43
votes
Accepted
Is there a difference between taking a far shot on a 50mm lens and a close shot on a 35mm lens?
If you shoot from the same position with both lenses, then taking the 35mm lens and cropping it to the same angle of view of the 50mm lens will give you pretty much the same picture, other than the ...
- 173k
22
votes
Is there a difference between taking a far shot on a 50mm lens and a close shot on a 35mm lens?
The proof is in the pudding – the focal lengths are not exactly the same as yours, but the differences are obvious...
- 843
15
votes
Is there a difference between taking a far shot on a 50mm lens and a close shot on a 35mm lens?
Thanks to my schwifty skills in Inkscape, the rotation here is slightly off but the following shows exactly what you're comparing. These are the fields of view of a Nikon 35mm (inner) and a Nikon 50mm ...
- 1,442
13
votes
Why is distance absent from the exposure triangle?
You do get less light as you move further from a object. However, that less light is focused on a smaller area. It so happens that the two effects cancel out, and the focused image of a object will ...
- 17.3k
12
votes
Accepted
Why doesn't the focus distance at which my lens has magnification 1 match the formula?
The equation assumes a simple single element lens that is bilaterally symmetrical. The camera lens, to mitigate the 7 major aberrations (shortcomings that degrade) is constructed using several ...
- 37.7k
9
votes
Why do you need to change your position rather than just focal length to affect perspective?
Perspective is the size relationship of objects. You might say the ratio of size of foreground objects to background objects. Perspective plays a big part when it comes to judging distances to objects....
- 37.7k
9
votes
Why doesn't the focus distance at which my lens has magnification 1 match the formula?
first of all, kudos on your effort to break a photography problem down to first principles.
The discrepancy you've observed stems from a common oversimplification. Your 100mm Lens is actually what ...
- 1,989
8
votes
Backyard wildlife zoom question factoring distance
Given the ratio of the Canon APS-C crop factor (1.6) to the MFT (2.0) sensors, the equivalent of a 300mm on your camera is 300*1.6/2=240mm so a bit longer than your intended lens (200mm).
The zoom ...
- 18.3k
8
votes
Accepted
Backyard wildlife zoom question factoring distance
Assuming all other things are equal:
Your Canon 80D has a crop factor of 1.6. This means that your 300mm lens has an effective focal length of 300mm × 1.6 = 480mm.
A micro-4/3s camera has a crop ...
- 20.5k
6
votes
What is 'sensor height?'
Sensor height is indeed the physical measurement of the vertical dimension of the sensor's active pixel area.
From Wikipedia's Image sensor format article, the phone's sensor format of 1/3" (actually ...
- 31.6k
5
votes
What lens will let me take a photo of a bird high up in a tree?
What lens would work for a canon 6D to take up close photos of birds far away in the trees?
It comes down to three questions:
How up close do you want to get?
How far away are the trees?
How big are ...
- 31.6k
5
votes
Accepted
Does aperture really matter if the subject distance is large?
That observation is true.
The nearer to the lens, the smaller the depth of field.
If you use an online DoF calculator like e.g. https://www.dofmaster.com/dofjs.html you can easily see this.
...
- 3,778
5
votes
Subjects not focused when they are too far away
I'm not really seeing that any distance is softer than another.
Using screenshots at 100% zoom, I've focussed in on one significant area of each.
From this distance, they each look as soft as the ...
- 21.6k
4
votes
Accepted
Is it possible to calculate the distance to an object using two pictures taken a few cm apart?
Is it possible to calculate the distance of an object to the camera with two pictures which are taken a few cm apart?
It depends. You'd need to know something more than just having the two photos. ...
- 31.6k
4
votes
Is there a difference between taking a far shot on a 50mm lens and a close shot on a 35mm lens?
Do you have a selection of lenses (or a zoom lens) now?
Shoot a table-top test with different focal lengths, repositining the camera to get tye same view of the foreground object. Then look ...
- 4,362
4
votes
How do I calculate the distance of an object in a photo?
I know it's an old thread, but this question seems to come up now and then. FWIW, I added a calculator to compute an object distance in an image.
http://www.scantips.com/lights/subjectdistance.html
...
- 12.8k
4
votes
Why is distance absent from the exposure triangle?
The exposure is based on the amount of light hitting the subject intertwined with how much light is reflected from the subject. Thus the exposure remains a constant regardless of camera to subject ...
- 37.7k
4
votes
Why is distance absent from the exposure triangle?
The inverse square law applies to the distance between the light source and the subject. It doesn't apply to the distance between the subject reflecting the light and the camera in the same way.
This ...
- 173k
4
votes
What is 'sensor height?'
I find that the diagonal measure of this sensor image is 5.867mm. From specification I can't find, the height and length. However, based on the height to length ratio 1920 pixel length by 1080 high I ...
- 37.7k
4
votes
Backyard wildlife zoom question factoring distance
The formula for determining the focal length required to fill the frame with a subject is pretty simple:
FL= sensor(distance/size)
So for your example, to fill the width of an m4/3 sensor (18mm), ...
- 12.2k
4
votes
Accepted
Is x50 zoom camera able to zoom 500 meter target area from a 6 km distance?
By calculation angle (which is to the camera) of this triangle is around 4.7 degree.
So on one of the length of zoom you will be able to fill the frame with this object.
But the quality on such ...
- 10.2k
3
votes
DOF change when keeping subject size same in the frame
Longer focal length lenses have shallower depth of field (DoF) than shorter focal length lenses if both are set to the same f-number when both are used at the same subject distance.
On the other ...
- 173k
3
votes
Calculation for getting dimension of object in image not working
You are missing something big. The size of the camera sensor is not mentioned. You need to know it, both in mm and in pixels. You didn't say any sizes, but Samsung says 3.7 megapixels, so if 4:3, ...
- 12.8k
3
votes
What kind of lens to use to get sharp images of people from a distance?
There could be any number of factors coming into play here. Lack of sharpness is many times due to how you captured the image and not what lens you are using. It is not impossible for the lens to be ...
- 46.4k
3
votes
Why do you need to change your position rather than just focal length to affect perspective?
To quote Ansel Adams The Camera:
"...moving closer to the subject causes nearby objects to grow in apparent size more rapidly than distant ones, so their relative sizes change. In contrast, changing ...
- 223
3
votes
Physical Distances at the edge of a photo compared to the center
Yes, if you ignore barrel/pincushion distortion.
Distortion aside, a camera projection obeys the pin hole camera model. Under this model straight lines in the scene are always rendered as straight ...
- 118k
3
votes
Simulating increasing image distance
Short answer: you can't do it with just one image.
Long[er] answer: to realistically simulate distance change, you need either multiple images taken from multiple different subject distances or to ...
- 2,034
3
votes
Accepted
How to find an angle and a distance for clicking picture of a distorted artwork to achieve 3D effect?
As this is the photography forum I will try to make a good approach using one. You need a camera with some kind of live view preferable.
Get a tripod and position your camera pointing to the sheet of ...
- 22.1k
3
votes
Distance from camera to have the photo print out as it's actual size
I am trying to fix my vinyl floor...
Sounds like it would not ruin the aesthetics of your photos if you laid a ruler on the floor, and included it in the frame when you took the picture.
My own next ...
- 636
2
votes
How can I determine the distance to a subject in a old photo with little other information?
You're missing a key piece of information that is necessary in order to determine the distance and that either is the distance from the camera to the first runner or the focal length of the lens.
...
- 118k
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