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Questions tagged [lens]

A photographic lens is used to focus the light onto film or a digital sensor. Many cameras have interchangeable lens systems, allowing the photographer to choose the type of lens to use.

17
votes
13answers
2k views

What's an excellent walkabout lens?

(Happy to keep the question general, but personally interested in Canon fit) I've got a Sigma 18-125 that's served me well, but the image quality isn't stellar, it's unstabilised, max f3.5, and focus ...
22
votes
4answers
1k views

What should I consider when purchasing a macro lens?

What should I be aware of when buying a macro lens (other than that it will fit my camera)? What features should I look for? What specs should I pay close attention to? What factors affect macro ...
25
votes
2answers
1k views

Considerations when purchasing a prime lens?

What should I be aware of when buying a prime lens (other than that it will fit my camera)? What specs should I pay close attention to?
11
votes
4answers
313 views

What are important considerations when purchasing a zoom lens?

What should I be aware of when buying a zoom lens (other than that it will fit my camera)? What specs should I pay close attention to?
21
votes
6answers
3k views

Which scenarios are better shot with a prime lens versus zoom lens or macro lens?

What scenarios are better shot with a prime lens? A zoom lens? A macro lens?
8
votes
5answers
8k views

What CCTV lenses can I use with Micro 4/3 and adapter?

I keep hearing things about using CCTV C Mounts hacked into a Micro 4/3 camera using an adapter. Does anybody have any experience with this? Can any ebay lens work, or is the C-mount not universal? ...
11
votes
1answer
1k views

How can you tell if a lens is having problems with back focusing?

I recently bought a Canon EF 24-70/2.8L to use with my 450D and I suspect that it is constantly back focusing. Is there any way of determining if it is something wrong with the lens or if it is a ...
6
votes
0answers
485 views

How do I avoid getting any chromatic aberration in my photographs?

Another question is how to correct it (suggested in proposals), but ... are there ways of avoiding it in the first place?
69
votes
12answers
11k views

Are there any downsides to using a good-quality UV filter?

Are there any real downsides to using a UV filter? I know that a poor quality UV filter can effect image quality ... but, assuming I use a good quality UV filter, will that actually be an issue? Is ...
70
votes
12answers
78k 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 ...
26
votes
9answers
8k views

Should I really lug around a lens cap everywhere?

I lose lens caps by the billion. Is there another way to protect my lenses without having to carry these things around with me?