no sacrificing of image quality. Digital zoom is magnifying the photo, cutting down the megapixels while sacrificing quality. Both optical zoom and digital zoom have their uses but optical zoom will result in a much sharper image than digital zoom.

One of the disadvantages of the smartphone vs a DSLR camera has always been the fact that you can’t change lens and zoom in. Now, with the option of optical zoom the smartphone is one step closer to rivaling the DSLR.

One situation where I often want to zoom in is when shooting landscapes. Now both my iphone and Samsung allow me that option. If you enjoy shooting landscapes too, you may want to check out this post on seven tips for taking better landscape photos.

Hopefully that clears up any confusion and explains the difference between optical vs. digital zoom.

Now for my BIG NEWS!!! My new Android class for interior designers is here. I have also updated the existing iphone class and added an editing class.

If you are a designer, stager or other home professional looking to improve your smartphone images then this class was created just for you!

Smartphone photography for interior designers

To save this post for later, the difference between optical vs digital zoom, click on the image below.

Interior Designers! Be sure to download my free guide Five smartphone photography tips to achieve magazine worthy interior photos

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Filed Under: iphone photography, Photography, Uncategorized Tagged With: iphone photography, photography, photography tips, smartphone photography

Reader Interactions

Comments

  1. Leslie Carothers says

    February 27, 2021 at 6:41 am

    What a useful explanation, Linda. Thank you! I have been using the digital magnification for my landscape photos, not the optical zoom, and I can see that the quality DOES degrade.

    As always, you are the best in providing us all with free intell to help us.. I can only imagine how much everyone that takes your new classes will benefit..especially when we can get back to tradeshows!

    Reply
    • Linda Holt says

      February 27, 2021 at 6:57 am

      Thank you Leslie. When possible, always use the optical zoom first, digital zoom second.

      Reply
  2. Janet R Lorusso says

    February 27, 2021 at 12:47 pm

    Great post, as always, Linda! I suspected this as I’m always trying to zoom in, with spotty results, but my iphone is old enough to not have so many options…getting close to time for an upgrade and now I know why all those lenses are important and what to do with them!

    Reply
  3. LINDA MERRILL says

    February 27, 2021 at 1:27 pm

    It’s amazing the technology we hold in our hands. Thanks for tech talk on lenses!

    Reply
  4. Anne says

    February 27, 2021 at 1:37 pm

    Another terrific tutorial! Your explanations are always so clear – thanks for that. Now I’m looking at my iPhone XR and saying “why can’t you do that?”

    Reply
  5. Mary Ann Benoit says

    February 28, 2021 at 1:43 am

    What great information!! Wonderful explanations and examples.

    Reply
  6. Lisa A Peck says

    February 28, 2021 at 8:59 am

    Thanks for sharing these technical tips! I use the digital zoom too often and get frustrated by the results and now I know why!

    Reply
  7. Carole says

    February 28, 2021 at 5:03 pm

    So useful – I never understand the capability of my iPhone and know I am doing it wrong (ie finger zooming!). Thank you for the clear explanation.

    Reply
  8. Amie Druehl says

    March 2, 2021 at 10:14 am

    What?! This was so helpful. Thank you for taking the time to explain this so clearly. I just got a new iPhone and I’m going to go play with it right now to make sure I’m using it correctly.

    Reply
  9. Judith Taylor says

    March 6, 2021 at 10:38 am

    Wonderful clear detailed explanation I can actually follow. Thank you so much, and congratulations on the launch of your course for androids. btw how DO you juggle so many phones?

    Reply

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