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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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3answers
43 views

Going to Italy - My 7d needs a wide angle lens [duplicate]

I'm headed to Italy on my honeymoon. My current kit (or at least what I'm considering bringing) is as follows: 100L Macro 2.0 18-135 Kit lens Possibly the 50mm 1.8 Now - I was originally going to ...
-3
votes
1answer
63 views

nikkon, sony or cannon [duplicate]

I very new to DSLR Photography. Now I'm in confusion that Sony alpha 58 or Cannon D600. both of them are nearly same cost. but I found that that for Sony there are less lens and accessories. but ...
-3
votes
0answers
47 views

What is the best all around lens for a Canon EOS 70D? [on hold]

In your opinion what is the best all around lens for a Canon EOS 70D? Cheers
0
votes
2answers
28 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 ...
0
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0answers
41 views

What defines camera's size? [duplicate]

Smartphone cameras are small while others are big. I know some functions like zoom can change physical size, etc. So, ignoring a zoom lens, what defines a camera lens? I want to get the general idea ...
1
vote
4answers
236 views

What did the “macro” switch/mode do on older zoom lenses?

I remember that a number of older (80s to maybe mid 90s) zooms had a "macro" mode where you would throw a switch that allowed the lens to focus closer. What was that? was it just a built in extension ...
0
votes
2answers
131 views

Why can lenses only focus from so close?

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 ...
1
vote
1answer
68 views

Lens recommendation for upcoming NYC trip? [duplicate]

I'm just a photo enthusiast knowing just the basics so far. My dad used to work with a film SLR and taught me a few things. I currently own a Canon 60D with the 18-135mm kit lens. I originally wanted ...
4
votes
2answers
128 views

How do zoom, magnification, and focal length relate?

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

Difference between zoom and focal length? [duplicate]

Until now I thought that focal length is just another way of measuring how much a lens zooms: The higher the number the more it magnifies, the smaller the number the wider the angle and thus the less ...
0
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0answers
21 views

Looking for sigma adaptor to canon EOS 550d [duplicate]

Here's the situation.. I'm looking for a sigma lens adapter to a CANON 550D. The lenses are: A Sigma ZOOM, 24-70 mm, 1:3.5-5.6 UC; A Sigma ZOOm, 100-300 mm, 1:4.5-6.7 UC; Minolta AF ZOOM 35-70 mm, ...
6
votes
2answers
212 views

How does an apodization filter improve bokeh?

The new Fujifilm Fujinon XF56mmF1.2 R APD has an "apodization" filter, which Fujifilm says "smoothes the outline of the subject to create a more natural bokeh effect". The Wikipedia article on ...
1
vote
1answer
117 views

Canon lenses with Sony A7r

I am thinking about switching from 5DMIII to Sony A7r. In terms of lenses, I have Canon EF lenses (16-35, 50, 70-200), and a Tamron 24-70 VC. Will the electronics of those lenses work with the ...
2
votes
1answer
90 views

How does a focus ring bring a subject in or out of focus?

When you manually adjust your focus ring on the lens, what actually happens inside the lens? Is this changing simply the point at which the lens is focusing, so that anything at this distance away ...
0
votes
4answers
83 views

Does camera calibration negate lens color quality?

One of the quality of lenses are the way it renders color. Some say, a lens of a certain brand has a special color quality to it etc. But if you do camera calibration, will it matter at that point? ...
0
votes
3answers
103 views

Which lens/focal length offers the widest viewing angle without too noticable distorions/fish-eye-effect?

I am looking for a lens for my Sony Alpha 77 (APS-C), which gets me an as wide as possible viewing angle, but I also hate that fisheye effect one gets from using too low of a focal length. About where ...
3
votes
1answer
155 views

Are wide angle adapters bad?

I would like to get wider angle photos than my current setup of min 18mm APS-C allows, but decent wide angle lenses (for Sony with 10-14mm focal length) cost 300+€. I stumbled upon these wide angle ...
2
votes
2answers
222 views

Is it bad to use old lenses on a new camera?

Ever since I started out with photography, I've been using an old, used Sony Alpha 200 DSLR. I was mostly okay with its mediocre performance, but lately my demands have increased, and I would like ...
7
votes
3answers
367 views

I accidentally refrigerated my lens for a month. Should I be worried?

When preparing for a hike, I ended up putting my whole backpack in the fridge to cool the water in the Camelbak inside of it. The hike was canceled, and I'm the kind of guy that doesn't really care ...
-2
votes
0answers
43 views

Understanding Focal Length of the lenses [duplicate]

What is the Difference between 10x,20x,30x and so on Zoom calculation ratio in mm? Shall I consider 100mm Focal length as 10x,200mm as 20x and so on. If I am wrong in calculation please correct me.
1
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1answer
42 views

Understanding Lenses and the Focal length and Distance of Shooting [duplicate]

Suppose i want to make a Picture of a Tiger,in the National park or in wild life safari,and to fill in the Frame with my Aps-c Eos Camera with Focal Length at 300mm,how close or far i need to ...
0
votes
1answer
69 views

Why does the use of multiple filters create vignetting?

Recently I have had vignetting problem with my Sigma 18-200mm f/3.5-6.3 DC OS HSM (72mm) After checking, it is specified in the manual that one should not use multiple filters or thick filter (as ...
0
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0answers
41 views

Missing Grommet on lens that secures lens cover

I have a Canon Power Shot SX500 IS with a Canon Zoom Lens 30 x IS. The grommet located in the inside lip at end of the lens fell out and was lost. It secures the lens cover when in use. Where can I ...
4
votes
2answers
101 views

Understanding Lenses Focal Length with Converters

I read about APS-C sensors EOS DSLRs, that if the focal length is 300mm and as the image ratio is 1.6 then the 300mm x1.6 = 480mm focal length. So if I add a 1.4x teleconverter to 300mm lens so I ...
9
votes
5answers
2k views

is there a real difference between “digital” and “film” lenses?

I'm looking at the Sigma 20mm F1.8 EX DG ASP RF lens right now to use on a 35mm film Camera (Nikon N80). The DG stands for "Digital Full Frame" according to Sigma, but they don't say what the ...
2
votes
4answers
127 views

Should lenses of equal quality for smaller sensors be cheaper?

In theory do we expect lenses of identical specs and quality to be cheaper when designed for smaller sensors? My expectation is that the answer is yes, because all of the things that lenses struggle ...
0
votes
2answers
260 views

Mounting Sigma 70-300mm 1:4-5.6 APO Macro Super on Nikon D3200

I have been given a Sigma 70-300mm 1:4-5.6 APO Macro Super lens and I want to fit it to my D3200. The problem is that the mount on the bottom of the Sigma lens is too big for the D3200 lens mount and ...
0
votes
3answers
94 views

Can I use my Olympus E-10 lenses on my Canon T3i?

I just bought a Canon Rebel T3i but would like to also use my Wide angle, Micro,Macro and telephoto lenses from my Olympus E-10, Is it just a matter of a step ring from 58mm to 62mm?
0
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0answers
39 views

What kind of chromatic correction has the Pentax M 50mm f/1.7

http://www.kenrockwell.com/pentax/35mm/lenses/50mm-f17-smc-m.htm After the chromatic aberrations that I observe, it could be an achromat.
0
votes
1answer
80 views

Low light when using Macro Reversing Ring

I just purchased Macro Reversing Ring for my Nikon d5100(18-55lens), but I observed that whenevever I try to use it I am getting very dark images, They are so dark that I cannot capture them without ...
0
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1answer
217 views

Which of my lenses to choose for shooting the Milky Way? 17mm 2.8 or 10mm 4.5?

Next week I hope to get a good chance to do my first Milky Way shoot. Last thing I struggle with is which of my lenses to use. I want to avoid startrails. In the final round are: Sigma 17-50 2.8 ...
0
votes
2answers
195 views

Sigma 17-50 f/2.8 or Sigma 17-70 f/2.8-4 (C) for Canon 600D

I know this has been asked alot.. I have Canon 600D with Canon EF-S 18-135mm f/3.5-5.6 and Canon 50mm f/1.8 lenses. I'm looking to upgrade the zoom lens with something with better IQ, sharpness, ...
2
votes
5answers
251 views

High Chromatic Abberation with 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 ...
4
votes
1answer
125 views

Is the distance scale on a lens linear?

I have Nikon lenses with distance scales on them so I can set the lenses to the hyperfocal distance when I need. Say now the focal length is 28mm and the aperture is f/16. The corresponding ...
1
vote
2answers
139 views

Would I get more benefit from buying a new lens to go with a new camera body?

Our family has had a Nikon D70 for years that has seen many holidays and produced lots of good photos. The camera is getting a bit old and unreliable at times, with occasional card issues, and ...
2
votes
1answer
116 views

What do I need to know to select a Nikon-fit macro lens?

I've recently found a passion for macro photography and have purchased a Nikon D3200 which is a great starter DSLR. I have a macro setting on my DSLR and am currently using a VR lens. Will i ...
2
votes
0answers
84 views

How can I fix a Nikon DX 18-135mm with an aperture stuck open?

I am currently on a trip and I brought an 18-135mm lens and a 35mm prime as my two lenses for the trip. When I took my zoom out of my backpack off the plane and put it on my camera, I immediately ...
1
vote
2answers
135 views

Can a Canon 100-400 EF lens with damaged AF be repaired?

Canon 100-400 EF lens Autofocus is damaged due to shake during travel. I can focus Manually, but Auto Focus makes some noise and doesn't focus. I guess, the motor is not functioning. Can this lens ...
0
votes
1answer
73 views

Sony 3.5-5.6/18-55 SAM (SAL1855) lens broken

I have a Sony 3.5-5.6/18-55 SAM (part no. SAL1855) lens that has taken a knock and the zoom ring is now stuck fast at 55mm and the focus ring doesn't want to pull all the way in. Are there any guides ...
0
votes
1answer
32 views

D70 FEE error with aperture ring set and locked [duplicate]

All my lenses which used to work fine on the D70 now give the fEE error. All are locked at the minimum aperture. I have tried cleaning the camera and lens rings, a hard reset, and pushing the DOF ...
1
vote
1answer
119 views

50mm stuck on the body

I have the Canon 600D and the "nifty fifty" 50mm f/1.8 that cost around 100$. One day when I was trying to switch lenses, I pressed on the lens release button, started twisting the 50mm, and around ...
4
votes
2answers
157 views

Perspective Warp vs. Tilt-Shift

I've been doing some architectural photography and indoors with the Nikon 14-24 f2.8 lens. Most of the time I can get my camera high enough to frame my shot and keep vertical lines vertical. But ...
12
votes
5answers
2k views

Camera lens or megapixel value: which defines the quality and clarity of the picture?

I have a 5MP camera in my phone. The pictures shows good clarity both in the phone screen and my computer screen. But one of my friends has a different camera with the same 5MP in his phone (brand is ...
14
votes
1answer
1k views

Can anyone identify the manufacturer of this golden lens?

On a recent photo tour, a lens another photographer used caught my attention because of its golden color and no manufacturer name I know being visible. Unfortunately, I was busy taking some shots ...
0
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0answers
25 views

Sports photography [duplicate]

I own a Nikon D5100. I am 3 steps below a beginner photographer. I bought this camera in hopes of being able to take photos of my family during sporting events; football, wrestling, dance line, ...
0
votes
0answers
54 views

Bayonet mount adapter

I am planning to buy a Vivitar lens with a 58mm bayonet mount. I need to fit it to a 58mm screw fixing. Can I get a adapter to do this? If so, where and what is it called?
5
votes
4answers
1k views

Why are Micro Four Thirds lenses so expensive compared to Canon?

I'm looking at picking up a new prime portrait lens to augment the kit lenses that came with my Olympus OM-D M-10. My brother has a Canon with a 50mm f/1.8 lens that takes beautiful photos and costs ...
0
votes
1answer
78 views

Problems with my lens

Hi i have had a Nikon 200mm lens for about three years now. I did not use it for about six months and when i used it again it was all fuzzy. I have tried everything. Is it because it is so old? I ...
-3
votes
2answers
122 views

Can a shutter booster lens speed up the shortest shutter time on my DSLR?

Is there any shutter speed booster lens available for Nikon 5300. Currently Nikon 5300 supports 1/4000. What if I would like to increase the shutter speed to 1/8000 or more.... Is there any ...
1
vote
1answer
80 views

Nikkor lens for landscape photography day / night [closed]

I'm currently using a Nikon D5200 with a 18-55mm lens and am wanting to get myself a new lens. I'm looking for a really sharp lens that "was built" to shoot landscapes in both good and bad light. ...