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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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2answers
269 views

How rapidly does the focal length-equivalent image change by physically moving the camera?

I have recently begun moving from a Nikon APS-C DSLR to the Micro Four Thirds camera while also transitioning from using a viewfinder to using the LCD screen for framing my shots. Because of the size ...
4
votes
3answers
1k views

Do Nikon AF-S lenses perform better than AF lenses?

I am going to be getting a Nikon D7000 soon. I think I'm correct in assuming that the Nikon D7000 will use its own focus motor for an AF lens, but allow the lens to use its motor for an AF-S lens. ...
4
votes
4answers
3k views

Best all-around ~$600 standard zoom lens for Canon?

I have a Rebel T2i, I was wondering what standard zoom lens is the best around $600. I'm mainly shooting landscapes / cities / peoples. I've done some research and came up with 17-50, 18-55 from ...
4
votes
3answers
573 views

How to avoid lens flare?

I often have slight reflections in my lens when the sun (or another bright source of light) is directly in front of my camera. As a result of this effect I had to change the composition of my picture! ...
4
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7answers
1k views

What's a Good All Purpose Compact Lens for a dSLR …?

Following on from an earlier post, I've decided to persevere with the behemoth for a bit and see where it goes. It may lead in the direction of a Canon G11/12 or S90/95 - only time will tell. In the ...
4
votes
3answers
529 views

Choosing first lens for Nikon D-90 body

I'm looking to get a prime lens to go with the Nikon D-90 body. I'm looking at 50mm or 35mm and f/1.8 or f/1.4 and AF or AF-S. It appears that VR (Vibration Reduction) is not an option for any of ...
3
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2answers
4k views

What's the difference between Canon EF-S and EF-M?

What is the difference with Canon EF-S and EF-M lens?
3
votes
2answers
896 views

What causes longitudinal chromatic aberration on Nikon 50mm f/1.4D?

I have looked on my new 50mm lens photo (I have Nikon D90) and I see "purple fringing" around the unfocused objects (longitudinal chromatic aberration). What's is going on? Is it common for this lens ...
3
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1answer
544 views

Does maximum aperture change with focus distance with the Canon 60mm f/2.8 macro lens?

This site says The Canon EF-S 60mm f/2.8 Macro USM Lens loses 1/2 stop at 1:5, 1 stop at 1:3, 1.5 stops at 1:1.5 and 2 stops at 1:1 (lifesize). Can anyone confirm that at 1:5 magnification, ...
2
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4answers
189 views

What improvements I could expect upgrading from Canon EF 55-250mm IS to a Canon 70 - 300mm? [duplicate]

I enjoy taking photos with my current telephoto (55-250) but I wonder if the 70-300 could be a worthwhile upgrade. As of November 2013, it would be around a $350 investment if I deal hunt and sell my ...
2
votes
3answers
207 views

Where should one go in terms of equipment for event shooting after a D7000 kit?

I'm still new at photography -- really, it is going to be a long while before I can get close to the potential out of the D7000 kit. However, Microsoft recently has been giving me the opportunity to ...
2
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11answers
7k views

What Canon lenses do you suggest for wedding photography on a tight budget?

I am new to photography. I have Canon 1000d (with 18 -55 mm lens). My basic interest is wedding photography. I am planning to get a prime and a telephoto lens. So, my dilemma is: Should I go for ...
14
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5answers
3k views

What's the difference between the Canon and Nikon lenses mounts?

I was wondering what, if any, are the technical differences between the two mounting systems. Does one auto focus faster? Can one hold more weight? Things along those lines that make them different. ...
14
votes
5answers
304 views

Is it possible to adapt lens from one brand into another brand's body?

I'm thinking about buying my first DSLR (I have no experience) and was thinking about the lens brand issue. I'm thinking I should buy a Pentax Kx because of it's cost-effective value, but I'm ...
13
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4answers
470 views

Does Canon make an L series lens with a plastic lens mount?

An online retailer is telling me that Canon 24-105 f4L lens comes in two versions, the USA model with a steel lens mount and an import with a plastic lens mount. Is this true?
12
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4answers
2k views

Is there a drawback in buying an imported (gray market) lens?

I am planning to buy a Nikon 55-200mm lens and I was checking prices at B&H and there is a $30 difference (almost 15% of cost) between "Imported" and "USA" lenses. What is the difference between ...
11
votes
4answers
1k views

Are there any Canon EF-S prime lenses or tele-zooms?

Canon is supposed to have introduced the EF-S system for the APS-C cameras to make smaller\lighter lenses and keep the costs low. However, most of their EF-S lenses are general purpose zooms in the ...
11
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4answers
808 views

What does 'Equivalent to 1.6x the focal length of the lens' mean?

In the specifications of Canon 550D, about the lens the following is mentioned LENS Lens Mount EF/EF-S Focal Length Equivalent to 1.6x the focal length of the lens Now this is really ...
11
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1answer
3k views

Does image quality of a lens depend on the camera used?

I recently bought a Canon 50mm f1.8 for my Canon 1000d. But, I find that the images are not as sharp as those I saw in the reviews or any other images taken using other cameras like the 550d and ...
11
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4answers
560 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 ...
10
votes
2answers
1k views

What is the benefit of an internal focus lens?

The "IF" in Pentax DA★ 200mm f/2.8 ED (IF) SDM stands for "Internal Focus". I know what this means: the lens doesn't change in size as I focus. (And it's true; it doesn't.) What's the point of this, ...
10
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4answers
2k views

How wide can a lens be before it begins to produce distortion?

Some lenses will produce distortion near a photo's edges (lines that should be straight begin to curve). Fisheye lenses definitely do this, and some ultra-wide lenses will do this too. I like wide ...
10
votes
1answer
375 views

Can anyone identify this lens?

I read once, in a book, about a lens that was an "inverse fisheye". Basically a hemispherical mirror mounted at one end of a glass tube. I can't remember what it was called, nor can I find any ...
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6answers
1k views

What should I do to avoid switching lenses?

I'm thinking of buying a telephoto lens for my Canon 550D (3x zoom isn't very helpful), but I won't be able to do very good macro shots with it. Since I do a lot of both, I would be switching lenses ...
9
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5answers
4k 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) Vs. Tamron 17-50mm f2.8 SP XR Di II LD VC Lens (not the cheaper one without vibration ...
8
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5answers
3k views

Will a lens with a low aperture value give me better portrait photos?

I want to take pictures of people from 5-20 feet away. I attend lots of group events and am free to walk around and snap photos. I just purchased a Canon t3i and it comes with a 18-55mm kit lens. The ...
8
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6answers
308 views

Aside from sharpness & speed, what are the benefits to photo composition\optical quality provided by premium lenses over their cheaper counterpart?

I have gone through quite a few lens reviews and questions on this site that recommend expensive lenses over their cheaper counterparts. From what I've seen in the reviews, there is a marked ...
8
votes
3answers
263 views

What is good equipment to buy/hire for a generalist photographer, new to event photography?

I'll soon be covering an event, and my existing lens set isn't necessarily ideal for low-light people photography. As with many events, this may be both indoors and outside, and runs throughout the ...
7
votes
5answers
1k views

How much different are the Tamron 17-50mm f/2.8 stabilized (VC) and non-stabilized versions?

I have seen these 2 lenses being suggested by many people across the site as general purpose zooms and an upgrade to the typical 18-55mm kit lenses. The price difference seems to be around $200 (~INR ...
7
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3answers
781 views

Is pincushion or barrel distortion really all that bad in a lens?

Given that software can pretty trivially fix pincushion and barrel distortion patterns if you're shooting in RAW (Lightroom did the right thing just by knowing what lens I used with the given EXIF ...
7
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4answers
536 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 ...
7
votes
4answers
451 views

Were lenses for film designed to focus different colors at different depths, and what does that mean for digital?

I was reading the book Adobe Photoshop CS5 for Photographers: The Ultimate Workshop by Martin Evening & Jeff Schewe (Focal Press. 2011) and read this paragraph about film lenses and DSLRs: … ...
7
votes
6answers
228 views

Is it technically possible to build a camera body to correct for lens defects?

Most lenses tend to be expensive because the lens needs to be very complicated in order to correct for various optical effects (aberration, etc). Is it possible to build a sensor and processor ...
7
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7answers
427 views

How come some 3rd-party lenses cost more than those from the manufacturer?

I was trying to save some cash on a 50mm f/1.4 for my Nikon d7000. I see the Nikon 50mm f/1.4 costs almost $400 USD. I thought a 3rd-party lens would be cheaper so I checked out the equivalent Sigma ...
7
votes
2answers
705 views

Pentax to Canon Adapter

My dad has an old Sears KS-2 + 50mm f/1.7, which from a bit of research seems to use a Pentax K-mount. I've looked around a bit and found a Pentax to Canon adapter, which says it supports ...
7
votes
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 ...
7
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5answers
1k 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?
6
votes
1answer
305 views

How to Restore Old Lenses?

I often visit an antique shop that sells gadgets like old cameras, equipment and lenses. I'm particularly interested on buying an old macro lenses from Sigma, Ricoh, and Nikkor. I would expect the ...
6
votes
1answer
431 views

What is Power Focus on a Canon lens?

A few of the most recent Canon telephoto lenses a feature called "Power Focus" or PF. What is the purpose of the setting and does it benefit photography at all? I have found the following lenses ...
6
votes
1answer
313 views

When focusing at max zoom, focus is lost after zooming out. Is that normal?

On my Canon kit lens, I could completely zoom in, focus on the object and then zoom out to take the picture with the object still in focus. Now I have a Sigma 18-200mm (with a Canon 600D) and that ...
6
votes
2answers
1k views

Any reason to buy stock lens for Sony Alpha if I already have good Minolta Maxxum lenses?

I am a novice photographer looking to get into DSLR photography. I have an old Maxxum 5 and a couple lenses for it: a 75-300 zoom and a 28-80 zoom. After reading this question, it is clear that ...
6
votes
1answer
3k views

Why is my Nikon d3100 with 18/55 lens suddenly fuzzy?

I was taking some inside pictures with my Nikon D3100 and 18/55 lens when, all of a sudden, the lens started to work funny -- the more I zoomed in on the subject, the fuzzier the picture looked in the ...
6
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2answers
484 views

What is the effective aperture of two stacked lenses for macro?

Is there a way to calculate the aperture of two lenses stacked together for macro? In my specific case, I have 90mm f/2.8 and 18mm 1/3.5 lenses.
6
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2answers
959 views

Why are some lenses so expensive?

I have read about and seen many lenses that are very expensive; upwards of 8-10 thousand (US) dollars. I ran across this lens and it was priced at an incredible 26,000 dollars. And this one at ...
6
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6answers
1k views

Is it important that the Canon 1DX isn't specified to autofocus with lenses slower than f/5.6? [closed]

Seeking the lens market AND the related info WRT Canon 1D X, I found some things which seems concerning: 1st, a note from Canon's Chuck Westerfall (see here) saying: “AF is unavailable on the ...
6
votes
4answers
1k views

Where can I rent a camera and lens online within the US?

I'm considering buying a Canon 5D Mark II camera with Canon EF 24-70mm f/2.8 L USM Lens. But before I buy, I would like to rent it to try it out. Where can I rent camera gear online, and have it ...
6
votes
0answers
343 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?
5
votes
1answer
321 views

Why are so many kit-lenses parfocal if it's an expensive feature?

According to this answer, parfocal lenses (lenses that can zoom in/out without losing focus) are relatively rare and more expensive. However, the original poster's kit-lens is parfocal. ...
5
votes
1answer
163 views

Is Canon MP-E 65mm f/2.8 1-5X macro lens good for photos other than close-up macro shots?

Does this lens do a good job for photos other than close-up macro shots? For example, does it make sense to use this lens for outdoor family portrait photography? What are some other common uses for ...
5
votes
4answers
446 views

What's the difference between vignetting and pinhole?

Sometimes people say that a lens has bad vignetting but it looks very similar to the effect of pinhole (darkened edges). What's the difference? If someone asked to have a vignetting effect (in PP) ...