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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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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) ...
16
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3answers
649 views

What is Chromatic Aberration?

What is Chromatic Aberration? Is it a physical part of the lens, or just an optical illusion?
4
votes
3answers
334 views

Is it possible to DIY adjust the focus ring distance scale of a lens?

I have a particular lens in mind, but is it generally possible to do this adjustment? Of course there are a lot of lenses that don't have any distance scale to begin with. Many lenses have the scale ...
21
votes
3answers
2k views

Why am I allowed to turn my focusing ring beyond infinity?

Is there a good reason why I can turn the focusing ring on my lenses beyond infinity mark on focusing scale? Following recent questions here and here, it sounds like a real usability issue. ...
4
votes
4answers
156 views

Which focal length lens generally has the sharpest lens? 24, 35, 50 or 85?

Context I realize that the above four focal lengths lend to having a different perspective that make them all unique. It might be possible to use one as the other but that isn't always true with the ...
0
votes
1answer
97 views

What lens is ideal for graduation and family pictures?

I am currently using a Tamron 17-50 f2.8 for graduation and family pictures, so that many people can fit into the frame, but I find this lens isn't sufficient enough — lack of sharpness around the ...
2
votes
4answers
135 views

How can I fire two cameras simultaneously with different settings but the exact same view?

I have an idea I want to play around with and I was hoping something already exists for it but google has turned up nothing. I want to use two cameras synchronized to fire at the exact same time and ...
0
votes
2answers
125 views

50mm or 35mm lens for a DSLR with 1.6 crop factor? [duplicate]

I have a Canon 500D, with the original lens EF-S 18-55mm f/3.5-5.6 IS II. I would like to try a prime lens, but I don't know whether I should choose a 35mm or 50mm lens. I read that the 50mm was ...
3
votes
4answers
837 views

Should a Nikon 18-55 lens zoom automatically?

I have purchased a Nikon D5000 camera with 18-55 from eBay. The lens focuses automatically, but should the lens also zoom automatically or is this controlled manually by the zoom ring.
14
votes
7answers
41k views

What is the difference between a telephoto lens and a zoom lens?

Looking at the product page for Nikon lenses, I notice a distinction between telephoto lens and zoom lens. What is the difference between the two? Why would I want one over the other? I wiki'd ...
0
votes
0answers
31 views

G-type or D-type? Help Please [duplicate]

I have a Nikon D610. Full Frame. With an in-built focus motor. I plan to go in for a 50mm prime lens by Nikkor. Which one should should I go for, the G-type or the D-type?
15
votes
4answers
23k views

What's the advantage of buying a fixed 50mm f/1.8 lens when my camera has an 18-55mm zoom lens?

I've got a Nikon D3100 with an 18-55mm zoom lens. I'm keen to experiment with some other lenses and a friend of mine recently reccommended I purchase a fixed 50mm f/1.8 lens as he said it's good for ...
1
vote
2answers
158 views

What is the difference between these two differetly-priced Tamron 28-75mm lenses?

I'am getting ready to buy some lenses for basketball and am having trouble finding the difference between these two lenses seeing as one is $390 and the other is $500. 1) - $390 - Tamron AF 28-75mm ...
2
votes
1answer
71 views

Possible to lock focal length on zoom lens? (SELP1650)

(This could turn out to be a bone, practical, product-specific query, but this is the internet so the worst that could happen is a 0 rather than a 1.) Anyhoo: is it possible to lock a zoomable lens ...
0
votes
3answers
78 views

Which lens should I get for a person holding a quilt under fluorescent lighting?

What would be the best lens for my canon T6s for taking a picture of a person holding a quilt average size 90 by 100? The room has fluorescent lighting, and there is very little outside light because ...
0
votes
1answer
28 views

Lens adapter AE1 [duplicate]

My wife has multiple lenses from her old Canon Ae1 film camera with a doubler, I would like to upgrade her to a Canon rebel T5. Is there an adapter available to make use of her old lenses ? If so , ...
4
votes
1answer
5k views

Can I use the lens from Canon AE-1 on a Canon EOS DSLR, with an adaptor maybe?

I have a Canon AE-1 (film) and I bought a digital slr camera Canon EOS 60D. I have lenses from the AE-1 camera, but I don't know if there are some adaptors to use so they fit in the 60D camera... any ...
0
votes
5answers
101 views

Which of these are essential for vacation: tripod, flash, extra batteries and memory cards, prime lens? [closed]

I have the Nikon D3200 with the kit lens (18mm - 55mm). I'm going on a road trip soon and I'd like to take pictures of Christmas lights, Christmas trees, architecture, detail shots and photos inside ...
1
vote
6answers
3k 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
6answers
208 views

50mm 1.8 lens or 35mm 1.8 lens for makeup artist doing close-up face shots of brides?

Trying to decide if i should invest in a 50mm 1.8 or 35mm 1.8 lens for taking before and after shots of my brides. Any advice would be super helpful! I have a Nikon D3200 24.2 MP CMOS Digital SLR ...
8
votes
4answers
1k views

How can I find the right lens cap for my lens?

I own a Nikon D3000 Camera with the AF-S 18-55mm VR Kit Lens. Last week I lost the lens cap and now I want to buy a new one. But when I went to this online store, I got confused with the different ...
1
vote
2answers
104 views

Focal length capacity less than 200mm

I'm an amateur photographer. I take pictures using my Nikon D5200 that comes with two lenses. First one is described as: AF-S Nikkor 18-55mm 1:3.5-5.6G The second one is: AF-S Nikkor 55-300mm ...
2
votes
2answers
4k views

How does the Canon EF 75-300mm USM III compare to the Canon EF 70-300mm USM IS?

The Canon EF 75-300mm USM III lens costs 179$ on Amazon whereas the Canon EF 70-300mm f/4-5.6 IS USM lens costs 500$. Now the differences I see are: The 70-300mm has IS The 70-300mm has 8 diaphragm ...
2
votes
2answers
117 views

Do I need the 18-55mm lens that comes with the camera, or should I instead get a 55-250mm lens?

I'm a novice so don't know whether I need the 18-55mm lens that comes standard with the Canon EOS Rebel T6i or should I instead get the 55-250 mm lens - or both? I'll be using the camera primarily ...
0
votes
1answer
70 views

How farther objects in a scene makes more bokeh? [duplicate]

Why is it that DSLRs makes more bokeh from far objects compared to near ones (Large apertures)? How camera sensor (or lens) function to take this shots? EDIT: My question is different as in the link ...
0
votes
2answers
121 views

How can I remove scratches from a lens?

How can I clean a lens (fisheye) scratches? I heard about peanut butter rubbing alcohol car paint scratch removal solution any other? like an abrasive tool etc
3
votes
3answers
274 views

What to look for in a wide angle lens?

My girlfriend owns a D5100 and I own a D7000 for which we both share lenses (or try to when appropriate). I own the 18-55 kit lens, a Nikkor 50mm 1.8g (I may consider buying the inexpensive 50mm 1.8d ...
22
votes
3answers
4k views

Why do wide angle prime lenses have relatively small apertures?

I've noticed that many of the wide angle prime lenses (at least for Canon) have somewhat smaller apertures than their normal or telephoto counterparts. E.g. the regular Canon 24mm prime is f/2.8 while ...
2
votes
2answers
177 views

How to replace the zoom ring on a Nikon 18-200 lens?

The zoom ring (the rubber-band part) on my Nikon 18-200 is a little stretched out. What is the best way to replace this? I already had to remove the black sticker on the front of the lens when the ...
0
votes
1answer
77 views

What is the difference between the AF-S 50mm f1.8G and the AF 50mm 1.8D? [duplicate]

I am curious to know what is the difference between an AF-S and AF lens. What makes AF-S more costly than AF? Is there any difference in image quality ?
0
votes
2answers
5k views

Does a Canon STM lens autofocus more quickly and accurately on a high-end camera body?

There are incredible reviews on the new Canon STM lenses: https://www.youtube.com/watch?v=ho0hOhRSuHk Does autofocus perform better on a 7D body, compared to an entry-level 700D body, for example? ...
0
votes
1answer
84 views

Focus Issues With L-Series Lens

I have a really frustrating issue with a Canon 24-70 ƒ4 L Series Lens. I noticed that it was unable to focus at or near infinity except at the wide end (when used with my 5D Mk3). When focused ...
0
votes
3answers
176 views

Can I get the same results with Nikon 50mm 1.4D or 1.8D as the 1.4G or 1.8G gives?

I have been searching for a while now and I came to the conclusion that when you fix the aperture ring of Nikon 1.4D lens on lowest stop, then we can change the aperture using command dial, plus the ...
0
votes
1answer
90 views

Is a 50mm or 18-108mm lens most appropriate for a clothing photoshoot?

I am doing a photoshoot of a model wearing clothes for an online store. White backdrop, decent lighting and unfortunately not too much space. I have two lenses to pick from: Nikon fixed 50mm f1.8 or ...
0
votes
2answers
120 views

Effective focal length of kit 16-50mm lens on A6000 (APS-C 1.5x crop factor) [duplicate]

This is likely a tedious question for you guys but, as a camera noob, I'm miffed, so please bear with me. I have a: Sony A6000 (APS-C 1.5x crop sensor). With kit lens: SELP1650 lens (16-50mm) So, ...
4
votes
2answers
249 views

Is the Canon 40mm safe to store when extended?

I just purchased the Canon 40mm pancake lens for my 40D. I noticed that the barrel of the lens extends when focused close. Do I need to be worried about making sure the barrel is retracted before ...
1
vote
3answers
105 views

Is it safe to manual focus with AF ON on Canon L lenses?

On other lenses, this is a dangerous move. Can I move the focus ring, with AF ON with an L lens? I heard that Canon L lenses (and others with an ultrasonic motor) can be in AF ON mode and I can move ...
1
vote
2answers
204 views

Are there lenses f/1 or wider that work on EF or E-mount?

Which lenses have apertures at f/1 or better, and work on cameras like the 6D or A7? In Sony's case, an adapter is acceptable.
2
votes
2answers
2k views

What support system do I use to keep a telephoto lens stable?

At the moment I use Manfrotto 055XPROB Pro Tripod with Photo/Video Pan and Tilt Head 391RC2 to hold Canon EF 100-400mm lens. Even though in most cases this is stable, on the extreme end I do get blur. ...
-1
votes
4answers
113 views

Should I get the Sony Alpha a7r II or a DSLR? [closed]

I've had the camera I have for a few years now (the Nikon d40x) but have been thinking about getting a new camera as the Nikon d40x doesn't have great low light performance. I've been thinking about ...
1
vote
3answers
79 views

What should I look for in a budget macro lens for a Nikon DX camera?

I'm looking to buy a macro lense for my wife, who is an enthusiast/hobby photographer. Her camera body is a D7000, and she has a full suite of lenses other than a dedicated macro. I know nothing about ...
0
votes
2answers
96 views

Which lens for portraits using an APS-C camera? [closed]

I am a portrait photographer and currently am using the 50mm Lens (1.8) for the Canon Rebel t5i. I want to excel in my photography (quality wise) I've been researching about other lenses but Im still ...
39
votes
11answers
15k 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
1answer
145 views

How does the sharpness of telephoto primes compare to telephoto zoom?

Context I've looked at longer primes from Nikon 200mm/2, 400mm/2.8, etc but I've also seen Telezooms such as the Sigma 150-500 and Tamron 150-600. I know that primes are usually sharper than their ...
1
vote
1answer
54 views

If a lens has a 4% Barrel Distortion, what does that mean for images?

I know what barrel distortion is, but how do I take a 4% rating and relate that to an image?
19
votes
13answers
24k views

How does the lens diameter influence photo quality?

I have tested two different 50mm lenses in my camera. One was a Nikkor 50mm ∅52mm. The other one was a Sigma 50mm ∅72mm. I took some pictures with both lenses using the same setup for aperture and ...
0
votes
1answer
75 views

WIll Nikon G and D lenses and (new) Tamron lenses all work with a Nikon D7100?

I am thinking about getting the following: Nikon D7100 DSLR Camera Body Nikon AF-S DX Nikkor 18-55mm f/3.5-5.6G VR Tamron SP AF70-200mm F/2.8 Di LD (IF) Macro Tamron SP AF 90mm f/2.8 Di Macro 1:1 ...
150
votes
3answers
74k 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 ...
0
votes
1answer
208 views

Lens recommendation for landscape photography with Canon 7D Mark II [duplicate]

I am all new to photography and about 3 weeks ago, I bought a Canon 7D Mark II body. Up to now, I have been using a Canon 18-135 STM lens, which I borrowed from my friend. I am thinking about buying ...
1
vote
4answers
599 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 ...