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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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14
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4answers
1k views

Why buy an expensive manual focus lens?

What are the benefits of (expensive brand new) manual focus lenses? Why did you, for example, buy a manual focus Carl Zeiss 85/1.4 rather than an auto-focus Nikon 85/1.4? I'm not concerned with ...
7
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2answers
445 views

Why can only certain Canon lenses be fitted with an extender?

Is there a reason only certain lenses can be fitted with an extender? I'd really love to be able to fit the extender to some of my cheaper lenses.
8
votes
2answers
307 views

Examples from the Nikkor Micro 105mm f/2.8 on a full frame camera

This is more of a request than a question. I'm considering getting the aforementioned lens but I'm a bit afraid that it may not allow me to produce as much magnification as I would hope for. That's ...
10
votes
3answers
418 views

Are fast lenses only fast when shot wide open?

Given two lenses with different max apertures but the same size image circle (say, full frame on a Nikon FX DLSR camera) and taking shots at the exact shutter speed and focal length under the same ...
5
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3answers
3k views

How does Canon EF 75-300 f/4-5.6 III USM perform for photographing distant objects?

Does anyone have and could share experiences with the use of? I can buy cheap lens Canon EF 75-300 f/4-5.6 III USM for my Canon EOS 550D What I have found yet is that it hasn't IS and is quite old ...
19
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2answers
1k 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. ...
20
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6answers
1k views

How long should a lens last?

There are loads of ratings and tests for how long DSLR bodies last, but I have never really seen much that describes the expected lifespan of lenses. Recently, one of my cheap-o lenses (Nikon ...
8
votes
2answers
227 views

What do you do to service a lens?

According to this question, proper maintenance & treatment is need to ensure a long lens life. But other than occasional cleaning, I've never done anything to any of my lenses. What else should ...
11
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3answers
2k views

What are M42 prime lenses?

How can I use these prime lenses for Canon T2I? Are these cheap and good? I have no clue what M42 lenses are. Please post appropriate links for the lenses and adapter that I can use for my canon t2i.
12
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8answers
5k views

How do I choose a macro lens for a Canon APS-C camera?

I have a Canon 40D and like taking macro shots sometimes, so I'm thinking of buying a macro lens. I'd also like the lens to double up as a portrait lens. I'm not a super serious photographer, so my ...
34
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5answers
6k views

What should one look for when buying a used lens?

When buying a used lens, what should the buyer check? Other than looking for obvious physical damage on the outside of the lens, what else should be inspected to identify the condition or quality of ...
10
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3answers
3k views

How many optical aberration types are there in lenses? And what are they?

Everyone hears something about chromatic aberration but are there any other types? What causes them?
2
votes
4answers
480 views

Have a Nikon 18-200 VR lens ..want to buy a new lens for super DoF

I have a AF-S DX NIKKOR 18-200mm f/3.5-5.6G ED VR II and am planning to buy this AF NIKKOR 50mm f/1.8D does that make any sense? I'm interested in taking pictures that has lot of DoF. Something ...
4
votes
2answers
290 views

“Classic” lens on new “EVIL” camera body? [closed]

I have a Cannon Rebel XTi. I'm not sure if Cannon has released a series of EVIL (Electronic Viewfinder, Interchangeable Lens) cameras yet, but if not it's inevitable given their comeuppance in the ...
16
votes
6answers
2k views

Which scenarios are better shot with a prime lens versus zoom lens or macro lens?

What scenarios are better shot with a prime lens? A zoom lens? A macro lens?
14
votes
5answers
329 views

Is it possible to adapt lens from one brand into another brand's body?

I'm thinking about buying my first DSLR (I have no experience) and was thinking about the lens brand issue. I'm thinking I should buy a Pentax Kx because of it's cost-effective value, but I'm ...
6
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0answers
368 views

How do I avoid getting any chromatic aberration in my photographs?

Another question is how to correct it (suggested in proposals), but ... are there ways of avoiding it in the first place?