OT: Smartphone Telephoto Lenses

Godfrey DiGiorgi godfreydigiorgi at me.com
Fri Oct 9 18:16:01 EDT 2020

The standard 1x for most smartphone cameras is equivalent to about a 28mm focal length on 35mm FF, albeit the typical smartphone aspect ratio is 3:4 native, not 2:3. By comparison, 50mm (on 35mm FF) is a pretty long lens, about a 2x magnification factor (not counting digital zoom). 

If you want something longer, the Moment case and auxiliary lenses provide a 58mm equivalent, which when fitted to the iPhone 11 Pro's 2x camera nets a FoV of about 105mm (on 35mm FF). It's an excellent quality auxiliary lens and nets very good results, particularly if you use some kind of a support to keep the iPhone absolutely steady when making an exposure. And with the Moment camera app, you have excellent exposure control and raw output to work with. 

I have both the Moment 18mm wide and 58mm telephoto auxiliary lenses. With them, and the Moment camera app, the iPhone 11 Pro becomes something more than just a smartphone camera. Used to best advantage, one can be hard pressed to see the difference between what the result look like compared to at least an APS-C and even a few FF cameras. 

Of course, there are many constraints ... smartphone cameras have teensy sensors so net their best picture quality at the lowest ISO settings, etc. 

No matter where you go, there you are.

> On Oct 6, 2020, at 11:39 AM, Paul Stenquist <pnstenquist at comcast.net <mailto:pnstenquist at comcast.net>> wrote:
> I was surprised to learn that the “telephoto” lens on the best Apple and Samsung phones yields only the fov of a 50 mm lens on 35 mm full frame. Not exactly a big glass look and hardly deserving of the telephoto moniker.

More information about the PDML mailing list