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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
116 views

Why are lower focal length lenses wider? [duplicate]

Most of the wide angle lenses are lower focal length and the telephoto lenses are of longer focal length. Can someone explain (scientifically) to me how shorter focal length of the lenses is help to ...
4
votes
4answers
222 views

Is it possible to get smaller aperture with diaphragm in front of the lens?

My camera has narrowest aperture of f8. To increase depth of field, could I place an opaque "filter" or lens-cap with a small hole, e.g. 12 mm for f16, on the lens? I realize that at short f.l. the ...
2
votes
3answers
157 views

What is the best lens for shooting flat surfaces?

For a long time, I was making closeup photographs of flat surfaces using my cropped DLSR and Canon EF 50/1.4 lens. The scene was illuminated by an external flash. The focusing distance was the closest ...
1
vote
1answer
176 views

How do add on macro smartphone lenses allow you to take macro photos?

It may sound obvious, but how exactly does an add on macro lens allow you to take close up photos? Can someone give technical reasons? I'd like to know the physics behind add on macro lenses and how ...
14
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1answer
875 views

How does a macro lens focus so close?

How does a macro lens focus so closely and how is the system different to that of a non-macro lens?
3
votes
3answers
171 views

What criteria to consider to match cameras and lenses for shooting people at parties?

I normally don't like shooting people that much, because I like to experiment with settings, lenses etc. to get a result that I like, so it helps when the subject doesn't move (Mountains and buildings ...
6
votes
5answers
2k views

What are the tradeoffs when replacing two zoom lenses with a superzoom?

I have two lens currently for my camera. An AF-S DX VR NIKKOR 18-55mm f/3.5-5.6G (kit lens) and a AF-S DX VR Zoom-NIKKOR 55-200mm f/4-5.6G IF-ED lens. I have found that there are cases when the ...
6
votes
3answers
179 views

How do I rig up a color filter for my Sigma 8-16mm Ultrawide?

I am a bit confused... I'm not sure if the cokin system will work on my lens, as my lens doesn't have threads for a filter. I've found that placing a Z series cokin filter in front of the lens will ...
34
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11answers
11k views

Which focal-length lens is usually used for portrait photography, and why?

What focal length or range of focal lengths are usually used for portraits? What is used by professionals? Why would one select a certain focal length? What are the advantages and disadvantages of ...
2
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6answers
3k views

What is a cheap standard/wide prime lens for Canon APS-C?

50mm f/1.8 is said by many to be a great lens for its price, and one worth buying. On the other hand with a APS-C sensor it is rather long for my taste. Is there some cheap lens around 30mm or below ...
0
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0answers
122 views

How does the Tamron 70-200mm F/2.8 without VR/IS compare to the Nikon 70-300mm F/4.5-5.6 VR?

I'm looking at two different lenses. The Tamron AF 70-200mm f/2.8 Di LD IF Macro Lens. ...
3
votes
1answer
123 views

Diagnose a damaged lens from focus test results

I have a lens that gives perfectly decent results at f/22 and f/32. Here's its capture of an ISO 12233 test chart: It's not the sharpest lens I own, but whaddaya want, it's a quarter century old ...
1
vote
1answer
60 views

Does Pentax make a lens adapter to fit Olympus lenses?

I have some Olympus lenses I found at an estate sale, does Pentax make an adaptor to fit these?
2
votes
1answer
59 views

What is the diameter of my lens? [duplicate]

So recently I bought a used lens - Canon ef 28-80mm f/3.5-5.6 usm with the metal mount but it came with no lens cap and I want to buy one now but I can't see the diameter of the lens on it anywhere ...
8
votes
2answers
1k views

Is it normal for there to be tiny dust particles in a new lens?

I'm the owner of a new Canon 550D with a Canon 18-135mm IS lens. While looking into the lens, I noticed what I think are two tiny dust particles (I would say smaller than 1mm) behind the first glass ...
61
votes
12answers
30k 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 ...
7
votes
10answers
44k views

What should I do about Canon PowerShot “Lens error, restart camera”?

I've had a Canon PowerShot A1100 IS camera for almost a year now. About a week ago, I went on a trip, took pictures the whole trip, everything was ok. When I got home, and tried to turn the camera ...
3
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3answers
779 views

How to fix a Nikon 100mm f/2.8 Series E lens not being properly recognized on a D300?

I have a Nikon 100mm f/2.8 Series E mounted on my D300. When I set the aperture on 2.8 on the lens, it is seen as 1.8 on the D300. At its maximum, when set at f/22 on the lens, it is seen at f/16 on ...
0
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0answers
53 views

Albinar's compatibility with Canon t5

So I have an Albinar ADG 28-80mm lens, that I have acquired, and I was wondering what mount adapter would be required for it to work on either the Canon EOS Rebel T1i or T5, I have both. Thanks!
1
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5answers
1k views

What to gain from using a Nikkor AF-S 85mm f/1.8G instead of a AF-S Nikkor 35mm 1.8G

After debating the old age 50mm vs 35mm, I have opted to go for a 35mm. I have a Nikon D3200 with a Yongnuo Flash, and just acquired a Nikon SB-600. I shoot two things: clubs/nightlife and weddings ...
0
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0answers
32 views

Canon PowerShot SX160 prevent lens opening due to accidental power on?

Just bought my daughter a SX160 as her first real camera and I neglected to check if there was a way to prevent the lens from opening on an accidental power on. My old PS A710 had a slide button for ...
2
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3answers
340 views

Polariser and ND together

I'm an amateur landscape photographer, have some cheap ND filters but I'd like to take it to the next level and invest into more advanced gear. I was thinking of getting a Lee basic kit which I've ...
23
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9answers
2k 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?
3
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2answers
2k views

How good is Sigma 70-300mm F/4-5.6 DG Macro Lens

Planning to buy this lens for my D-90, but not sure how good it is, though i have narrow down my search based on budget constraint. But i have read that it has given good results for wildlife ...
1
vote
2answers
252 views

Does the lens I just bought have a fungus?

I bought a used Sigma lens on ebay for my back up camera and it was said to be in "mint" condition. I got it today and look it out of the box to look at it and I was horrified to see that the front ...
3
votes
2answers
236 views

Nikkor 70-200 2.8 VRII - Does Autofocus <5m really work?

some days ago I daring duck had approached while I was taking photos of her and her friends in a pond. I was testing my new 70-200 2.8 VRII and I was a bit worried about the autofocus while working ...
0
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4answers
279 views

How do I take a “projector output” photo, showing the beam from my car's headlights?

Auto enthusiasts have a thing called a "Projector Output" photo, and its samples are something like this: mostly lights of the cars on a wall at night: And here is a sample shot I did: At full ...
20
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3answers
3k views

Why do wide angle prime lenses have relatively small apertures?

I've noticed that many of the wide angle prime lenses (at least for Canon) have somewhat smaller apertures than their normal or telephoto counterparts. E.g. the regular Canon 24mm prime is f/2.8 while ...
0
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2answers
8k views

So my iPhone 6 camera lens is as wide as my full frame 35mm DSLR lens?

I am trying to understand what is the deal with "full-frame" and what difference it makes, so did a silly test: I sat at my bed and aligned the iPhone 6 camera with the door of the room and took a ...
14
votes
4answers
3k views

Why does a small change in focal length of two lenses make a $1000.00 difference in the price?

I was looking at some lenses and the famous 24-70mm f/2.8G ED AF-S Nikkor Wide Angle Zoom Lens is almost $2000.00. Then, I also found this one: Nikon 28-70mm f/2.8D ED-IF AF-S Zoom Nikkor Lens and ...
1
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4answers
462 views

Which of these lenses should I get for low light conditions?

I'm on a $500 budget and I'm thinking of getting one of these two lenses for low light conditions (e.g. small venue concerts): Sigma 28mm f/1.8 EX DG DF Macro Canon-ef 50mm f/1.4 USM I think I ...
2
votes
4answers
174 views

What should I look for in lenses for long range and close up animal and natural shots?

I am looking at trying to buy a long range lens for shooting animals and nature. I'm kinda new to photography and am not sure which brand or size I should be looking for. What features are important ...
0
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0answers
40 views

what qualities should I be looking for in a long range lens [duplicate]

I am trying to get a long range lens for taking pictures of animals. I have read many questions and realize I need at least a 300 mm and I know they all depend on price...I'm not to go crazy with ...
1
vote
1answer
70 views

General guidelines on choosing a lens for an image sensor [closed]

Not sure if this is the right place to ask this question, but here it is: I am trying to get up and running a VGA image sensor: 2755um x 2050um image area with 4.2um x 4.2um pixels and 640x480 ...
26
votes
10answers
2k 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?
1
vote
0answers
60 views

Where is the focal point of a camera lens? [duplicate]

If the distance between the center of the lens and the film is called Focal length, does that mean the focal point of the camera lens is located on the film?
2
votes
2answers
145 views

Is lens geometric distortion, chromatic aberration and light fall off still as much of an issue? [duplicate]

I saw an earlier question (Why prefer the 18-55mm and 55-250mm lenses vs 18-200mm?) that mentioned lower quality lenses have distortion, aberration and light fall off issues. Has software like Adobe ...
1
vote
2answers
1k views

How do I take good portraits with a bridge camera and superzoom?

I'm an absolute beginner with regards to photography. I did some research on portrait photography today. From what I learned, a long-telephoto lens (70mm-135mm or more focal length (35mm ...
16
votes
2answers
10k views

How iPhone 5S can have such a big aperture? f/2.2?

I thought that in order to have a big aperture such as f/2.2 a big amount of light should be able to enter to the sensor and in order to do it, a big lens was needed. How is it possible that in the ...
3
votes
3answers
9k views

Which is the best version of Helios 44 series 58mm f/2 M42 mount lens

I'm looking to buy a Helios 44 series 58mm f/2 M42 lens for my Nikon D600 and will be mounting it using an M42 to F-mount adapter. I'm primarily buying this lens for portraits due to the interesting ...
2
votes
2answers
456 views

Which lens for a milky way photo

I have a Nikon D7000 and don't know whether my 50mm 1.4 or 17-55m 2.8 lens would be better. I was automatically going to go with the 50mm lens, but then I was reading up on how I can use a longer ...
0
votes
0answers
44 views

Are there any hardshell covers / protectors for lenses?

I'm a concert photographer, and I tend to end up in mosh pits quite a bit. I've mastered the art of shielding my camera from fists and beers, but I have been starting to see some wear and tear. Are ...
3
votes
5answers
7k views

Why my “action” shots are blurry even shooting on AF-C, is this a lens or camera limitation?

I'm currently using a Nikon 28-200mm AF-D with my D7000. While trying to take action shots (e.g. my dog running or sports) none of the shots seem to be in focus even on AF-C mode. Would this be a ...
6
votes
3answers
9k views

Nikkor f/1.8G 35mm or 50mm?

I'm new to photography. I got a Nikon D3100 with the 18-55 kit lens. I was looking to buy a f/1.8 prime lens, and I found two options: AF-S DX NIKKOR 35mm f/1.8G AF-S DX NIKKOR 50mm f/1.8G How ...
5
votes
5answers
7k views

Missing focus with Canon 50mm 1.8 lens - is it the lens or me?

I purchased a Canon EOS 650D and EF 50mm f/1.8 II lens. Unfortunately, the auto-focus seems to miss focus at f/1.8. I've tried setting it to single-point auto-focus: it is better, but still not good ...
13
votes
5answers
11k views

What type of cloth is safe to clean lenses?

Usually, we purchase a camera cleaning kit that comprise a cleaning solution, cleaning brush, cleaning cloth and a air blower. So, I was wondering if we can use other cleaning cloth (such as ...
3
votes
3answers
1k views

What can cause blurry and out of focus images on a Nikon D5300 in no flash mode?

I am using a Nikon D5300 with 18mm-300mm lens. My problem is that the camera is not working properly in "No flash" mode - in all other modes it's working well. Mostly I am using manual settings, but ...
0
votes
0answers
127 views

Samsung NX1000 focus ring does not work, can't get off manual focus mode either

I bought a used Samsung NX1000 last night, everything is great but it's stuck on Manual Focus mode. The Single Auto-Focus [SAF] and Continuous Auto-Focus [CAF] are greyed out no matter what I try. ...
1
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2answers
74 views

D90 and lenses upgrade [closed]

I have a Nikon D90 and currently use the following lenses: Nikon 70-300mm VR Ed IF Nikon 55-200mm DX AFS Nikon 18-55mm DX Sigma 70-300mm APO Macro My question, is the Nikon 55-200mm unnecessary ...
4
votes
2answers
544 views

How durable are zoom lenses?

I've heard that zoom lenses after some intensive usage become "sticky" and difficult to operate. What's the aproximate durability for a zoom lens like a Canon EF-S 18-135, shooting ca. 1000 - 2000 ...