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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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1answer
176 views

What are these green numbers on my Canonet’s aperture scale?

There are three green numbers on my Canonet QL19’s aperture scale: The numbers are 28, 20, and 14. What are those?
7
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4answers
2k views

Do I need other camera lenses if I have an 18-200mm or other super-zoom?

I wanted to ask that once you have purchased a lens of say 18-200mm, then is it required to purchase other lenses — say 24-70mm, 24-105mm, 18-105mm, 28-135mm,etc. Does 18-200mm lens satisfy all the ...
0
votes
2answers
105 views

Which alloys are used in the Canon EF 300mm f/2.8L?

Can anyone confirm that which alloys of magnesium and titanium are used by Canon for the construction of parts in the EF 300mm f/2.8L lens?
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6answers
29k views

How do I find the right size of filters for a lens?

I was looking to get a circular polarizing filter and an UV filter for my Canon 550D, 18-135mm lens. When I checked online I found these filters came in different sizes, like 62mm, 67mm, 72mm, 77mm. ...
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3answers
3k views

Recommended wildlife photography lenses for Nikon DX bodies with no AF motor

I have some SLR experience but have mostly been using a point-and-shoot in the last few years. Now I would like to jump back into the digital SLR world specifically to do wildlife photography (mostly ...
2
votes
2answers
141 views

What is difference between Canon EF-S 18-55 mm IS and EF-S 18-55 mm IS II lenses?

What are physical differences between both to spot on the sight? Other than that, what are technical differences?
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1answer
170 views

Nikon Lens - Stopping down causes over exposure in Aperture Priority mode

I just got a used Nikon 300mm f/4 AF (the older, non-AF-S version), and unmounted, when set to f/4, the aperture blades are still slightly visible (you can push the aperture lever on the lens a bit to ...
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6answers
277 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 ...
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1answer
1k views

Nikon D3200 does not recognize the Nikkor AF-S 50mm 1.8G

I bought a new Nikkor 50mm AF-S 1.8G to add to my Nikon D3200, however, it will not recognize the lens. It says "Lens Not Attached" in all modes with error "NON CPU lenses can only be used in manual ...
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8answers
7k views

Would the 40mm pancake or 50mm prime be better for street photography with a Canon APS-C camera?

I have a Canon EOS 600D, and I already have 18-55mm,55-250mm. I plan to buy a new lens for street photography. I already have picked out one of the following lenses: 40mm STM(pan cake). EF 50mm ...
6
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3answers
5k views

How do I make a package look “heroic and important” in a advertising shoot?

I've been given the following assignment, and unsure what to do with it. An advertising agency has hired you to photograph individual "pack shots" of a range of packet soups. The soups come in ...
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5answers
4k views

Does a “body-only” DSLR need a lens added before use?

What does it mean for a DSLR camera to be described as "body-only"? I found one advertised for sale that was described as such, and I don't know if I'll need to add a lens. I assume that it means ...
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0answers
58 views

Nikon zoom lens troubleshooting

My Nikon D5100 squeals and won't photogragh on its 55-300mm lens beyond 80mm. I've tried turning autofocus on, taken out & reinserted battery, and changed memory cards.
5
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1answer
445 views

Aerial Camera Ground Footprint Calculation

I have a very simple math problem, but I cannot seem to figure it out. I need to calculate what portion of the ground will be visible when viewed from a UAV mounted camera. I believe I have it solved ...
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vote
1answer
58 views

What should I buy? (new body vs. lens) [duplicate]

Right now I have a Nikon D3100, a Sigma 50mm f1.4 (older version). Right now I have almost 1300$. What do you think I should buy? I'm hesitating between the Nikon D7100 or buying a Sigma 35mm f1.4 ...
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5answers
3k views

What is a normal lens?

I've heard people call 50mm lenses "normal lenses". For a lens to be considered normal, does it have to be exactly 50mm or is there some leeway? Does the normal focal length depend on crop factor of ...
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2answers
754 views

What is difference between a 18-55mm and 18-105mm lens? [duplicate]

So what I meant to say is that what exactly is the difference between 18-55mm lens (in general, not specific to any company) and a 18-105mm lens. To me 18-105mm lens looks much better (not considering ...
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0answers
42 views

Beginner Astrophotography [duplicate]

I'm very new to this field and any helpful suggestions would be very much appreciated. I have acquired from a friend a Nikon D7000 and the standard 18-55mm kit lens, but can you suggest a lens or ...
27
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4answers
12k views

What is a macro lens?

I've read a few threads on here that mention some elementary descriptions of macro lenses and found some marketing fluff in the box for my Canon about them as well, but being a complete novice I was ...
2
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1answer
187 views

What are the sales volumes of 50/1.4 and 50/1.8 lenses?

Not a very interesting question in and of itself, but I'd like to get some numbers to use in a following question.
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3answers
397 views

How to fix chromatic aberration with free software?

Here is a zoomed-in example of an image I shot that has a bit of discoloration due to the chromatic aberration of the lens. What's the easiest way to fix this problem using only free software such ...
2
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1answer
80 views

What is the difference between Reversing Ring and Reverse Protect Ring? [duplicate]

I want buy a Macro Reversing Ring for Macro shot but then I can't protect the lens with a filter. Can I use Reverse Protect Ring for lens filter (like UV filer) or lens Cap?
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2answers
185 views

Fungus cleaning from a Nikon superzoom

Happened to be a proud owner of Nikon Coolpix P600 till I discovered that ugly fungus on its lens! Contacted the Nikon India service centre at Kolkata and they said that there is no option of cleaning ...
2
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1answer
101 views

Lightroom: how to insert Lens data to many photos at once?

I'm shooting with a manual Rokinon 8mm Fisheye lens. Photos do not contain data from it, such as aperture and lens maker. Now i'm using the plugin LensTagger to mass batch edit files to add the ...
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2answers
670 views

Why are large zoom ratio constant apertures lenses not generally available?

I know about 17-55 f2.8 and the likes of it, but I am talking about something say 18-135 f2.8. There exists 70-200mm f2.8 and the range (200-70 = 130mm) is much bigger than in 18-135. I am aware of ...
2
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1answer
53 views

Does Sony DT 18-135mm SAM lens has Full-time Manual focus feature

I checked it in Len user-manual but Sony didn't mention about Full-time manual feature. I also checked it on Sony website but I didn't find any resources too. Does anyone know the Len has Full-time ...
4
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1answer
127 views

What do lens distortion data values a, b and c actually mean?

I've recently been looking at lens distortion correction solutions, and I just wonder what the values a, b and c actually mean. (I'm using Hugin/lensfun, I don't know if these are standard values or ...
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2answers
468 views

How do zoom, magnification, and focal length relate?

Zoom lenses and cameras with superzooms are often sold with a times ("×") zoom number — like a 12x zoom or 30x zoom. The question How do I convert lens focal length (mm) to x-times optical zoom? ...
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6answers
4k 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 ...
3
votes
4answers
2k views

Why Isn't This Photograph Pin Sharp?

I Have Been Trying Out My New Canon EF 24-70mm and I'm pretty underwhelmed by its sharpness. Here is a RAW file shot from a solid tripod on an (almost) windless day using a remote. Obviously it ...
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3answers
609 views

What type of lens should I get for an air show?

I went to an air show yesterday, I took a few nice pictures of the Red arrows which is great, but they look so far away, even smaller than by eye. I've got a Nikon D3000 with the kit lens. What type ...
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0answers
107 views

Can I fix a M42 50mm lens myself?

I've been using the Pentacon 50mm f1.8 with pleasure on my Canon 550D with the help of a M42 to EOS adapter. Some weeks ago however the lens housing got damaged in my luggage such that turning the ...
8
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3answers
732 views

What is a pump zoom lens?

While browsing for cheap second hand lenses I found the Cosina 70-210mm f4.5-5.6. The seller notes that it's a pump zoom. Googling the term does yield some results, but these simply state that a ...
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0answers
79 views

Nikon Lens Types. What is AF, AF-S, D, G mean? [duplicate]

What do these lens types denote. I have seen similar questions, but they don't have the answer I'm looking for. I have a Nikon D5200. It does not have a focus motor in the camera, so it relies on the ...
0
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1answer
101 views

What's the best lens for shooting baby's and children? [duplicate]

I have a Nikon D5000 I was wondering what is a good lens for taking baby and children portraits
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3answers
908 views

What's the best bang for your buck to improve low light portrait shots: Lens, Flash or Body?

I want to get better action shots in low light indoor conditions. I've got a Canon T1i (APS-C size) with 3.5-5.6 18-55mm lens, and am thinking about a flash upgrade, a lens upgrade, and/or body ...
2
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3answers
260 views

What is the difference between the Canon EF 14mm f/2.8L USM and 14mm f/2.8L II USM?

Sorry if my question seems a bit naive. I was wondering what is the main difference between the Canon EF 14mm f/2,8 L USM and the Canon EF 14mm f/2,8 L II USM ? And correct me if I'm wrong, but ...
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2answers
218 views

How to lock aperture using Reverse ring with Canon 600D?

Is there anyone using reverse ring and know how to lock the aperture. I tried doing the techniques provided on youtube. First connecting the lens on original positions then lock the aperture by ...
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4answers
328 views

Why does crop factor apply with APS-C lenses, and why aren't these brighter than FF ones at same aperture?

I know that the image circle of FF-lenses is bigger than it needs to be on APS-C sensors, thus the FOV spears narrower. I've heard that APS-C lenses sit closer to the sensor, thus projecting a smaller ...
0
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3answers
643 views

Difference between Minolta MC and MD mounts and can they be used on AF camera?

I am looking at some older lenses for sale. There are a lot of Minolta MC and MD mount lenses out there. Can they be used on an AF mount body at all (as a fully manual lens)? Will either of the MC ...
0
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1answer
295 views

Why is Nikon 13 mm f/5.6 (the Holy Grail) considered extreme?

I happened to see that a copy of the very rare Nikon 13 mm f/5.6 lens was for sale here. Both the design and price tag are pretty extreme. This article seems to suggest that it really is one-of-a-kind ...
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2answers
144 views

Can I get a damaged Canon 70-300mm repaired more cheaply?

I have a Canon EF 70-300mm f/4-5.6 IS USM, due to my own rushing, it fell off the camera to the gravel below. I took it in for an estimate and I was told the "guides" are shot (thus the barrel sags ...
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3answers
2k views

How to know if a Canon lens is compatible with my Nikon camera body?

I am looking at this Canon 50mm lens for my Nikon D5200. How can I be sure that this lens will fit on my Nikon D5200? The camera manual does not have a list of lenses that are compatible with the ...
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3answers
134 views

Is the camouflage texture of certain wildlife lens covers relevant? [closed]

Camouflage texture on wildlife lens covers seem pretty popular. I get that the covers can be great to protect the lens from dents and scratches as well as to protect the hands of thephotographer from ...
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2answers
10k views

What's the difference between a regular lens and a macro lens? [duplicate]

What is the difference between a 100mm lens and 100mm macro, or 50mm and 50mm macro? Can we use a macro lens to shot portraits? If yes, what focal length is the best? Please suggest a Canon macro ...
0
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3answers
206 views

Why can lenses only focus from so close? [duplicate]

I have always wondered, why is it that a lens can only focus from so far away from the subject? I know some lenses have a kind of macro switch which basically allows them to focus closer but why are ...
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11answers
7k views

What is the best lens for taking photos of birds?

I was using a Panasonic Lumix, now I finally got a Canon EOS 60D, but I was used to that 18x zoom that my old camera has, because you can't get too close from the birds to take pictures, since they ...
31
votes
4answers
48k views

What is back-focusing?

What is back-focusing? Is it something I need to be worried about, or can I just live with it? How can I tell if my camera/lens is sufferring from it?
2
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3answers
180 views

How is the number of stops of benefit provided by VR determined?

I hear people talking about vibration reduction giving you extra 'stops' on a lens, thus giving you extra shutter speed to play with. How do people work this out into an amount of stops? E.g. by ...
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3answers
199 views

How do waterproof lenses focus underwater?

Our eyes need air in front of them to be able to focus properly, that's why when we go swimming using goggles, our surroundings are much clearer than without. So my question is, how do waterproof ...