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8
votes
3answers
1k views

What is the formula for percent of frame filled at a specific distance and focal length?

I am thinking about buying a new lens specifically to take photos of distant targets (birds, bears, etc). I currently own the Canon 70-300 IS USM, which is a nice lens, but I find that if I want to ...
7
votes
4answers
3k views

How can I tell if a photo is real or faked?

How can I tell if a photo has been edited or manipulated? Are there techniques for distinguishing real photos from fakes? Are there software tools that can help? Are there things I can do in ...
6
votes
7answers
6k views

How can I visualize or simulate the effect of different focal lengths?

I have seen many camera review sites illustrate the effect of using different focal lengths on the same photograph using frames. There are also similar illustrations to compare different sensors (full ...
32
votes
3answers
246k views

What does STM mean on a Canon lens?

The Canon EF 40mm f/2.8 has a designation of STM on the lens. What does this mean? What are the advantages of having it and does it replace an older technology? We have a terminology thread that ...
8
votes
9answers
2k views

How do I choose a point and shoot camera under $400?

I need a P&S camera for my family. They would probably use it for family functions,trips etc. I want a camera with flash for taking good night photos with a decent quality. They are not ...
8
votes
2answers
3k views

How can a prime lens focus on more than one plane?

By definition, a prime lens is a fixed lens system with a fixed focal length. Then, simple physics tells us that it should be able to focus only on one plane (at a fixed distance) in front of it. But ...
3
votes
4answers
1k views

How do I make the water silky in water/beach photography?

I see beautiful photos of beaches or rivers/streams where the water looks like frosted glass... How is this effect achieved? Is it a longer exposure?
17
votes
5answers
890 views

What is an ultra-wide lens?

What is the point at which a lens is considered "ultra-wide angle" vs just wide angle?
35
votes
3answers
3k views

Unsharp mask - what do the parameters do?

I'm interested in getting into post-processing stuff, and I'm wondering about the Unsharp Mask operation. Specifically, there are 3 parameters involved: amount radius threshold What do these do? ...
27
votes
9answers
9k views

How can I get a good HDR image from a single RAW file?

I've heard that it's possible to create an HDR image from a single RAW file. (Obviously, it won't be as good as using multiple bracketed RAW files; I know that much.) Every time I try — using ...
39
votes
13answers
10k views

Any good tutorials for learning how to post-process images?

I don't really know where to start with post-processing my images. I normally just straighten, crop and sharpen. Do people know of any good resources on the internet for getting a grip with Photoshop ...
36
votes
5answers
7k views

What should one look for when buying a used lens?

When buying a used lens, what should the buyer check? Other than looking for obvious physical damage on the outside of the lens, what else should be inspected to identify the condition or quality of ...
60
votes
10answers
4k views

How can I get my portrait subjects to look natural and drop the cheesy smile?

I am surprised by how many people automatically put on a cheesy smile when I point a camera in their direction. How can I encourage them to act more naturally, and what can I do to get better, more ...
50
votes
7answers
3k views

What are the key photography-related features from Photoshop that are missing in GIMP?

I am on a tight budget and chose to use GIMP for editing since it is free. What important photographic post-processing features am I missing from Photoshop?
25
votes
3answers
53k views

How do I calculate the distance of an object in a photo?

If I took a picture of a windmill on the horizon — given that I know the sensor size and the focal length of the lens and other factors to do with the shot — could I calculate how far away an object ...
55
votes
8answers
3k views

Why do some lenses cost 10 times as much when the specs are very close?

For example, a Canon 50mm f/1.8 lens is about US$110, while another Canon 50mm f/1.2 lens is about 14 times as expensive, at about $1450. Is the 1.8 or 1.2 the main reason for the price difference? ...
61
votes
12answers
33k views

Is there a noticeable difference between 1.8 and 1.4 prime lenses?

I have been shopping around for a prime lens for my Nikon D50. I noticed that the 1.8 is hundreds of dollars cheaper than the 1.4 AF-S. What will I gain for that cost difference? Is it really ...
27
votes
8answers
14k views

What are the major differences between these camera series by Canon?

Here is a shot of the different series of camras that Canon has to offer: There's several models of Rebel, then there's the 50D, the 5D, and the 1Ds. Broadly, which one is for whom broadly?
23
votes
5answers
7k views

How to capture the scene exactly as my eyes can see?

What settings of my DSLR camera will emulate the scene exactly as I can see through my naked eyes? I think it's not possible to get the contrast and colors exactly as my eyes can see, and it may vary ...
14
votes
7answers
15k views

How do I properly do shadowless product photos?

My friend asked me to create a photo like this. I noticed that its shadowless and my first question is whether it was setup to be shadowless, or was it made shadowless in post? How many lights are ...
14
votes
3answers
976 views

What do I need to know to get started with food photography?

I'd like to get started in food photography, and my first attempts are worlds apart from the examples we see all around us on food labels, in cookbooks, and in advertising. What are some tips to ...
25
votes
7answers
18k views

How to do the ghost mannequin effect?

I'm looking into taking some product photography and I would like to get the ghost mannequin effect, but I can't find any proper documentation. Something a bit like this: Can you please give a ...
19
votes
5answers
14k views

What is dynamic range and how is it important in photography?

Wikipedia says that the dynamic range is the "ratio between the largest and smallest possible values of a changeable quantity". Ok, I get that. I suppose that's why HDR photos have a "high dynamic ...
9
votes
6answers
12k views

What is a good general purpose lens for Canon?

As an upgrade from kit lens 18-55mm, which would be a better general purpose lens? Obviously there is no "best" option, as everyone has a different budget and style, but what are the best options ...
24
votes
3answers
3k views

What makes a strong wide-angle composition?

A simple, effective way to improve most compositions is to crop (or zoom) more tightly. Cut out the "distractions", and boom, powerful composition. I usually shoot with a slightly-long lens in the ...
17
votes
2answers
9k views

What is T-number / T-stop?

Usually, when discussing aperture of a lens, F-stop and F-number are used for quantifying. But some photographers, and especially videographers, also mention T-stop. The concept and numbering used ...
12
votes
6answers
4k views

What workflow or tools can be used for tagging of a large number of running race photos?

Let's say you attend a marathon where participants wear bibs with their race number. You take hundreds or (cough) thousands of pictures and would like to upload them to share them (for free) with ...
27
votes
6answers
15k views

What's the best way to scan in hundreds of pictures?

I have thousands of old pictures which were sitting in a photo album. Unfortunately, instead of the photo album protecting the pictures, the plastic coverings yellowed, and the pictures themselves had ...
26
votes
6answers
4k views

Why are some lens hoods petal shaped and others not?

I have one lens hood for a 28-105mm lens that is petal shaped. I have another lens hood for a 50mm lens that is fully round. If the purpose of the lens hood is to block stray light, then wouldn't ...
19
votes
4answers
2k views

When is it OK to place the subject in the middle of a picture?

When is it OK to place the subject in the middle of a picture? I took this picture and feel very compelled to put the subject in the centre rather than on the sides.
13
votes
1answer
3k views

What are the differences between an entry-level DSLR and an advanced compact P&S camera?

A Canon Powershot series camera has shutter priority, aperture priority and complete manual mode that lets the user control the shutter speed and aperture Even though an Entry-level DSLR has more ...
13
votes
2answers
2k views

What is color temperature and how does it affect my photography?

I have seen color temperature mentioned with regard to white balance, mixing different sources of light, etc., but I haven't come across a clear explanation of what it means to talk about the ...
9
votes
2answers
3k views

What are the technical advantages and disadvantages of mirrorless?

The main doubt one can have about mirrorless is, I think that they do not provide ttl viewfinder. Is this a big disadvantage? In what way is it worst (or best) than classical reflex system? What are ...
43
votes
8answers
24k views

What does “expanded ISO” mean?

The ISO specification for the Canon EOS 7D reads as follows: High ISO For handheld shooting in low light, the EOS 7D offers ISO speeds of up to 6400. Expandable to ISO 12800, for low light ...
25
votes
4answers
3k views

Do I lose anything converting to DNG?

I'd like to convert all my ARW (Sony) files to DNG for several reasons, but the only thing keeping me back from doing it is the fear of losing useful metadata during the conversion. I know that the ...
21
votes
2answers
2k views

Why use a small aperture when trying to see sensor dust?

Here and there I read of people who set their lens to a small aperture while testing their sensor cleanness, supposedly to get the best image of dust speckles. However, the image of the on-sensor dust ...
21
votes
3answers
5k views

What is 'freelensing'?

I've recently heard about a photographic technique called 'freelensing.' How do I go about 'freelensing,' and what can I do with the technique?
14
votes
3answers
7k views

What makes a camera 'weather sealed'?

What is the structural and mechanical differences between a weather sealed body and a non weather sealed body? Is weather sealing still effective if the lens isn't weather sealed?
14
votes
5answers
20k views

If I have a 18-55mm lens, is there a point in buying a 35mm prime lens?

I have the Nikon kit lens that came with a D5100 — the kit lens is 18-55mm f/3.5-5.6 AF-S DX VR Nikkor Zoom. I was thinking of getting a fast lens and I am looking to buy the Nikon 35mm f/1.8G DX. ...
11
votes
8answers
3k views

When buying entry level cameras, are lenses really more important than the body?

Original Question: Is there a D5100 alternative I was considering my first DSLR Nikon D3000, then saw D3100 and was fixed on it, then saw D5100 and I though yes,this is the one to go for. While ...
10
votes
4answers
5k views

How do I easily remove an almost-white background?

I want a "product shot" style photo of several small objects without any background (pure white background). Knowing the hours of work involved in properly deep-etching, but not having nice lighting ...
9
votes
6answers
48k views

Is it possible to increase the pixel density of an image?

I have taken a picture whose resolution is less. I can resize the image easily (i.e I can scale to higher resolution) but the image quality goes for a toss, which is true because the image might not ...
27
votes
6answers
2k views

What is the definition of a “prime lens”?

There are many discussions of differences between prime, zoom and macro lenses. I have not heard about prime lenses until recently. Could someone explain what exactly a prime lens is? Is it ...
26
votes
3answers
3k views

Does changing the focal length change focus?

When using manual focus or back focus on D60, I sometimes zoom in the lens, set the focus, and then zoom out. Does changing the focal length (zooming out), also change the focus? In case the answer ...
18
votes
1answer
535 views

What are Extension Tubes?

What are Extension Tubes?
15
votes
6answers
6k views

How does background blur (bokeh) relate to sensor size?

This is a somewhat theoretical question. Suppose I first take a photo of a subject using a full frame sensor DSLR, with a given lens (say 50mm prime lens at f/3.5). Now suppose I exchange the camera ...
14
votes
1answer
8k views

Is there a standard tripod mount?

Is there a standard tripod mount? Is it reasonable to assume that a given tripod will attach successfully to a given camera, or will I have to research my options?
13
votes
4answers
3k views

Where does the ¹/shutter speed = focal length rule for hand shake come from?

The generally accepted rule of thumb is that the shutter speed must be the same or larger than the inverse of the focal length. As is, it seems that it makes no sense as is: On a 24 Mpixels ...
13
votes
12answers
1k views

What noise removal tools work best, and why?

Can anyone recommend some good noise removal tools, free and commercial? Should support RAW and JPEG. Are certain tools better than others in particular situations? Do some integrate better with other ...
10
votes
3answers
2k views

What type of lens will auto-focus on Nikon bodies without a focus motor?

I know my D40 doesn't have a motor in it to auto-focus lenses. What type of lens has the motor in it? How can I know which lenses will and will not work?

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