Linked Questions

4 votes
1 answer
3k views

30x Optical Zoom vs. 30x Magnification on Binoculars? [duplicate]

I just recently learned that 30x Optical Zoom on a Camera and 30x Magnification on Binoculars are different things. Suppose if I have got 30x50 Binoculars, then what would be its equivalent number of ...
cpx's user avatar
  • 179
0 votes
0 answers
73 views

Why binoculars have magnification number, but lenses don't [duplicate]

I got into birding recently and got a pair of 10x42 binoculars and got a camera with a crop ratio of 1.6 and a 100-400mm (focal length) lens. With binoculars and spotting scopes everything seems easy -...
eddyP23's user avatar
  • 101
88 votes
6 answers
46k views

What is "angle of view" in photography?

I read on the Lens Buying Guide @ neocamera: Focal-length determines the angle-of-view seen through a lens for a given sensor-size. With a full-frame sensor a lens gives the same angle-of-view ...
kacalapy's user avatar
  • 7,908
82 votes
6 answers
511k views

How do I convert lens focal length (mm) to x-times optical zoom?

What is the rule to convert the 'mm' notation to the 'optical zoom' notation? I searched a bit and found this one: $$\text{Optical zoom} = \frac{\text{Maximum focal length}}{\text{Minimum focal length}...
dialex's user avatar
  • 2,226
3 votes
7 answers
4k views

What focal length of glasses is best for photography?

Eyeglasses have different potential focal lengths. For example, there are reading glasses, computer glasses, driving glasses etc. So, if I am shooting photos, what is the right focal length? The ...
Clickety Ricket's user avatar
13 votes
4 answers
5k views

How do manufacturers get to high (83x) zoom levels on hybrid cameras?

Obviously the biggest hybrid zoom on the market (Nikon Coolpix P900 I think) does not range from actual 24 mm to 2 meters in physical length, but what kind of optical systems do manufacturers use to ...
Chimel31's user avatar
  • 131
13 votes
4 answers
646 views

What is it called when an object appears to be the same size with the eye and through the camera viewfinder?

I have a Canon 18-135 lens. I am looking into the camera viewfinder with my right eye and not through the viewfinder with my left. I start from 18mm and keep zooming in till I see a particular object ...
Lazer's user avatar
  • 4,049
19 votes
1 answer
16k views

What does "viewfinder magnification" mean?

Viewfinders (both optical and electronic) typically come with two stats: magnification and coverage. The latter measuring how much of the actual exposed area (film or sensor) one sees. But what is ...
subsub's user avatar
  • 965
6 votes
5 answers
2k views

Can you determine if focus is sharp without diopter adjustment if your sight is imperfect?

I've already encountered this question about wearing glasses as a photographer. A more specific question I have is as follows. If your eyesight is not perfect, or your glasses and/or contact lenses ...
G_H's user avatar
  • 911
1 vote
4 answers
329 views

Basic exercises to try with a DSLR Camera to improve shots otherwise taken on an iPhone

I have a Nikon D7000 with a 50mm Nikkor prime lens. I would like to try some exercises to try and capture images of e.g. architecture in soft light, or in cities in the morning etc, that are much ...
apg's user avatar
  • 113
5 votes
2 answers
2k views

Which lens focal length to match binoculars' magnification: An alternative approach

The question of how lens focal length and binocular magnification appears to have been asked over 3.86 quinzillion times. Regardless, it's still hard to get an answer the layman can understand. I'd ...
tkp's user avatar
  • 155
2 votes
2 answers
864 views

Panasonic Lumix FZ1000 - How does it compare to binocular magnification?

I know almost nothing about photography. But I am interested in learning. My dad just purchased a Panasonic Lumix FZ1000. I own a pair of Leica 10x50 binoculars. I asked him how the maximum zoom or ...
Randy Minder's user avatar
1 vote
3 answers
1k views

What is the (real) meaning of binocular magnification number?

This is more of an optics measurements question than a photography question, so if you don't want it on the site, just delete it. I just couldn't think of a better match. Do binoculars, loupes, ...
John Robertson's user avatar
1 vote
3 answers
759 views

What is the "crop factor?" [duplicate]

I need some help understanding crop factor. I do get that the actual focal length doesn't change, but as far as field of view and how the image turns out is where I'm getting stuck. Anything that I've ...
Dani's user avatar
  • 85
1 vote
2 answers
215 views

Zoom lenses for wildlife at 600 meters

I spend alot of time driving back roads for work I just got a rebel 7 and I'm trying to find a lense for taking picture of bears and other animals from about 600 meters and have a fairly close up ...
kevin simlik's user avatar

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