Questions tagged [magnification]

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What C adapter do I need for a 1x and 3x view microscope?

I am an archaeologist and my work supervisor just provided to me a binocular microscope with 1x and 3x magnifications along with a AmScope MD35 camera to take photos of the items that I am viewing ...
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3 votes
2 answers
170 views

Would an MFT to EF speedbooster on an MFT camera help me photograph and record backyard wildlife?

Upon learning that an Olympus 12-200mm with a 16.6x zoom will not be produce an equivalent or better zoom range as a Canon 70-300mm (see my previous question), I now pose the question: Would it make ...
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2 votes
5 answers
711 views

Magnification percentage meaning

How do I convert from the percent magnification that many photo editing apps use to times magnification? For example, if I have taken a photo at 30mm and then zoom to 100% percent in Lightroom, what ...
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1 vote
6 answers
246 views

Does higher MP magnify the subject?

Sorry for a simple (or even wrong) question as I am new in this area. Given the same setting, same distance, does a higher MP camera magnify the subject or its the same? If it magnify the subject, how ...
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3 votes
5 answers
427 views

Options to increase magnification when the minimum working distance is fixed

I work in a lab which deals with a significant amount of scientific photography. My current situation calls for an increase in magnification, however, there is a physical limit to how close the lens ...
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2 answers
120 views

MFD equals 4x focal length? But published specs contradict that

I spent the better part of this evening perusing the series of equations behind this popular magnification calculator. Equation F10 states d ≥ 4f, where d is focus distance and f is focal length. I ...
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8 votes
1 answer
1k views

How to estimate pixels per degree for an image from a camera phone using EXIF data?

This is my first time to look at metadata and I'm confused by the focal length stated in this file that a friend e-mailed to me. It was taken with a cell phone. I'm trying to roughly estimate the ...
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2 votes
2 answers
143 views

How to take macro shots with extreme magnification?

My current setup for macro shots is a 85mm prime on a fullframe body with 3 extension tubes (about 70mm in total). I do get pretty close but I saw some images of insects that have an EXTREME ...
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1 answer
324 views

What kind of bellows should I use for 5x magnification with a 100mm lens?

I have a Canon 1200D and I have a Tokina f2.8 100mm macro lens. I would like to achieve up to 5x magnification. Which bellows should I use?
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3 votes
2 answers
1k views

Does changing the focal length change the depth of field for the same magnification?

When taking pictures with lenses with the same f-stop and different focal lengths, and magnifying the same subject to the same size (by changing the distance), how does the depth of field vary? I am ...
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8 votes
2 answers
6k views

How to zoom with Canon 77D with Canon 50mm 1.4 lens?

I've just bought this camera and the lens, and I feel so silly; I don't know how to zoom. Do you know how? When I turn it on it seems to be zoomed and I would like to zoom out.
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1 vote
2 answers
208 views

What are the ways to improve magnification in the reversed lens configuration?

There is a really detailed discussion on achieving microscope-magnification using a small focal length lens in reversed configuration. How to make a microscope with a DSLR camera? I wish to know ...
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7 votes
5 answers
2k views

Why doesn't the focus distance at which my lens has magnification 1 match the formula?

From the Magnification Wikipedia page, I have the following equality: M = di/do = f/(do – f) = (di – f)/f with M the magnification, f the focal length, do the distance from the subject to the lens,...
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3 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 ...
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3 votes
5 answers
829 views

Can viewfinder type make an appreciable difference in manual focus?

I have a few old vintage lenses that I love to shoot with on my Canon T3. The obvious disadvantage is the challenge of getting sharply focuses images while focusing manually. I have great vision, but ...
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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 ...
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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, ...
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3 votes
1 answer
1k views

How does a teleconvertor affect magnification ratio?

Here is my base: camera, lens with particular magnification ratio and teleconverter. I would like to understand if the magnification ratio will change if I use the teleconverter, compared to the ...
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1 vote
2 answers
1k views

How can I estimate the magnification factor for a camera?

I am trying to estimate the magnification factor of a camera for research purposes and I am running into a few issues. It would be great if someone could help me understand what's going on here. I ...
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2 votes
3 answers
1k views

Macro with crop body

Let suppose I have full-frame body and macro lens with magnification 1:1. And I switch to crop body with the same lens. My understanding is because the projection of the lens will be the same, but ...
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2 votes
2 answers
4k views

How do focal length, minimum focus distance, and magnification interact on a lens?

I have a question about zoom lenses that I can't find the answer. It's about these 3 concepts: Maximum Magnification (MM) Minimum Focusing Distance (MFD) Longest Focal Length (let's say LFL :) ) On ...
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1 vote
2 answers
1k views

Modify webcam optics increasing magnification

Currently using a throwaway webcam to view backyard bird activity connected to a Raspberry PI3 using MotionEyeOS. The RPI3 is outside, as is the camera. Question is... Is there a simple/cheap means ...
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3 answers
1k views

Difference between focal point and distance away from object? [duplicate]

I have a macro lens for the camera on my phone. I want to calculate the magnification of the lens because the one i purchased does not state it. I've found this guide which states the mathematical ...
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1 vote
1 answer
99 views

Proper method to measure the magnification of a reversed lens [duplicate]

I have a 50mm prime lens and a 18-55mm standard lens at my disposal. How do I measure the magnification of a reversed lens when used with a reverse mount. What are the factors that come into play to ...
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1 vote
1 answer
547 views

Is the relationship between object distance and magnification highly dependent on the camera used?

I'm using a cell phone to capture an image of two objects (O1 and O2) on a flat plane and my camera is level with respect to this plane (the phone and the plane are both parallel). One of these ...
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4 votes
2 answers
1k views

50mm and 100mm macro lenses difference at the minimum focus distance?

So I bought a Kiron 105mm f2.8 1:1 lens recently to be used with my Sony a6000. I know that the difference between a 50mm macro and a 100mm macro is how close you can get to your subject, that is with ...
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2 votes
3 answers
285 views

If the zoom number doesn't tell me magnification, what does? [duplicate]

I've read How do I convert lens focal length (mm) to x-times optical zoom?, and learned that the times-zoom number doesn't tell you much. So, how do you determine the magnification — the amount a lens ...
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2 votes
2 answers
826 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 ...
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15 votes
3 answers
22k views

How do zoom, magnification, and focal length relate?

Zoom lenses and cameras with superzooms are often sold with a times ("×") zoom number — like a 12x zoom or 30x zoom. The question How do I convert lens focal length (mm) to x-times optical zoom? ...
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2 votes
1 answer
462 views

Can I make a 1:2 macro lens into 1:1 true macro using only bellows?

I have a Tamron 90mm with a 1:2 magnification. If I use a bellows will that make it 1:1? I know I can buy an extension but I also what to know if I can get 1:1 magnification with only the bellows ...
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2 votes
1 answer
1k views

How to find numerical aperture of lens

I need to find the precise collection cone angle of an arbitrary objective at an arbitrary (but known and finite) object-side focal length. This is typically given as the "numerical aperture", defined ...
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1 vote
1 answer
7k views

How do I set the manual focus magnification on the Sony NEX-5R?

The NEX-5R has a manual assist function: if you enable it, and put the camera in manual focus mode, then when you rotate the focus ring, the camera shows a magnified view so that you can focus better. ...
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3 votes
5 answers
19k views

Is the formula for object image size given focal length, etc. independent of sensor size?

I am trying to figure out how big an object of, say, 50cm height at 100m distance and 600mm focal length would appear on a camera's sensor. The ubiquitous formula object size in image = focal length *...
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0 votes
1 answer
486 views

What focal length and quality of lens do I need to read 15cm high text at 500m away? [duplicate]

I have to photograph 15cm high printed text from 500 meters away. The text has to be human readable in the result. What kind of focal length do I need? Can i compromise, and get a camera with less ...
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5 votes
1 answer
2k views

What is Effective Aperture?

What is Effective Aperture? And how it can affect my exposure? Also how does it relate to magnification? A question that talks about effective aperture but without details
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0 votes
1 answer
466 views

Compare magnification of point and shoot cameras with dSLR telephoto lenses [duplicate]

I just want to know how much magnification there is... if I have a point and shoot camera and it has 10X zoom, I'm seeing that the subject is "brought" 10x closer. So, what does a dSLR telephoto lens ...
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-1 votes
1 answer
5k views

How to calculate the magnification factor of an object to its image?

I have an object of size 37.5um x 37.5um, and captured a 640 x 480 resolution image of the object with a CMOS sensor. I see that the object is around 200 x 200 pixels in the image. How do I calculate ...
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2 votes
1 answer
375 views

What's the magnification of a full frame macro lens on a MFT camera?

I think I've got this right but I would like to be positive before I buy a lens. If I were to use a Nikkor 55mm full frame macro lens with a 1:2 magnification and a 9inch min focus on a micro four ...
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3 votes
1 answer
252 views

Can I make my Canon dslr instantly zoom to 1:1 after shooting a picture?

When you shoot a photo, your picture is displayed onscreen. It's said to be possible to zoom in the picture, but pressing the zoom buttons do not zoom but activate their second function. So is it ...
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3 votes
5 answers
2k views

Can we combine extension tubes and diopters for greater macro magnification?

I want to increase the magnification of my Canon 100mm L Macro. I already have a set of kenko extension tubes. Could I buy a dipter to even increase further the magnification? For example Raynox ...
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11 votes
1 answer
691 views

What is the significance of the typical extension tube lengths?

I've been recently looking into getting an extension tube set for some macro photograpy. I've noticed that a lot of these 3 tube sets (for Canon EOS) have the same, very specific lengths: 13mm, 21mm, ...
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10 votes
3 answers
3k views

How Much Can Lens Magnification Be Improved Without Significantly Lowering Image Quality?

Currently I own only a 1X magnification macro lens (35mm F/2.8) but I am playing with a rented Canon MP-E 65mm lens which can go to 5X. The photography at that magnification is a world apart! The ...
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4 votes
1 answer
2k views

Does maximum aperture change with focus distance with the Canon 60mm f/2.8 macro lens?

This site says The Canon EF-S 60mm f/2.8 Macro USM Lens loses 1/2 stop at 1:5, 1 stop at 1:3, 1.5 stops at 1:1.5 and 2 stops at 1:1 (lifesize). Can anyone confirm that at 1:5 magnification, the ...
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6 votes
2 answers
6k views

How can I calculate magnification ratio I get by reversing a lens?

I am looking for a way to mathematically determine the maximum magnification ratio that is possible/practical to achieve by reverse mounting a non-macro lens, prior to purchasing the lens. See ...
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6 votes
1 answer
850 views

How To Measure Viewfinder Magnification?

What is the easiest way to measure the magnification of a viewfinder? Must be able to do it for both electronic (EVF) and optical viewfinders. Also, I only have access to one focal-length.
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5 votes
2 answers
3k views

How can I estimate the reproduction ratio of an unknown macro setup?

If I have a macro setup consisting of more than a normal 1:1 lens (tubes, reversal, or anything else), how can I measure the reproduction ratio (2:1, 1:1, 1:2, 3:1, etc.)? What process can I follow ...
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4 votes
1 answer
799 views

Do you suggest using an extender/tele converter with a Macro lens such as Canon 100mm f2.8 macro lens?

Do you suggest using a teleconverter with a dedicated macro lens? I have tried out using a Kenko TC with canon macro lens - however I am not 100% satisfied with the "extra" magnification that I got on ...
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39 votes
7 answers
21k views

Does my crop sensor camera actually turn my lenses into a longer focal length?

So, I mount a 200mm lens on my Canon 450D. It effectively becomes a 320mm lens. Is this the equivalent of 320mm on a full frame camera? That is, from what I've figured out I get an equivalent field of ...
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33 votes
5 answers
33k views

How can I calculate what the effect of an extension tube will be?

There must be a mathematical description of the difference that an extension tube makes to a lens -- is it something that can be easily described? (For example, with teleconverters you can say things ...
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