Linked Questions

33
votes
4answers
21k views

What is a macro lens?

I've read a few threads on here that mention some elementary descriptions of macro lenses and found some marketing fluff in the box for my Canon about them as well, but being a complete novice I was ...
32
votes
4answers
30k 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 ...
15
votes
3answers
10k views

Why is 1:1 desirable for a macro lens?

Why is 1:1 desirable for a macro lens? I know it means that you can print a picture of something and it will be the same size on paper as it is in real life, but why is this such a desirable feature ...
17
votes
2answers
37k views

What's the difference between a regular lens and a macro lens? [duplicate]

What is the difference between a 100mm lens and 100mm macro, or 50mm and 50mm macro? Can we use a macro lens to shot portraits? If yes, what focal length is the best? Please suggest a Canon macro ...
12
votes
4answers
3k views

How close can a lens focus?

From my understanding, if you want to do some macro photography it is better to have a lens that can focus when it is really close to the subject. Sometimes people buy extension tubes to help them ...
12
votes
1answer
18k views

What is the 'Maximum Reproduction Ratio' of a lens?

A review of a Sigma 19mm f2.8 lens contains the following line It has a minimum focusing distance of 20cm /7.9in and a maximum reproduction ratio of 1:7.4. So, as in the title, what is 'maximum ...
6
votes
2answers
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 ...
5
votes
2answers
1k views

Can a fast prime lens simulate a macro lens for food photography?

I read in this thread that macro lenses are considered good for food photography. AFAIK, macro lenses are also used to photograph insects. The lens makes them look giant, and shows up all their ...
4
votes
3answers
888 views

Can I force the aperture to stay open on macro lens?

I have a sigma 180mm f/2.8 lens, which I bought because it was the largest aperture I could find that focuses around 0.5m See this question for why this was important.. Upon arrival, however, the lens ...
0
votes
5answers
3k views

How to work out the base “zoom magnification” of a lens? [duplicate]

I've come from 3x Zoom magnification land and am having a hard time adapting to all these complex "mm" systems. I'm thinking about buying some lenses to enhance the range of zoom of my Sony A5000 ...
1
vote
1answer
144 views

Options for close-up shots [duplicate]

I'm rather new to photography, having come from an amateur hobbyist video background. I recently purchased a Sony Alpha A58, and I want to take high quality close up shots. As I understand it, I need ...