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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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2
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1answer
46 views

Is the Gorillapod sturdy enough for super-zoom lens and long exposure?

I am interested in buying the Gorillapod SLR-Zoom to be used as a travel tripod. My camera is a D3300 together with a 35mm and a super zoom lens (still haven't decided which one to buy, but something ...
0
votes
0answers
24 views

Which of theese 3 lenses should i choose? [on hold]

I'm standing with a dilemma of 3 lenses that i cant choose between: Canon EF-S 17-85mm f/4-5.6 IS USM Canon EF-S 18-55mm f/3.5-5.6 IS STM Canon EF-S 18-135mm f/3.5-5.6 IS STM I have a canon 700D ...
26
votes
2answers
5k views

What is a zone plate?

I was looking into alternative methods of photography and I happened upon something called a 'zone plate.' Three questions: What is a zone plate? How does it work? What can I do with it?
0
votes
1answer
58 views

How can I fix my samsung wb 750 that I dropped on the pavement?

I dropped my samsung wb 750 on pavement. When I turn it on now the lens zooms to the farthest length and comes back in. I tried using a hair dryer to blow sand particles out but it doesn't work. I ...
37
votes
9answers
11k views

Do professionals really never use a 24-70 lens?

I was reading lens reviews on the Rockwell site — mostly because it came up as first result in Google search — and he was saying professionals don't need and don't use mid-range zoom lenses like 24-70 ...
0
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2answers
2k views

How is the quality of the Sigma 18-300 DC Macro lens?

I'm considering the less expensive Sigma 18-300 DC Macro lens vs. the (way) more expensive Nikkor 18-300. Would I be losing the gains by buying a 24 MP Nikon 3200 if I went with the Sigma?
1
vote
1answer
145 views

How do I calculate the maximum aperture at each focal length on a 35-200mm lens

I am looking for the linear maximum aperture of a 35-200mm 3.5/4.5 Nikon manual focus lens. I already know the max & min of the 35 & 200mm it's the 50, 70,105, & 135 that I am interested ...
0
votes
0answers
15 views
0
votes
1answer
58 views

What order to use range extending tubes in and the effect on aperture

I have a 500mm mirror lens, at f/8. I have 2 hollow tubes (their order wont matter) and 1 tube which is a "Vario converter" and can be rotated from 2x to 3x (this moves a lens about 1cm along) I ...
2
votes
6answers
489 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 ...
0
votes
0answers
31 views

Does anyone have any information on Canon's VL mount regardng pinout and protocol?

I currently have a canon cl 8-120mm f/1.4-2.1 lens which uses the VL mount. Canon's goal appeared to have been to make this a standard system similar to the Micro Four Thirds system. See ...
0
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0answers
55 views

Nikon AF Nikkor 80-200mm 4.5-5.6 D : says “Lens not attached” on my Nikon D5100!

I have D5100 and borrowed a Nikon AF Nikkor 80-200mm 4.5-5.6 D lens from my friend. But after mounting it on my D5100 it says "lens not attached", even though the aperture is set to smallest ...
2
votes
3answers
418 views

Why is my Canon 55-250 IS lens blurry at focal ranges beyond 100mm?

I recently purchased a used Canon 55-250mm IS lens and it works nicely at 55mm(even with lower shutter speed, and f/4 aperture), but turns out quite blurry at longer focal lengths, even with a shutter ...
4
votes
5answers
2k views

Does sensor size affect lens distortion?

There was recently a video posted about how different focal lengths affect portrait photography, specifically how distortion at smaller focal lengths have more distortion and are less flattering. So ...
2
votes
1answer
267 views

Nikon 16-85 VR focus noise problem?

My 16-85 VR is doing some weird noise during focus, manual or auto. It's like an hiss. I asked in a local shop and they said it can be some microdust inside the lens. But I'm a little worried it can ...
1
vote
1answer
1k 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 ...
1
vote
2answers
94 views

What is the importance of the back focal length of a lens?

What is the effect and importance of the back focal length of a lens? For instance, if I look at these two lenses by Ricoh, they have the same focal length and aperture, but their back focal lengths ...
4
votes
7answers
571 views

Are there recent entry-level/prosumer DSLR cameras that can use/are compatible with high quality older manual lenses?

A reason to use older lenses is to save money on bigger zoom or other normally expensive auto-focus lenses. Is this still something people do?
5
votes
6answers
876 views

Can I use old filters from SLR film cameras on newer DSLR cameras?

I have access to a vast collection of old filters from 20-30 years ago (for Canon cameras if it makes any difference). Can I use them on new DSLR cameras? I have searched a lot to find an answer for ...
2
votes
5answers
2k views

How can I fix Err 01 with a film-era Sigma lens on a Canon DSLR?

I have a new Canon EOS Kiss camera and a friend of mine has a Sigma Aspherical IF 28-200mm lens she used on an old Canon EOS film camera (old as in 10 years or so). I tried using the lens on my ...
1
vote
3answers
72 views

Will I be able to mount hood over my UV filter?

I have recently bought Canon EOS 600D and I want to buy a UV filter to give extra protection to my EF-S 18-55 IS II. And I additionaly want to buy a lens hood as well. Will I be able to use both ...
3
votes
2answers
1k views

Why are there no full-frame lenses with leaf shutters?

I see that many medium format lenses are made with leaf shutters, which allow much faster flash syncing speeds, so why doesn't anyone put them in FF lenses?
18
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5answers
2k views

How does a circular lens produce rectangular shots?

Is it something like the sensor captures a circular image and then what we get is the cropped version? Something like this: Or did I get it completely wrong?
0
votes
5answers
870 views

Is it typical to experience zoom creep with the Canon EF 24-105mm F/4 L IS USM?

I noticed this more than once. Whenever I'm in the range from 24mm to somewhere between 35mm and 50mm, the lens starts moving if I'm fixing it vertically with its front element facing the ceiling or ...
1
vote
2answers
114 views

Can over-turning the focus ring break the lens?

I was trying to get low key shots in pretty dark conditions and had my Nikon D7000's 18-105mm VR kit lens in manual focus, to try to get the subject in focus in very low light. In the process, I kept ...
2
votes
2answers
190 views

Nikon D3000 70-300 Nikon lens - How to get lens converter off the lens?

I put a Vivitar tele converter on my 70-300 lens. It went on easy but wont come off. How do I get the thing to come off my lens? I have a Nikon D3000 camera.
4
votes
1answer
586 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
1answer
132 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 ...
3
votes
2answers
3k views

How can I do astrophotography with my 70-300mm lens?

I got a Nikon 70-300mm lens as it was on discount. I want to know if I can do astrophotography with it? I want to maximize the use of the lens. I wanted to get a 34-300 mm lens, but it was expensive. ...
3
votes
3answers
469 views

What can I do when autofocus suddenly starts blocking at around 2m on a Nikkor AF-S 28-70mm 1:2.8 D?

I had this lens for quite a few years now, it used to work as expected. I didn't use my stuff for a few months, maybe 6-8 months. I just bought a D600 and tried to use them. The AF does not work as it ...
1
vote
1answer
44 views

Why does Nikon D3100 makes occasionallly noise and viewfinder shifts when pressing shutter button

A Nikon D3100 occasional makes a quiet ka-chunk noise occasionally, when pressing the shutter button. Also, when re-seating the lens or powering the camera up, it will do the same thing 4-5 times in ...
6
votes
2answers
502 views

Is it worth buying cheap lens attachments for my camera?

I'm considering buying a fisheye/wide-angle modifier. The brand-name modifier costs around £150 for a single wide-angle modifier which also requires an adapter ring. I've also seen, on ebay, kits ...
0
votes
3answers
188 views

85mm fast prime vs 70-200mm 2.8 for indoor fashion studio shoots

Why do people shooting fashion inside a controlled environment (studio, when shooting apertures above f/2.8, like f/8, f/11), seem to prefer a 85mm fast prime versus a 70-200 f/2.8 for half and ...
16
votes
3answers
6k views

What is the Nyquist Limit and what is its significance to photographers?

The Nyquist Limit is frequently mentioned in the context of lens and sensor resolution. What is it and what is its significance to photographers? Here is an example of it being used by DPReview.com ...
1
vote
6answers
2k views

Are the 50mm f/1.8 and 75-300mm zoom good lens choices beyond the kit lens for a Rebel T1i?

I own a Canon Rebel T1i with a EFS 18-55mm image-stabilizer lens. Since I want to learn more about photography, my husband purchased for me a EF 50mm and a EF 75-300mm zoom. I am wondering if these ...
1
vote
2answers
110 views

How to accurately calculate size in image using relations and a reference

OK so the relation math is easy enough. If you know the size of an object, say a 12" ruler in the image, and you put the ruler flat against another object like a door. You take a picture of the door ...
0
votes
2answers
180 views

Can Tamron 16-300mm Macro Lens fit to Canon EOS 600D?

I use Canon EOS 600D and I want a lens with a larger range. I found out Tamron 16-300 f/3.5-6.3 Di II VC PZD Macro Lens, I added it into my wishlist. I did some research on it and I'm scared that it ...
4
votes
5answers
695 views

Any help on suitable milkyway lenses

I'm looking at buying a new lens for some night photography out in rural Australia. I'm in the middle of a national park for the next 6 months so light pollution isn't an issue and the skies are too ...
15
votes
4answers
2k views

What is a parfocal lens and how beneficial is it to photography?

I heard someone say that after using a parfocal lens for the first time, they would never switch back. What is a parfocal lens, how is it different from any other lens, and what are the advantages and ...
2
votes
1answer
62 views

5D Autofocus - disable tracking after lock?

I recently got a 5Dmk3 and it's been a really fun toy so far. I'm coming from a Canon 7D, so I'm trying to adjust to the much more complicated autofocus system. I've read the manual and looked around ...
0
votes
5answers
241 views

Is it worth getting a zoom lens which overlaps with lenses I already have?

I want your experience in choosing a new lens. I already have a couple of lenses with focal lengths as follows: 18-55mm, 70-300mm (MF), and 55-300mm (AF) - regardless the 18-55mm. All my zoom ...
0
votes
0answers
37 views

zoom lens for Baseball games [duplicate]

What zoom lens would you recommend for baseball games? I just bought a Canon SL1 and am not sure what lens size would be best. The camera came with the 18-55 zoom lens. I've looked at 55-250 lenses ...
0
votes
1answer
97 views

Nikon 50mm 1.8g vs 1.8d? [duplicate]

What are some pros and cons of each? I use a Nikon D600 and am looking for my 50mm. I shoot a lot of video, so a smooth manual control is important to me. Besides that, I am unsure of what exactly I ...
1
vote
4answers
261 views

What kind of lenses will work with my new Nikon DSLR?

Ok so I just bought Nikon D3200, kinda loving it, kinda not. What kind of lenses do I need for it? What does the lens need to say on it or on the description for it to work properly with this camera?
1
vote
3answers
145 views

How can I get a 12ft wide field of view at 3ft distance?

Is it possible to get 12ft wide image from a 3ft distance? I am a beginner and have very little knowledge on the field of view of cameras. I calculated that a Go Pro would need a lens with 1.5mm ...
2
votes
7answers
913 views

Why are fixed-aperture lenses not more popular?

Lenses come in different varieties: zoom and prime, different focal lengths, different zoom ranges, with and without optical stabilization, and so forth. Why don't we have fixed-aperture lenses for ...
4
votes
1answer
165 views

Why do lens manufacturers produce lenses with few aperture blades?

A lot of lenses have very few aperture blades (especially budget lenses). A large number of aperture blades can make a real difference to the bokeh and seems like it should be a priority for the lens ...
1
vote
2answers
164 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. ...
4
votes
3answers
3k views

What does “R” mean in Fujifilm's XF Fujinon lens names?

Fujifilm currently makes three lenses for their new X-Pro1 mirrorless camera system: Fujinon XF18mmF2 R Fujinon XF35mmF1.4 R Fujinon XF60mmF2.4 R Macro "Fujinon" is Fujifilm's lens division. The ...
10
votes
4answers
12k views

What's the difference between using a 50mm f/1.8G and a 50mm f/1.8D with a Nikon D80?

Recently, Nikon announced their new 50mm f/1.8G lens, as revamp of the old 50mm f/1.8D. Here's how Gizmodo describes the difference: The main difference between this new "nifty fifty" and the ...