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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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3answers
552 views

Can I fit a Minolta 35mm lens to a Micro 4third mount? [duplicate]

I have old 35mm lenses for my old Minolta camera. I'm going back to photography and getting an Olympus PEN E-PL1 (micro four thirds mount). Can I use my old lenses on such a box or do they become ...
2
votes
2answers
265 views

My lens's focus ring can be twisted past infinity and the close-focus stops without ever hitting a hard stop— is it defective?

I have a AF-S Nikkor 50mm 1:1.8 G lens which I use for my Nikon D3100 and D3300 cameras. Today, I noticed that the focus ring can be twisted past the infinity and 0.45m focus stops. It can be turned ...
1
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1answer
178 views

How do I design a secondary lens for my fixed-lens camera to narrow its field of view?

My goal is to put a lens or an array of lenses in front of my actioncam to use its high resolution for recording of undistorted normal-eyed footage, to avoid having to buy two cameras for the ...
1
vote
1answer
72 views

Sigma 18-35mm f/1.8 rattling sound

Just bought it used and when I shake it it makes a rattling sound. I know lenses with stabilization usually make that sound but this lens hasn't got that. So, is it normal or is something wrong? It ...
29
votes
9answers
59k views

Why does fungus form in lenses, and how to get rid of it?

Recently I was using an old Pentax 50mm f/2 that had a quite big green spot, and later I was informed that it was a fungus. A couple of questions raised from this: Why does fungus form inside the ...
3
votes
2answers
99 views

How do I choose a wide angle lens for my 700D?

I have Canon EOS 700D and want to buy a wide-angle lens. So far I was really impressed by the 10mm ones, however the ones with at least decent aperture comes without Image Stabilization. I also looked ...
3
votes
1answer
66 views

Can I use an M42 mount lens on a Minolta AF body? [duplicate]

I have an M42 mount Helios lens that I want to use on a Minolta AF mount body. I've found this adapter online but wanted to verify it is the correct adapter before I purchased it. The lens is a ...
2
votes
4answers
448 views

Does a full frame lens require more light on a crop body?

When using a full frame lens on a crop body, does the lens require more light? If I use an f/2.8 full frame lens on a crop body, does it become an f/4.2 (*1.5)?
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2answers
103 views

I've chosen to do abstract architectural shots for a portfolio: what type of lens should I buy?

I'm doing a final project at school and I've chosen to do abstract architectural shots, like the works of Andreas Gursky and Carlo Cafferini. I've got a Canon EOS 1100D and would like to buy a lens ...
2
votes
2answers
138 views

Why doesn't autofocus work after using manual focus for a while on my Nikon DSLR?

I bought a Nikon D3200 DSLR with 18-55 and 70-200mm lens. I was taking photos for week in autofocus mode, where I have to press shutter button halfway to focus. And then I switched to manual, where I ...
6
votes
5answers
4k views

Is an EF 50mm f/1.4 the same as 50mm with an EF-S lens on a Canon 550D?

I have a Canon 550D with the standard 18-55mm kit lens. The 550D has a 1.6× crop factor. My question is very simple but whenever I've asked before (Yahoo Answers) I always got overly-complicated ...
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4answers
400 views

How can I learn about the differences between types of lenses, so I can choose the best lens for my purpose?

I'm learning photography and all its elements. Probably this question is really stupid, but I have to ask. I'm not dealing well when the question is equipment and one of the reasons I know this is ...
15
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6answers
28k views

If I have a 18-55mm lens, is there a point in buying a 35mm prime lens?

I have the Nikon kit lens that came with a D5100 — the kit lens is 18-55mm f/3.5-5.6 AF-S DX VR Nikkor Zoom. I was thinking of getting a fast lens and I am looking to buy the Nikon 35mm f/1.8G DX. ...
3
votes
2answers
101 views

Can I use a plano convex cylindrical lens, instead of a fisheye, to shoot 360°x180° panos with my phone?

Is it possible to use a plano convex cylindrical lens (like this) instead of a fisheye lens to make a panorama photo? The idea is that the lens would give you 180° vertical and by turning the camera ...
12
votes
3answers
1k views

How do zoom lenses restrict their widest aperture at the telephoto end?

Does the aperture ring lock the apertures beyond, say 5.6 at length lens's telephoto end? Does the lens introduce an obstacle to the aperture ring so the lens can't be opened anymore beyond the ...
34
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5answers
7k views

How do constant aperture zoom lenses work?

Cheaper zoom lenses usually are faster at the wide end and slower at the long end (for example, the $150 Canon EF-S 18-55mm f/3.5-5.6). More expensive constant-aperture zoom lenses have the same ...
5
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6answers
4k views

Between Nikon 18-55mm II and 50mm f/1.8, which suits my needs better?

I am an absolute beginner in serious photography. I'm a position to get a Nikon D70 body for $100 or so. I've been researching lenses and I'm debating if I should get the one that originally came ...
2
votes
3answers
4k views

What does the built-in AE Chip for Nikon do on a Rokinon lens?

I'm looking at 14mm Rokinon f1.8 lenses for astrophotography. I keep seeing the Built-in AE Chip for Nikon. What does the chip do? I realize I have to use manual focus and actually everything manual. ...
6
votes
1answer
227 views

What prevents a f/1.8, 24 mm - 70 mm or similar range zoom lens from being made? [duplicate]

I see that it is common to have professional grade lenses such as 24-70mm lenses made at f/2.8. After using a 50mm/1.8, I was wondering what would prevent a more versatile zoom lens to be made that ...
14
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5answers
3k views

What camera & lens combination(s) are ideal for animal and bird photography?

I am interested about shooting animals (including, but not limited to, birds and in general animals that can move fast). So far, I would say I know the basic concepts of camera but I have never ...
6
votes
5answers
701 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? ...
7
votes
3answers
125 views

How do I activate the shutter on a Schneider Kreuznach 135/3.5 Xenotar for Linhof?

I can not get the shutter of the Schneider Kreuznach 135/3.5 Xenotar to open. I tried to explain what I know in this picutre: Anyone any idea? I'm afraid I don't have a manual for the lens and ...
4
votes
5answers
431 views

What focal length is used in photos that both model is zoomed in and the background is open

It is easier to explain my question just by a sample photo from Lyndsey Adler: See the models are so big in the photo and still that big RV is also in the image. What focal length do I need for a ...
0
votes
5answers
4k views

What pancake lenses are available for Sony NEX camera?

As a DSLR owner, I am currently looking for a compact interchangeable lens camera and I currently hesitate in buying the Sony NEX-5N or the Panasonic GX1. I realize the lens options for the Micro ...
3
votes
0answers
175 views

Can you use a Krasnogorsk lens (from the 16mm movie camera) on a Sony NEX camera?

I would love to try and adapt the lens from my 16mm camera Krasnagorsk onto my Sony NEX bodies (3 or 5). The lens I am referring to can be seen on this picture, it is a f 1.9 Zoom Lens: I found ...
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0answers
114 views

What can I do if everything with my 55-200mm macro lens is suddenly entirely blurry and the camera won't take pictures?

I have a brand new Nikon D5500. The 55-200mm macro lens is not working properly as far as I can tell. It was acting funny the other day when I was trying to take pictures. The pictures were coming ...
6
votes
4answers
413 views

How is actual focal length greater than focal range of lens?

This image (not shot by me) is shot using 70-300mm f/4.5-5.6 lens, but the EXIF shows the focal length to be 302 mm. How is it possible to be shot at a focal length (302 mm) greater than the ...
16
votes
2answers
495 views

Are there differences between cheap and expensive microfiber lens cloths?

You can find microfiber lens-cleaning cloths on the web for less than $2, or pay $6 for a "Canon" microfiber cloth (or buy at a retail camera store for $15-20). Are all such cloths pretty much the ...
1
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1answer
68 views

What kind of microfibre cloth is the lens-wipe? [closed]

I wish to know what exactly is the microfibre cloth used to wipe lenses. How does one describe this material?
5
votes
6answers
302 views

What do the mm numbers on lenses mean?

I'm confused about lenses and numbers. Why are some lenses ex. 50mm-300mm Different sizes? Some lenses with the same mm numbers are huge and some are small... What's the difference? Also the prices ...
1
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1answer
236 views

Pictures start in focus then go out of focus?

I was recently shooting some surf after a session with my 7d and Tamron 18-270MM F/3.5-6.3 Di II VC PZD. I started shooting while he was in focus, then as he got to the main part of the maneuver the ...
13
votes
4answers
40k views

What is USM, and what are its pros and cons?

My Canon lenses have the designation USM on them, which I assume is for the same reason that they say "Ultrasonic". What does this mean, and why or why do I not want it?
0
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3answers
131 views

Is autofocus important for ultra wide angle lenses?

I want to know if autofocus is important for ultra wide angle lenses, for casual users. I mean, users like my mom. I don't mind about manual focusing, but I suspect that wide angle lenses will focus ...
0
votes
0answers
36 views

What to do when my Nikon AF-S lens won't autofocus? [duplicate]

My Nikon Lens will manually focus but not auto focus. I have tried another lens on my camera body without issues and I have put this lens on another body and it will not auto focus there either. I ...
1
vote
1answer
130 views

Why doesn't my “Nikkor AF” lens autofocus on my Nikon D3300?

I recently got a new lens for my Nikon D3300. I now have 3 lenses; the other two that I have came with the camera and work great but when I put my new lens on, it will only manually focus. If I go to ...
0
votes
2answers
53 views

Why does my camera lens only work with a Polaroid .43x lens? [duplicate]

I got a brand new Canon Rebel T6i and along with it came an ef-s 18-55mm lens, and a Polaroid studio series .43x wide angle lens (which I believe is a telephoto lens). The camera worked fine, but ...
1
vote
0answers
281 views

Why does my Canon 24-70mm L Lens appear to produce higher noise/grain than my 50mm f/1.4 in similar environments?

I just purchased a brand new 24-70mm f2.8 II for my upcoming trip. I've been testing out this lens for the past few days, and have noticed something that I'm a bit confused by. It seems by my tests, ...
1
vote
2answers
84 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?
0
votes
1answer
49 views

Good Photographs with Moto G2 Camera [closed]

I have got a MOTO G2 Mobile with 8MP front camera, usually i get best shot from my phone but is there any way so that i can capture best pictures with a mobile camera everytime?
0
votes
1answer
108 views

How to remove scratches from LG mobile camera lens (with coating)?

I recently bought a used LG G2 (T-mobile) from market and later on noticed that it does not takes the photos with expected quality. Sample Photos (I see a visible difference when I see through ...
1
vote
3answers
104 views

effective 12 megapixel in Nikon kit lens

I have nikon d3300. it have 24.2 mega pixel sensor but some where i read that kit lens have only 12 mega pixel effective but the actual resolution of image is 24MP. My question: 1.what is blocking ...
6
votes
1answer
314 views

What is the defect rate of lenses?

I've read a lot of reviews on sites like photozone.de, the-digital-picture.com and the likes and found that quite a few of their review samples turn out to be defective (including the premium 'L' ...
4
votes
1answer
369 views

What is meant by 'centering quality'?

I'm reading lens reviews and I have encountered the term 'centering quality' a few times (e.g. http://www.photozone.de/sony_nex/720-sony50f18nex?start=1). What does this term mean? What are the ...
6
votes
4answers
3k views

Why is my lens only somewhat sharp near the center and very blurry on the edges?

I bought a canon 50-250mm IS lens (for my T1i), maybe two years ago and haven't used it much, but whenever I do, I always regret using it. Pictures are blurry, the depth of field too shallow and so ...
3
votes
6answers
664 views

Is high Chromatic Abberation typical with the Pentax f/1.8 50mm lens?

I recently bought a Pentax K-50 in a set with two lenses (18-55 & 50-200) as well as a 50mm fixed focal length lens. The camera is great but I am extremly disappointed in the lenses. Two out of ...
2
votes
4answers
951 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 ...
8
votes
3answers
913 views

Using SLR Lenses on DSLR Cameras

I'm just starting out with DLSR photography - I recently purchased a Sony A230 with the kit lens (18mm - 55mm). I know that the lens mount is compatible with Minolta lenses. These lenses were ...
6
votes
2answers
335 views

What to look for when testing a wide angle lens before buying?

I'm looking at buying a used wide angle lens (specifically Canon EF-S 10-22mm f/3.5-4.5 ) for a crop camera. The question What should one look for when buying a used lens? covers the basics when ...
3
votes
6answers
622 views

Is f/4 sufficient for a telephoto lens for outdoor daytime travel photography?

I am new to photography, and currently own a Nikon D3100 with the kit 18-55mm lens. I also own a Nikon 35mm f/1,8G AF-S DX, that I generally use for portraits and in low light conditions. Right now, ...
1
vote
5answers
3k views

Why image at 400mm is LARGER THAN DOUBLE of image at 200mm? (according to lens formula)

Like most of us, I thought it was yes. Until I really look into the Lens Equation: (1/subject distance) + (1/image distance) = (1/focal length) ...