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.

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12
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2answers
1k views

Are there any downsides to buying a third party extension tubes for Canon?

I would like to get a little higher magnification out of my Canon 100mm Macro, so I am looking at extension tubes. I know Canon makes the EF25, but it seems pretty expensive considering there isn't ...
12
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6answers
4k views

How to select lenses for outdoor sports photography?

I would like to get into sports photography, and would probably want a better telephoto lens so I can get better close up shots. What other factors should I keep in mind as I make my choice? Does IS (...
9
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5answers
8k views

Which lens is sharper? The Sigma 18-50mm f2.8 or the Tamron 17-50mm f2.8?

Specifically: Sigma 18-50mm f/2.8 EX DC Macro (not the previous non-macro version. HSM is only on Nikon fit) Versus: Tamron 17-50mm f2.8 SP XR Di II LD VC Lens (not the cheaper one without ...
196
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15answers
132k views

What do all those cryptic number and letter codes in a lens name mean?

When looking at a lens name, there are a lot acronyms describing its features (often specific to the manufacturer). Examples, Nikon: Nikon AF-S DX 16-85mm VR f/3.5-5.6G IF-ED Nikon AF-I 600mm f/4D ...
10
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4answers
7k views

How many optical aberration types are there in lenses? And what are they?

Everyone hears something about chromatic aberration but are there any other types? What causes them?
10
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8answers
6k views

For greater telephoto range, should I use 70-200mm + teleconverter or a longer zoom lens?

Right now, I have a Nikon 18-200mm f/3.5-f/5.6 VR lens. I like it, but want more telephoto range and would also like to be able to use faster shutter speeds. I am interested in the 70-200mm f/2.8, but ...
7
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5answers
9k views

Are third-party alternatives to the Canon 70-200 f/2.8 worth the price savings?

Has anyone used the 3rd party 70-200 lenses? Are you happy with the quality, or do you wish you had saved up for longer and got the Canon?
15
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11answers
13k views

Which macro lens would you recommend for a full frame Nikon camera?

I use a full frame Nikon camera and would love to play with macro photography. Is the Nikon 105 macro strong enough or would you rather recommend some bigger third party lens?
10
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9answers
36k views

What lenses are must-have yet affordable for a Canon T2i camera?

I have a canon T2i camera. I am beginner looking for some tips on the best lenses to carry around.
18
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5answers
2k views

What is an ultra-wide lens?

What is the point at which a lens is considered "ultra-wide angle" vs just wide angle?
29
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6answers
13k views

Can I damage the focus system by turning the focus ring when the lens isn't mounted?

I have a couple lenses that don't have an internal focusing system, and whenever I want to put them back in my bag, I turn the focus ring to make the lens shorter. I noticed that when the lens is set ...
24
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6answers
2k views

Should I be worried about getting dust inside my SLR?

I recently went to Silverstone to watch the F1 qualifying and took my DSLR camera with me. Throughout the day, I switched lenses a few times, but each time was very conscious that there was a lot of ...
27
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10answers
8k views

Are Sigma lenses comparable to Canon lenses for a Canon camera?

I always feel that I should buy a Canon lens for my Canon camera, and Sigma would just be a cheap knock-off. Is that the case?
20
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3answers
2k views

What is Chromatic Aberration?

What is Chromatic Aberration? Is it a physical part of the lens, or just an optical illusion?
17
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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
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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
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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
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4answers
347 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?
22
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7answers
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
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6answers
9k 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
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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
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0answers
514 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?
70
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11answers
13k 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
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12answers
89k 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 ...
25
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10answers
12k 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?

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