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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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6
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4answers
624 views

Are there any pinhole “lenses” available from lens manufacturers?

I know that it is possible to make your own pinhole, but do lens manufacturer's make pinhole "lenses" that include aperture data, etc? If so, who makes them?
13
votes
2answers
1k views

Retrofocus lens? What's that?

I saw that in Why do some people prefer 50mm to 35mm prime lenses? , in @MattGrum's answer: ... The 50mm is a simpler design compared to the retrofocus 35mm ... What's retrofocus?
6
votes
2answers
1k views

Any reason to buy stock lens for Sony Alpha if I already have good Minolta Maxxum lenses?

I am a novice photographer looking to get into DSLR photography. I have an old Maxxum 5 and a couple lenses for it: a 75-300 zoom and a 28-80 zoom. After reading this question, it is clear that ...
1
vote
1answer
285 views

Sigma 17-70mm f/2.8-4 OS HSM over Canon EF-S 18-55mm f/3.5-5.6 IS II

I own the Canon lens (on a 400D camera). Rather satisfied, but it is not an inspiring lens. I refer most of all to image quality. I know Sigma has some more focal length and it is a good thing ...
4
votes
2answers
293 views

Canon 50mm F1.8 quality

I recently bought 50mm f1.8 lens online, and quality is very poor as described in most of the reviews. But when i shake it gently I can feel some of the parts moving inside. And when ever I slide the ...
3
votes
1answer
654 views

How do I get a decent zoom lens for my Micro 4/3 camera?

I recently bought my first “real” camera, an older Lumix GF-1 with a pancake 14mm/2.5 lens. (I love it, here’s some samples.) I wanted to try a zoom lens, so I bought a second-hand 14–42/3.5–5.6. ...
6
votes
1answer
279 views

Can anyone help identifying this lens?

I bought a Nikon FG today, with 2 lenses and a load of accessories. One of the two lenses is kind of a mystery, as there's no manufacturer name on it. I'm trying to figure out who's the manufacturer, ...
0
votes
4answers
564 views

What do I need to take better landscapes and low light sports photos?

I have a Nikon D5000, and Nikon 70-300mm VR Nikon 18-55mm lenses. I am looking to improve my basketball, soccer, football, and baseball photos, and also scenery photos. My pictures in a gym or low ...
-4
votes
3answers
297 views

What lenses could I get for EOS 60D beyond the kit? [closed]

I have just bought the EOS 60D and I am thinking to buy some new lenses. What are the next best lenses to buy to get more detail in my pictures and do they have to be EF-S lenses (like the kit lens ...
3
votes
2answers
1k views

Nikon 50mm FX as general-purpose lens on DX?

I have a Nikon D5100 with the excellent 35mm 1.8 (DX) prime lens and am now looking at the 50mm 1.4 (FX). This is (according to my research) a 75mm equivalent on a DX body. Does anyone else have ...
6
votes
1answer
521 views

What are the differences between Pentax weather sealings - DA★, WR, AW?

Pentax has in current product line weather-sealed lenses with three different markings - DA★ on primes and fast zooms; WR on consumer zooms and 100mm macro; AW on some newer primes. What are the ...
5
votes
2answers
104 views

Does “the same” lens, with different autofocus systems, have the same optical quality?

I'll give examples with Nikon only, but the question is pretty general. So, is this a fact or not? Examples: Nikkor 50/1.8G AF-S, Nikkor 50/1.8 AF-D and Nikkor 50/1.8 AF 70-300 AF and 70-300 AF-S ...
3
votes
1answer
1k views

lens math: focal length vs distance to subject?

I have found this illustration that shows how the framing of a subject varies at different focal lengths. At first glance, 10mm vs 17mm is quite a big difference. But then again, it seems like the ...
6
votes
3answers
4k views

Why is the 18 - 200 mm lens so expensive compared to equivalent alternatives?

I have been looking at various lenses and I found that that the 18-200 mm lens is pretty expensive (be it Canon or Nikon) when compared to the combination of the lenses 18-55 & 55-200. Is there ...
2
votes
1answer
1k views

nikon 70-300 f4.5-5.6 vr problem

I got this lens second hand from eBay; it was in perfect condition, but recently when I zoom in to between 135 and 200mm it makes a grinding noise and shakes.
-5
votes
3answers
460 views

Comparison between acquiring the Canon EF-S 17-55mm f/2.8 IS or EF-S 24-70mm f/2.8 lenses

I'm thinking of getting either the Canon EF-S 17-55mm f/2.8 IS or EF-S 24-70mm f/2.8L lens. What are the main similarities and differences between these two lenses, and what are their relative ...
7
votes
3answers
2k views

Is the Canon EF 35-105 lens compatible with Canon T2i body?

I recently upgraded to a T2i from the original Digital Rebel. I usually used the Canon EF 35-105 lens on the old Rebel. When I put that lens on the T2i after about 5 seconds everything goes off on ...
2
votes
2answers
402 views

Why is my lens focusing sound lounder than before?

I'm new to DSLR camera. I didn't mount a lens properly. The camera still allowed me to take photos, so I didn't notice the error. After I had been using it for 10 minutes I noticed my error and ...
4
votes
3answers
806 views

Why are there no autofocus tilt-shift lenses? or, why do tilt-shift movements appear to be incompatible with phase-detection autofocus?

I have never seen or heard of an autofocus tilt-shift (perspective control) lens. It seems like perspective control movements prevent phase-detection autofocus from working correctly; for example ...
1
vote
1answer
310 views

Which of the following lenses do fit on a Nikon D 3100

I've been given the following lenses from my neighbour; which ones will fit a Nikon D3100? Sigma 28-200 mm F F3,8 - 5,6 Nikon Af 70-210mm F/4,0-5,6 Nikon Af 28-85mm F/3,5-4.5 Nikon 50 mm F 1.4 Nikon ...
9
votes
3answers
653 views

Why are 50mm Lenses Cheaper?

There is no doubt that 50mm lenses, if all other variables are held equal, will beat any other lens when it comes to value for price (lower f/number). I want to know why. Possible theories I have ...
6
votes
1answer
188 views

K800i 5.2 mm lens equivalent

I really like the pictures my Sony K800i with its 5.2mm lens takes and I use its lofi quality to creative effect and woud like to know the 35 mm lens equivalent to this little piece of plastic. I ...
3
votes
3answers
603 views

7D or D700 for hockey?

I hate to be THAT GUY that starts another comparison thread, especially one that may really seem like comparing apples and oranges and has probably already been answered somewhere, but all the ...
-4
votes
3answers
4k views

Are Nikon lens double the cost of Canon auto-focus lens?

Are Nikon lenses double the cost of canon Camera? Point in case, below. I am an amateur photographer and my usual requirements are: Portraits with nice Bokeh Macro (flowers, insects etc.) Day ...
2
votes
0answers
83 views

How Focal Lengths is related to Sensor Size? [duplicate]

Possible Duplicate: What is the difference between focal length and crop factor? I was watching a video review of Tamron 70-300 lens where he mentioned that effective Focal length for a ...
7
votes
4answers
42k views

How do I decide between the Canon 55-250mm or 70-300mm + 50mm?

I just bought a Canon Rebel T2i (EOS550D/Kissx4) with 18-55mm kit-lens and I have an additional $300 USD to spend on a lens. I had decided to buy a Canon EF-S 75-300mm f/4-5.6 (without IS) and a Canon ...
5
votes
2answers
976 views

Focus ring stuck on Canon 17-85mm lens

I have a Canon EF-S 17-85mm f/4-5.6 IS USM lens on which the focus ring is stuck/jammed. Is this something I could easily repair myself? If so, are there any detailed instructions on-line on how to ...
4
votes
1answer
3k views

Nikon 24-70 versus 35-70 Image Quality and Sharpness (only)

I am planning to buy a 24-70 but I saw a second hand 35-70 AF in a store nearby, I did some research and again, I stumbled upon Ken Rockwell's 35-70 review, in which he states: This 35-70mm f/2.8 ...
15
votes
7answers
8k views

Is a UV filter better for lens protection than a protector filter?

I'm usually very good at getting water/finger marks on lens, so I must use something for protection. Is there any downside of using an UV filter instead of a protector filter? Example: Hoya HD ...
3
votes
3answers
706 views

Upgrade from EF-S 15-85 IS

I currently own a Canon 60D, and I am perfectly happy with the camera. It is going to be years until I move to a better (most likely full-frame) body. My main, walk-around lens is the 15-85. I am ...
7
votes
2answers
2k views

Canon 50mm f/1.8 vs Canon 28mm f/1.8 (vs Sigma 30mm f/1.4)

I have the nifty-fifty and I am in love with the kinds of images it can produce, particularly when it comes to portraits. I really enjoy the lens, but I have one problem; it is a little bit too tight ...
4
votes
5answers
930 views

How to protect surface of lens or filter from condensation of moisture

This happens when the temperature is coolest often late at night or early in the morning. Few days ago I did night shots and every 4-5 minutes I had to clean filter from water (mist). Is there any ...
11
votes
8answers
2k views

Can a sharp picture with a kit lens plus post processing rival a “pro” lens?

If I am able to take a relatively sharp picture with a kit lens, and boost the vibrance and or saturation during post processing, will that picture be comparable to ones taken from an expensive ...
1
vote
2answers
571 views

Pentax DA L 55-300mm lens very soft--is it broken?

There seems to be a problem with my DA L 55-300mm lens, with very soft output at or near the telephoto end: Wide-open test shot Pentax K-5 with Pentax DA L 55-300mm @ 300mm. Av, 1/320s f/5.8 ISO ...
1
vote
1answer
1k views

What are screw drive lenses?

Are lenses known as screw drivers actually available?If so what are their features and why are they called so.Name some of the lens and their manufactures.
4
votes
1answer
1k views

Is the Quality Inconsistent on the Canon 24-70mm f/2.8 L MkI lens?

I'm considering buying a Canon 24-70 L Mk I. There is one thing that scares me a bit, though: reading reviews around the intertubes it appears that a fair number of people had to send their copy back ...
5
votes
3answers
8k views

Nikkor f/1.8G 35mm or 50mm?

I'm new to photography. I got Nikon D3100 with 18-55 KIT. I was looking to buy 1.8f prime lens. I found two options. AF-S DX NIKKOR 35mm f/1.8G and AF-S DX NIKKOR 55mm f/1.8G Which one you guys ...
0
votes
0answers
112 views

What is the significance of a 50mm lense? [duplicate]

Possible Duplicate: Why is the 50mm prime lens the most standard? Why do people recommend 50mm or other prime lenses as starting lenses for learning photography? I'm a completely amatuer ...
2
votes
2answers
993 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 stable, on the extreme end I do get blur. At ...
2
votes
3answers
780 views

Tips to buy second lens for Canon 550D

I recently had brought Canon 550D - My first (D)SLR - with the kit lens. I want to buy an additional lens for use both indoors and outdoors, but I'm confused about what type or focal-length I should ...
3
votes
2answers
826 views

Suitable lenses - Canon 5D Mark II

I have recently purchased a Canon 5D Mark II, which is quite a step up from my previous 450D. I am hoping to purchase some lenses that would be most versatile primarily for travelling photography ...
8
votes
4answers
893 views

How do I eliminate lens flare in my pictures?

I have taken a few pictures that show these circles, and I'm getting very annoyed at this problem. Seems most common on sunny days. This particular picture is not my own, but it is a good example of ...
2
votes
5answers
984 views

Is the Nikkor “AF-S 35mm f1.8G DX” as close to a 50mm as I can get on the Nikon D5100

I have a Nikon D5100 and would like a standard 50mm lens. Considering the Nikon 1.5 crop factor, Is the Nikkor 35mm DX as close to a effective 50mm as I can get with this camera?
-1
votes
1answer
353 views

Below which focal length are lenses considered to be wide angle?

Focal length is the only factor that decides whether a lens is described as being normal or wide angle. Below which focal length are lenses considered to be wide angle? Is this focal length the same ...
2
votes
2answers
470 views

What results to expect from a Hasselblad Carl Zeiss 50mm 4f on a Nikon adaptor

Having just acquired an old 'blad + lens (Zeiss Distagon 4/50 T*), I noticed that there are a number of adaptors available to fit the lens onto Nikon DSLRs. Has anyone any experience doing this? Is ...
21
votes
14answers
19k views

How do I get a stuck screw filter off of my lens?

There is a UV-filter screwed on my Canon 16-35mm. For some reason, I'm not able to get it off the lens. Does anyone has a simple but safe trick?
14
votes
5answers
14k views

Are mirror lenses good for wildlife photography in daylight?

I've recently seen these Rokinon/Opteka mirror lens with whooping focal length (like 500mm, 600mm, 800mm, 1000mm) at a cheap price. And I have seen some of their same pictures in Flickr and vendor ...
5
votes
1answer
147 views

How can you tell if a Nikkor lens is an FX lens?

How can you tell if a Nikkor lens is an FX lens? I assume if DX is not in the nomenclature that it must be an FX lens. Is that correct?
-1
votes
2answers
333 views

Lens recommendations for a D800 [closed]

I recently bought a Nikon D800, and was wondering if you guys could give me lens recommendations to take advantage of its sharpness. I already have a micro 105 and the excellent 16-35. I'm looking for ...
0
votes
0answers
55 views

What to look (out) for when buying a second hand lens [duplicate]

Possible Duplicate: What should one look for when buying a used lens? I'm fairly new to photography, so I'm not really familiar with all the details and pitfalls and what not. Now I'm ...