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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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2answers
141 views

Whatever happened to dust?

Back in the day, lens cleaning was a front and center concern, with everyone discussing their preferred methods and products. I had a blower brush, tissues, and fluid as part of my kit. But now, ...
-2
votes
0answers
77 views

Super clear images when zooming in [on hold]

enter link description hereI would like to know how to get SUPER clear images indoors. My photos look good overall but when you zoom in they're not crystal clear. The photo I attached was taken by a ...
0
votes
1answer
52 views

Rodenstock XR-Heligon 50mm 0.75 Lens

I found this crazy lens on ebay: Rodenstock XR-Heligon 50mm 0.75 Lens (here an example: ...
5
votes
1answer
323 views

Why doesn't exposure change when changing focal length?

With a Canon 550D camera and a Tamron 18-270 mm zoom lens, I tried to fix shutter time, aperture (f/8.0 to cover all zoom range), and ISO, so the exposure meter read 0.0 with 18 mm focal length and ...
3
votes
1answer
219 views

Why isn't the size of an object in macro image exactly proportional to the ratio of the focal length and distance in front of that?

Using a Canon 550D with a EF 100mm f/2.8 Macro USM lens, I can make a 1:1 macro photo at shortest film plane to subject distance of 310 mm, thus getting 22 mm of a scale on the APS-C sensor, which is ...
5
votes
1answer
197 views

Does Lightroom take sensor size into account when applying lens correction profiles?

I have a question about using the lightroom lens correction profiles for cameras other than full frame. I have been using a Tamron 24-70 which is known for having slight vignetting (full frame only) ...
0
votes
2answers
108 views

What are some tips to keep a lens from rolling on its side when kept horizontally on a table?

Assuming we don't prefer to keep the lens vertically when not attached to a camera. I'm broadly referring to adding some sort of an attachment to keep it from rolling and falling of a table. Or any ...
0
votes
2answers
105 views

Lens Adapters For Point and Shoot Cameras?

I have an old Kodak DX7590 and I was wondering if there were any lens adapters that would work with it to turn it into a mediocre DSLR
0
votes
6answers
2k views

Choosing between Lenses Canon 70-200 f2.8L IS II vs Canon EF 70-300mm f/4-5.6L IS USM

I am considering between these 2 telephoto lenses but I cannot make up my mind on which one to buy. I have read a lot about the pro's and con's of both these lenses.. For example 70-200 f2.8 IS II ...
0
votes
0answers
33 views

Technical book or resource (non-creative) [duplicate]

I'd like a resource from which to learn about technical, non-artistic/technique aspects, such as: Onion ring bokeh, and what causes it. Choosing of lens hoods, Why chromatic aberration happens/why ...
10
votes
4answers
1k views

Is there a correct way to swap lenses?

I am regularly swap between a telephoto and a kit lens on my Olympus 500. Normally I just switch over the covers and cap to the non-use lens and drop it in my bag but today it was particularly ...
3
votes
4answers
677 views

Would a 85mm lens have allowed me to blur the background better in this photo of a DJ in action?

This is the picture I took: I had a Nikon-D610 and a 24-70mm f 2.8 lens on it and I used it on Manual mode and metering was f:2.8, Shutter speed: 1/20 sec and Focal length: 62mm. Also I was as ...
19
votes
6answers
1k views

How do photographers manage multiple lenses?

This is probably a very naive question but I will ask anyway. It appears that most photographers carry multiple lenses. Each lens serves a different purpose. I understand that. However, I can't ...
35
votes
9answers
6k views

What are the dangers of removing a lens while the camera is on?

The manual warns that you should turn the camera off to remove the lens, but it doesn't say why. I suspect this may have to do with dust, but I could imagine there are lots of other reasons. I'm ...
11
votes
3answers
2k views

Is it risky to change lenses in the cold?

I am generally a lazy person, so I am extremely averse to changing lenses on my camera in the cold. I am concerned about my fingers getting cold, but here I read that condensation is extremely ...
4
votes
3answers
1k views

How do I avoid dust entering my camera when changing lenses?

Akin to Should I be worried about getting dust inside my SLR? and What should I do to avoid switching lenses?, I have a certain paranoia of dust/debris entering my camera when changing lenses. Are ...
3
votes
2answers
248 views

lens care: compressing lens without full-time manual focus when camera is off?

The lens manuals for my lenses without "full-time manual focusing" warn not to use the focusing ring when it's in Auto-Focus mode. I assume that even applies when the camera is off, but am I being ...
6
votes
1answer
119 views

How is Nikon's PF optics different from and similar to Canon's DO optics?

Nikon has just announced a new 300 mm lens featuring a new technology called "PF" or "Phase Fresnel." This has been compared to Canon's existing DO (Diffractive Optics) lenses such as the 400 mm f4 ...
4
votes
3answers
10k views

What mm lens for distance shots?

If I am looking to take landscape and wildlife shots and some of those shots being from a decent distance what mm lens would I need? I am not sure what else I should be adding here, I am just looking ...
0
votes
2answers
148 views

Wide Angle Lens recommendation for canon 70D (cropped sensor camera)

I am interested in landscape and have a 40mm f/2.8 pancake lens but finding it does not capture enough and would like to purchase a Wide Angle lens. I am find ing the prices for the Canons too much ...
127
votes
3answers
47k views

What do all those cryptic number and letter codes in a lens name mean?

Then looking at a lens name there is a lot of acronyms in the name describing it's features (often specific to the manufacturer). Examples, Nikon: Nikon AF-S DX 16-85mm VR f/3.5-5.6G IF-ED Nikon ...
-1
votes
2answers
124 views

What does f/4.5-5.6G stand for on a Nikon Lens? [duplicate]

Can you please explain me what is 4.5 - 5.6G in a lense description.And how it is different from other generation of like 3.5G or 6.5. "Nikon AF-S DX NIKKOR 55 - 300 mm f/4.5-5.6G ED VR Lens"
0
votes
0answers
126 views

Are mobile phone camera lenses good enough to support 20MP sensors?

With mobile phone cameras approaching 20 MP while maintaining small sensor sizes, pixels dimensions are typically around 1 μm or lower. What about the lenses? Are they good enough to produce an Airy ...
2
votes
4answers
997 views

35mm vs 40mm: Does it matter?

I want to buy the lens Voigtlander Nokton 40mm F1.4, $449 Voigtlander Nokton 35mm F1.4, $629 I am asking, why the slightly difference in focal length, the price difference in so much as $180? ...
1
vote
4answers
355 views

What low-cost non-fisheye wide angle lenses are available for Canon and how do they compare?

I'm currently looking for a wide angle lens for my Canon T3i. I would prefer a prime lens. I want to use a wide angle lens primarily for video (so the lens needs a quiet AF motor) but for still ...
1
vote
4answers
538 views

Is the camera sensor or the lens the limit to resolution?

I have a pretty high res sensor on my camera, but sometimes I have the feeling my lens doesn't even get to this resolution. How can I tell if my camera sensor has not enough resolution or if the lens ...
2
votes
3answers
246 views

Why is my zoom lens blurry at focal range past 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 ...
0
votes
0answers
48 views

Can I use old Pentax-mount Vivitar lenses on Nikon DSLR? [duplicate]

I have some old Vivitar lenses (some still Boxed) that bear the marking PK-A/R and PK that I used on my old Pentax K mount SLR. Can I use them with my Nikon D5100 DSLR with a K to Nikon adapter? I ...
0
votes
0answers
97 views

Converter and lens combination to try on sony a7 or a6000

I have bought an a6000 with the kit lens, and it takes nice pictures but I miss some things that I was able to do with my Canon DSLR and old lenses. I have kept some of my Canon lenses. Should I buy ...
1
vote
1answer
79 views

Blurred corner problem

Nikkor 18-105 VR lens. What could cause such blurry left bottom corner? Is there anything more that I can do to diagnose problem? I have already tried the lens on different body with same result. ...
8
votes
2answers
440 views

Does lens age affect color produced?

I came into some discussion with my friend, and my friend said that age may affect the color produced by the lens, i.e., a newer lens produce better color than an old lens (of the same model). Is this ...
2
votes
1answer
211 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 ...
2
votes
3answers
117 views

Which EXIF tag to set for the 35mm equivalent focal length?

For a manual lens (*Rokinon 8mm f/3.5 Fisheye) I want to add the focal length information to the EXIF metadata in the resulting pictures with exiftool. I use the lens on a Canon 60D body. Obviously I ...
0
votes
0answers
134 views

35mm Loxia vs Sonnar, IQ Comparison

How do the Sony Zeiss Sonnar 35mm f/2.8 and Zeiss Loxia 35mm f/2 lenses compare on the Sony a7 series cameras? (I am interested more with image quality than ergonomics, build quality, price, etc.) I ...
0
votes
1answer
137 views

Does the Canon EF-S 24mm f/2.8 STM Lens offer any significant advantage over the Canon 18-55mm IS II at a 24mm focal length?

Does the Canon EF-S 24mm f/2.8 STM Lens offer any significant advantage over the Canon 18-55mm IS II at a 24mm focal length (the kit lens for my T3i)? I'm looking for a cheap lens that offers a wide ...
2
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 ...
0
votes
2answers
98 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
200 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
119 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
88 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
votes
1answer
800 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
159 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
168 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 ...
4
votes
1answer
252 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 ...
2
votes
2answers
102 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.
3
votes
3answers
408 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 ...
34
votes
11answers
9k 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
votes
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
votes
0answers
67 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. ...