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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.

learn more… | top users | synonyms (1)

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How can I determine if my Sigma 10-20mm lens copy is appropriately sharp and focusing right?

I just purchased a Sigma 10-20mm lens (Canon mount) and based on the reviews I was aware that many people receive copies of the lens that are soft or don't focus properly. I purchased from B&H, so ...
4
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2answers
1k views

What is a “4P” Lens?

I am a noob in photography and don't have any idea of lenses and optics... Recently though I was looking out for some camera modules and couldn't understand some of the specifications mentioned in ...
7
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4answers
2k views

Is the Canon EF 35-105 lens compatible with Canon T2i body?

I recently upgraded to a T2i from the original Digital Rebel. I usually used the Canon EF 35-105 lens on the old Rebel. When I put that lens on the T2i after about 5 seconds everything goes off on ...
11
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4answers
596 views

How compatible are my old Nikon lenses

I'm looking at buying a new SLR body. I have an old film Nikon entry-level SLR (about ten years old) with a kit lens. If I buy a Nikon body, how likely is it that my old lens will work on it? Would I ...
22
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3answers
7k views

How can a 18-55mm lens focus on objects beyond 55mm?

I guess this is a total noob question, but doesn't 18-55mm mean that it can focus only up to 55mm?
4
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3answers
541 views

The green light is blinking on D5000 when I mount a Sigma 24-70 EX DG Macro

I just got the lens. I know it doesn't autofocus on my camera body because it doesn't have built in motor but at least it should be usable in manual mode right?
11
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4answers
2k views

Is it problematic to mount a Canon EF 100-400mm f/4.5-5.6L lens on Rebel XSi (450D) body?

I have a Canon Rebel XSi (450D) and I'm going on a two week trip to Argentina and Patagonia where I want to try some wildlife photography. I have the kit 55-250 f/4.5-5.6 lens which I like, but I ...
8
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4answers
552 views

Fixed HQ lens with image crop or medium quality zoom lens?

Is it better to spend my money on a medium quality say 15-85 zoom lens or a very high quality fixed lens at say 24MM. (e.g 24mm 1.4 L canon) and crop in - not blow up beyond normal resolution). A ...
13
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3answers
2k views

Do you have advice for buying my first lens after kit 18-55mm (sub-$300)?

Iā€™m looking to buy my first lens beyond the kit 18-55mm for my Pentax K-x. As a student my budget limits me to around a sub $300 offering. I am new to photography, and so I have a hard time answering ...
14
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7answers
929 views

Upgrade strategy for Canon EOS DSLRs

In February 2010 I bought my first DSLR: EOS Rebel XSi EF-S 18-55IS Kit I also bought a zoom telephoto lens: Canon EF 70-300mm f/4-5.6 IS USM The XSi is a simple camera which I thought would be good ...
13
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6answers
2k views

What should I do to switch my gear from Sony to Canon?

So I currently have a Sony A700 which i bought a year ago, and wanting to get some quality glass. I was looking at the Carl Zeiss 24-70/f2.8 lens, but then got talking to a friend who's a canon user. ...
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5answers
3k views

What are the most notable differences between Canon and Nikon lenses?

I'm currently considering to buy one of the next generation enthusiast DSLRs. Either a Canon EOS 60D or the slightly more expensive Nikon D7000. I'm quite new to the SLR discussion but I know there ...
4
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3answers
659 views

Is the kit lens focal length specified for APS-C or FF?

I have the 18-55mm kit lens for my Canon 50D and was wondering if they're still specified against full frame 1:1 crop? Would my 18mm actually be 1.6x? I ask because I doubt anyone with a full frame ...
6
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4answers
9k views

Canon kit with standard EF-S 18-55mm IS or 18-135mm IS?

I'm going to order a new Canon 550d in a kit with a lens. I'm fairly new to SLR photography which means I have not much knowledge about the difference between lenses. There is an offer for a Canon ...
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5answers
9k 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?
7
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4answers
1k views

Where can I get an extension tube for micro-four-thirds lenses?

There doesn't seem to be any extension tube set listed on the m4/3 section of the Four Thirds website. Olympus makes the EX-25 extension tube but it's for regular Four Thirds lenses. I would like to ...
11
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4answers
2k views

Lens “family” names - what do they mean and should I care?

Some lens manufacturers have special names for their lens designs/families. Just to name a few: Leica - Summar/Summarit/Summilux, Elmar/Elmarit, Noctilux Carl Zeiss - Planar, Tessar, Sonnar, ...
7
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1answer
859 views

Cleaning a sticky DSLR lens

I was on vacation recently and some coke accidentally splattered on one of my DSLR lenses. It was dark and I was pushing a stroller, so I didn't see what was going on until it was too late. I ...
17
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7answers
1k views

Tips for shooting in an aquarium?

What would be your advises when taking shoot in an aquarium? What are your preferred lenses? How do you deal with the low light? What about the aquarium glass which bring some deformation? The fact ...
40
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8answers
7k views

Why is the 50mm prime lens the most standard?

Seems that most photographers choose the 50mm as their prime lens (at least from what I've read). I'm looking at getting a prime lens for my Nikon D3000 and the cost difference between the 35mm 1.8 ...
13
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1answer
472 views

Is dust in a zoom lens a problem which should be addressed?

I have accumulated some amount of dust inside one of my zoom lenses, visible through the front glass. It does not appear to affect picture quality as far as I can tell, but I wonder if this is ...
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5answers
1k views

What are the pros and cons of non-extending zoom lenses?

Apart from the obvious benefit of not changing the center of gravity, what are the technical pros and cons of zoom lenses that do not change "physical length" when changing the focal length? For ...
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4answers
1k views

Why buy an expensive manual focus lens?

What are the benefits of (expensive brand new) manual focus lenses? Why did you, for example, buy a manual focus Carl Zeiss 85/1.4 rather than an auto-focus Nikon 85/1.4? I'm not concerned with ...
6
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3answers
3k views

What is Nikon's equivalent to the Canon L series EF 24-70 2.8?

I would like a great multi purpose lens that could work of a full frame body. At the moment am tossing between getting the 24-70 2.8 from Canon or selling my gear and moving to a Nikon (since all my ...
25
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4answers
4k views

How do you find out the “sweet spot” of a lens?

I've tried googling this, but have never found a satisfactory answer. I've heard the term "sweet spot" thrown around by some photographers to mean the f-stop of a lens which results in the highest ...
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2answers
674 views

Why can only certain Canon lenses be fitted with an extender?

Is there a reason only certain lenses can be fitted with an extender? I'd really love to be able to fit the extender to some of my cheaper lenses.
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2answers
754 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 ...
18
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12answers
19k views

How does the lens diameter influence photo quality?

I have tested two different 50mm lenses in my camera. One was a Nikkor 50mm āˆ…52mm. The other one was a Sigma 50mm āˆ…72mm. I took some pictures with both lenses using the same setup for aperture and ...
7
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2answers
2k views

Canon 5D Mark II vs NIkon D3x for studio/wedding work?

I do mostly portrait work, in a photo studio or for weddings, and need to know which camera will best serve my needs. I'm also interested in learning which lens will best support portrait photography. ...
14
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3answers
3k views

Can I use a Canon 100mm f/2.8 macro lens on a Canon EOS 450D?

My wife has a Canon EOS 450D and, after following a few threads and questions and answers, a Canon 100mm f/2.8 Macro lens seems to be popular for insect photography. I am considering buying one for ...
9
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2answers
312 views

Examples from the Nikkor Micro 105mm f/2.8 on a full frame camera

This is more of a request than a question. I'm considering getting the aforementioned lens but I'm a bit afraid that it may not allow me to produce as much magnification as I would hope for. That's ...
8
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1answer
333 views

Tips for using the Lensbaby 3G?

I just picked one up as a much less expensive option than a tilt/shift lens for the Pentax mount (they're hard to find and crazy expensive for the K-mount). I have done some experimental shots with ...
10
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3answers
425 views

Are fast lenses only fast when shot wide open?

Given two lenses with different max apertures but the same size image circle (say, full frame on a Nikon FX DLSR camera) and taking shots at the exact shutter speed and focal length under the same ...
5
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4answers
649 views

Will I regret buying an older lens that doesn't autofocus or have image stabilization with my Nikon D5000?

I am planning to buy a Nikon Normal AF Nikkor 50mm f/1.8D Autofocus Lens. It doesn't autofocus on the D5000 but for the price, I think it's a good choice of lens for portrait. What do you think? ...
14
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4answers
11k views

What is a 200mm lens good for?

I just found that there is a 200mm lens at my school. It is a Canon with Image Stabiliser (with red detail). It is old, at least 10 years. It has been great playing around with it, but I really don't ...
22
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7answers
2k views

Why do some lenses cost so much?

Something that confuses me is why there is some lenses that cost so much. For example the only difference that I see between the two lenses is the aperture: f/2.8 vs f/4. Canon EF 70-200mm f/2.8L II ...
12
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8answers
19k views

What is a good wide-angle prime lens for Nikon DX (APS-C) format?

I am looking for a wide angle lens for my D90, between 12 and 18mm focal length, preferably a prime, because I like fast(er) and cheap(er) lenses. Any recomendation ? Thanks
10
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5answers
3k views

Is the Nikon 35mm 2.0 worth the extra money over the 1.8?

After asking this question I'm thinking the 35mm prime lens will do the job for me. Since I take a number of photos indoors and in low light conditions, this lens will let me sty reasonably close to ...
5
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3answers
3k views

How does Canon EF 75-300 f/4-5.6 III USM perform for photographing distant objects?

Does anyone have and could share experiences with the use of? I can buy cheap lens Canon EF 75-300 f/4-5.6 III USM for my Canon EOS 550D What I have found yet is that it hasn't IS and is quite old ...
8
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7answers
2k views

Which lenses are best for macro and for birdwatching (both Canon and Nikon)?

Now I have old Sony A100 DSLR + Minolta AF 24-50/4, Minolta AF 50/1.6, Tokina ATX 80-400/4.5-5.6, ... My camera is old. In near future I am going to buy new DSLR. I think it will be Canon or Nikon. I ...
19
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2answers
1k views

Why am I allowed to turn my focusing ring beyond infinity?

Is there a good reason why I can turn the focusing ring on my lenses beyond infinity mark on focusing scale? Following recent questions here and here, it sounds like a real usability issue. ...
8
votes
2answers
243 views

What do you do to service a lens?

According to this question, proper maintenance & treatment is need to ensure a long lens life. But other than occasional cleaning, I've never done anything to any of my lenses. What else should ...
13
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5answers
2k views

What can cause an “Err 99” on my Canon 20D with EF-S 17-85mm lens, and what can I do to resolve it?

Err 99 Shooting is not possible. Turn the power switch to <OFF> and <ON> again or re-install the battery. Every now and then when shooting with this lens, I'll get this error ...
18
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7answers
5k views

What is a great portrait lens for Nikon (under $1000)?

I am currently shooting with a Nikon D90 and use the kit 18-105 lens and a 50mm f/1.8. Mostly I shoot as a hobby but lately I've been asked to do some family and engagement shoots. The 50mm is ...
20
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6answers
2k views

How long should a lens last?

There are loads of ratings and tests for how long DSLR bodies last, but I have never really seen much that describes the expected lifespan of lenses. Recently, one of my cheap-o lenses (Nikon ...
27
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2answers
3k views

What is a pancake lens?

I've read about a "pancake lens" but don't really understand what that means. What the pros and cons of having a pancake vs. another type of lens? I'm thinking of getting a Panasonic Lumix DMC-GF1 ...
12
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4answers
2k views

Sigma 10-20mm f5.6 alternatives?

I've been wanting to add a wide angle lens to my collection for a while now. Sigma 10-20mm f5.6 looks good. I was looking at it about 2 years ago. I was wondering if there have been newer wide angle ...
10
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6answers
4k views

What is a good Canon lens to take portraits?

I have a Canon T2I, and also a good prime lens (50mm / f1.8) but I cannot seem to take close up portraits like I see in magazines. Do I need a better lens?
11
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3answers
2k views

What are M42 prime lenses?

How can I use these prime lenses for Canon T2I? Are these cheap and good? I have no clue what M42 lenses are. Please post appropriate links for the lenses and adapter that I can use for my canon t2i.
18
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4answers
2k views

Can I use old Pentax lenses on newer Pentax DSLRs?

Can I use old Pentax lenses from the film days on the newer Pentax DSLRs? Are there any caveats or exceptions? Are adapters or modifications needed?