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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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Portrait lens for Canon T1i [duplicate]

Possible Duplicate: What is a good Canon lens to take portraits? I have a Canon Rebel T1i camera. I am thinking of buying a Canon EF 50mm f/1.8 II lens for portraits. Is it the right lens ...
12
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3answers
6k views

Which is better: Canon EF 70-300mm f/4-5.6 IS USM or Canon EF 70-200mm f/4.0 L USM (without IS)?

Simple question: Which lens is better? The L Series (non-IS) Canon EF 70-200mm f/4.0 L USM or the Canon EF 70-300mm f/4-5.6 IS USM? I am an enthusiast and usually shoot landscape, my kids playing ...
15
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9answers
2k views

Are all kit lenses poor? (And if so, why?)

Kerri Shotts says (emphasis mine): Also, if you already have great glass, there is little reason to get more (unless you need it for a certain reason). E.g., if you have a 70-200 f/4, don't rush ...
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2answers
2k views

What can damage a lens?

I just bought a Canon dSLR camera with an 18-135mm IS lens. I really want to take care of it, as I paid extra for this "better" lens, so can the lens get, in some way, damaged if you drop it, say 5 ...
2
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6answers
829 views

Is the IS of the Canon EF 100-400 4.5-5.6 L IS USM Telephoto Zoom worth the extra £200 over the Canon EF 400 f/5.6 L USM Lens? [duplicate]

Possible Duplicate: What size lens is recommended for flying bird photography? I am having trouble deciding which lens I should buy my wife to go with her new Canon 7D. She uses it mainly ...
13
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5answers
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What size lens is recommended for flying bird photography?

My wife has a Canon 450D and a 70-300 lens for long distance shots. I am considering a present or two and good advice from jrista suggests possible upgrade of camera to a Canon 7D and of lens to a ...
9
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6answers
3k views

What does small depth of field mean?

Can anyone clarify for me the various terms used to describe depth of field? There are so many it's hard without a photo dictionary to relate in my head what's actually being said to me about the ...
5
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6answers
2k views

In what situations should I use which lenses while traveling to Paris?

I'll be travelling to Paris and I'll be bringing me with a Canon T2i/550D, a Canon EF-S 18-200mm f/3,5-5,6 IS and a Tokina 11-16mm f/2,8 (I could also bring a Canon EF 50mm f/1,8 II). I bought the ...
9
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2answers
6k views

What's the difference between the Lensbaby Composer and the Composer Pro?

What's the main difference between the Composer and the Composer Pro? The only difference that the reviews mention is the metal construction. Has anyone tried both? Is there any significant ...
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5answers
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How do I find the aperture that produces the highest-quality images for a given lens?

I'm not talking about large aperture (f/1.8, f/2.8...), rather, about small apertures (f/18, f/20, f/23...). I read somewhere (actually I think it was on this site, but I don't exactly remember which ...
5
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2answers
1k views

Is there a Tamron 70-200mm lens which is optically superior to the Canon 70-200 f2.8 IS?

In the June 2011's Popular Photography magazine (Canada, hard copy, pg. 90) in an article titled "Star Power", on a one page overview of the Canon 70-200mm f2.8L IS II USM, the author (Julia Silber) ...
7
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4answers
881 views

How can I find the right lens cap for my lens?

I own a Nikon D3000 Camera with the AF-S 18-55mm VR Kit Lens. Last week I lost the lens cap and now I want to buy a new one. But when I went to this online store, I got confused with the different ...
2
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2answers
694 views

Is Nikon AF 70-300/4.0-5.6 G Black Nikkor Lens compatible with Nikon D80?

I'm looking at the Nikon AF 70-300/4.0-5.6 G Black Nikkor Lens, and that page says that it's not compatible with Nikon D40, D40x, D60 and D5000. I'm not sure - would it work with my D80?
4
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1answer
1k views

Is AF-S DX Micro NIKKOR 85mm f/3.5G lens good for both macro and portrait photography?

I'm thinking of buying a macro lens am considering the Nikon AF-S DX Micro NIKKOR 85mm f/3.5G ED VR. Is this lens really good for portraits? Where can I find sample pictures taken with this lens? Is ...
17
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13answers
3k views

What is a good two lens “starter kit”?

A friend of mine is buying his first DSLR. He's chosen an entry-level Canon model, and wants to know which lens he should go for. My advice is to go for a good 70mm prime and an 18-200mm. The former ...
10
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3answers
1k views

What Pentax macro lens do you recommend for outdoor activities?

I am a Pentax K20D owner, and now I'd like to buy my first macro lens. Candidates I consider are: Pentax-D FA 100 mm F2.8 Macro 365 g, 560 €. Pentax-D FA 100 mm F2.8 Macro WR weather-resistant, 340 ...
5
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2answers
787 views

Which Nikon-mount Sigma macro zoom lens for a beginner?

I am a photography beginner. I have a Nikon D90 with the kit lens. I am planning to buy an additional lens. I started with a Canon S3IS, and shot some macro photos, which I think are good. I want ...
21
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9answers
2k views

How to choose a lens for my first DSLR?

I am considering buying my first DSLR. How do I know whether I need a 18-200 lens, 17-85, or 18-55? Or something else?
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5answers
10k views

What does the f-stop printed on the lens refer to?

I have read this,so I know what an f-stop is, but what does the number on printed the lens signify? Is this is the maximum f-stop, the ideal, or something else?
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5answers
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What is the effect of a scratched lens?

I have a lens with a small but significant looking scratch near the center. But I don't see any difference in the photos. Where does the imperfection show up? How important is it to get the piece of ...
10
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4answers
5k views

How well do tilt-shift lenses work for nature/landscape photograhy?

I am in the market for at least one wide-angle prime lens. I've focused most of my search on 50mm and 24mm prime lenses from Canon, Zeiss, and Sigma. Crossing paths with another avenue of research in ...
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1answer
8k views

Sony 18-250 or new Tamron 18-270 lens? Which has better autofocus?

I want to buy either Sony 18-250 F3.5-6.3 or the new Tamron 18-270 F3.5-6.3 as a travel lens for Sony A55. I have found good reviews that told me quite something about image quality of these lens. ...
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3answers
1k views

Does my L lens need UV filtering, or does it already cut out UV?

Now I know the "should my expensive lens have cheap glass on the front?" is an age old question that will never be agreed upon and ends up down to preference. What I'm interested in is the UV vs ...
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1answer
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Can the slant edge SFR method measure lens resolution greater than the Nyquist limit for the camera sensor?

The slant edge SFR method has become the standard for measuring resolution of lenses and camera systems. It works by scanning a five degree slanted edge to calculate a line spread function. This is ...
21
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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?
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1answer
282 views

Can the Sony A55 software-correct lens aberrations like the Panasonic GH2 does?

Panasonic GH2 automatically corrects lens geometric distortion and chromatic aberration. If I understand it right, it always applies this correction just after reading from the sensor — so the image ...
4
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3answers
1k views

What macro lens should I buy in place of the 18-55mm kit lens?

I am planning to buy a Nikon D5100, body only. I'd like to go with a macro lens which gives better results than the 18-55mm, as I have heard that the results from this basic kit lens are not good. ...
2
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1answer
532 views

Which 70-300mm f4-5.6 lens is “better?” [duplicate]

I'm looking for a budget telephoto lens and I'm wondering which of these two is the better option. They have very similar specs: Tamron AF 70-300mm f/4.0-5.6 Di LD Macro Zoom Lens for Canon Digital ...
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0answers
151 views

What benefits are there from autofocusing with the lens rather than with the body? [duplicate]

Possible Duplicate: How do camera body motors compare to in-lens motors for focusing? I have read in this question that the lens motor will be the one doing the focusing if both the body ...
23
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10answers
6k views

Canon 50mm lens: f/1.2 L or f/1.4? Alternative brands?

I am in the market for a 50mm lens for my Canon DSLR. I've read plenty of reviews, and all of them have great things to say about both lenses. From a scientific perspective, the f/1.2 performs better ...
36
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4answers
3k views

Should I get DX for my APS-C camera, or FX lenses in case I upgrade to full-frame in the future?

I recently bought a Nikon D90 camera body, which has a "DX" APS-C-sized sensor.. Within the same budget, should I go with DX lenses or should I get full frame lenses in case I upgrade to a full frame ...
2
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1answer
137 views

Are newer production runs of the Canon EF-S 55-250mm f/4.0-5.6 upgraded from older models?

I was considering buying the Canon EF-S 55-250mm f/4.0-5.6 lens from someone, however, they told me that they purchased it more than two years ago. I am concerned that some of the new productions of ...
2
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1answer
367 views

Is the BxU measure of lens resolution still used by anyone?

The background In 2004 DxO released DxO Analyzer. It pioneered a new measure of lens resolution that it called BxU or Blur Experience Unit. Luminous Landscape reported on it (DxO Explained) and ...
33
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2answers
2k views

How do I interpret an MTF Chart?

As part of how Canon (and other lens makers) give technical information about their lenses, they supply an MTF (Modulation Transfer Function) chart. How do I read and interpret what the chart is ...
4
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1answer
527 views

Is there a lens hood, step up filter ring combination in the market?

I have a 58mm filter threaded lens and I want to use my 77mm filters on it. I thought maybe I could buy a hood that is double threaded for different sizes. This would probably look less awkward than ...
3
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3answers
773 views

What's a good lens for my Canon G7?

I'm not a professional photographer, but I use my camera on a regular basis to photograph my familiy and activities I attend. I own a Canon G7 (older version of the G11) and instead of upgrading to a ...
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2answers
238 views

What canon lenses should I buy? [closed]

I am looking to buy 3 canon lenes for my EOS 7D. What are the three best lenses that will help give me different ranges. I want to get a fast general purpose zoom lens, a macro lens and a telephoto ...
3
votes
1answer
2k views

How do the Pentax 18-55mm and 18-135mm compare in image quality?

I've been reading a lot about the Pentax DA 18-135mm lens and its performance compared to other lenses. I've heard that this lens is very soft at 135mm regardless of aperture. However, I've also ...
19
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1answer
2k views

What is decentering?

I have heard of a condition in imperfect lenses known as "decentering". What is decentering? When a lens is decentered, what exactly is wrong with the optical elements? What are its symptoms and ...
2
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1answer
134 views

How to learn enough about lenses to be able to evaluate a lens manufacturer?

I've been doing research to purchase a DSLR. I think I have a handle on how to evaluate a body, feature-wise, but I'm finding it difficult to understand lenses. Since buying a body locks you into a ...
7
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8answers
2k views

Is the Nikon 35mm f/1.8 AF-S being replaced?

I need a fast lens with autofocus for taking indoor shots with my Nikon D3000. I have been looking at the Nikon 35mm f/1.8 AF-S for a while and now that I am ready to get one they are next to ...
15
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5answers
2k views

Why choose an 80-200mm over an 18-200mm lens?

Being a beginner, I can't see why I must choose an 80-200 over an 18-200. Are there scenarios where an 80-200 would be preferable over an 18-200? I will be buying a D7000 soon and am looking at ...
12
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3answers
2k views

Does a camera's crop factor apply to the magnification of macro shots?

If I have a lenses (or in my case extension tubes) that would allow the lens to magnify 1:1, does a 1.5x crop factor body make it really 1.5:1 ?
2
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6answers
472 views

What would be a good wide angle lens to rent for Nikon?

I have a Nikon D5000, and am looking to rent a wide angle lens for a day. Any suggestions as what should be a good lens to try out?
10
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4answers
295 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?
4
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3answers
343 views

How do I troubleshoot Canon EF100-400L IS USM failure?

I use my EF100-400 on a Canon 10D. While in IS and auto focus mode, I was shooting a soccer match when the lens abruptly failed to focus, and I got an error message on the camera. I turned off the ...
9
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3answers
6k views

Is acetone safe and effective as a lens cleaner?

I recently came across a clip on youtube which showed the process of making camera lenses. I noticed them using acetone as a lens cleaner. My question is how effective is acetone as lens cleaner? Will ...
17
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5answers
3k views

When would one need manual focus override?

In lens reviews, ability to override auto-focus manually is often referred to as a good (and important) feature. I have rarely, if ever used that feature, so I feel I might be missing out on an ...
6
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2answers
637 views

Are reverse mounts only for use with prime lenses?

Are reverse lens mounts only for use with prime lenses? I was wondering if I could use my zoom lens with a reverse mount.
3
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3answers
557 views

How do I choose a zoom lens to replace the kit lens?

I have a Canon 1000D with a 50mm f/1.8. I also have the 18-55mm f/3.5-5.6 kit lens, but I am not very satisfied with its performance. I'm looking for a better zoom lens. I have a budget of around ...