Time to be with your loved ones

Time to be with loved ones

by sat

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

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.

learn more… | top users | synonyms (1)

12
votes
6answers
666 views

What lens characteristics contribute to attractive lens flare?

Some lenses give really harsh and unwanted flares. Some gives beautiful flares that add depth to an image. What's the science behind this?
1
vote
3answers
177 views

When a lens and camera are callibrated together, which is changed, and might other lenses be adversely affected?

I wonder what exactly is the calibration of a camera body and a particular lens. I know the effect, but how it is achieved? I recently bought 80-200 (the two-ring version), I was waiting for too ...
8
votes
2answers
256 views

Can we do a refractograph with a lens on?

I just saw this tutorial on how to do refractograph. The tutorial specify that you have to remove the lens to make this work. Do you think it would be possible to do something similar with a lens ...
4
votes
4answers
396 views

Who tells my camera which apertures my lens has

When I mount one of my lenses on my camera, my camera knows which apertures the lens has. So I ask my self: Why does my camera know that for example lens XY has a max. aperture of 2.8 and a min. ...
6
votes
4answers
1k views

Where can I rent a camera and lens online within the US?

I'm considering buying a Canon 5D Mark II camera with Canon EF 24-70mm f/2.8 L USM Lens. But before I buy, I would like to rent it to try it out. Where can I rent camera gear online, and have it ...
8
votes
5answers
314 views

More detail close up at 50mm than further back with at 85mm?

In terms of quality of picture and overall detail of subject (e.g. the face of a child), would it be better to stand closer to shoot at 50mm or stand back at 85mm (assuming the quality of the lens was ...
1
vote
3answers
134 views

Is the Canon 24-105mm f/4 lens weather sealed?

I know most of the Canon L series lenses are weather sealed but is the Canon 24-105mm f/4 L IS USM lens a good lens for shooting in the rain?
2
votes
1answer
2k views

How do I fix a lens with a problem returning to autofocus mode?

I bought a Canon EF 28-105mm f/3.5-4.5 II USM lens for my Canon 350D. It works mostly fine, except after switching from AF to MF, I can't return to AF mode. After I switch MF->AF, the lens doesn't ...
1
vote
2answers
130 views

About the 1.6x crop factor on a crop body [duplicate]

I have a 600D and a 7D and I use the kit lens " EF-S "18-55mm and the 55-250 mm , and I am thinking of buying a 24-105mm f4 IS USM L... so does the EF-S suffer from the same 1.6x crop factor as the ...
1
vote
1answer
202 views

Nikon D3100 Beginner Lens not attached error message

I have a Nikon d3100 with the nikor 18x55 lens. Whenever I attach the lens and turn the camera on it's simply saying "lens not attached". The only time it will take a picture is in manual mode and ...
0
votes
3answers
157 views

How do old lenses get dented just on the filter ring?

I often see old Nikkor lenses for sale that have one deformation on the lens barrel, at the level of the filter. The focusing barrel is intact, the rest of the lens is in good condition, the glass is ...
0
votes
1answer
93 views

Shaky image with soft edges Nikon lens. I dropped the lens

I dropped my 18-105 Nikon kitlens. The image produced after that is like this. Shaky with soft edges. But the focusing mechanism is still running with the regular focusing sound. What could be the ...
1
vote
2answers
154 views

Why is my new Panasonic Lumix 35-100/2.8 lens making strange sounds?

I just bought the Lumix 35-100/2.8 lens. It focuses and zooms fine, but it makes a tiny weird sound all the time, even when not focusing. I have turned the stabilisation system off and switched to ...
3
votes
2answers
155 views

Can you use a EF-S lens on a full frame camera with an extension tube?

Normally, EF-S lenses won't work on full frame cameras since the mirror might hit the lens. But if you move the lens further away from the mirror with say, an extension tube, will it work?
2
votes
4answers
194 views

Starting with photography and seeking help for day-to-day lens

I have just started taking interest in photography and after reading through couple of blogs I decided to purchase Cannon T2i as a beginner camera. It came with 2 lenses 18-55 (I don't remember rest ...
2
votes
2answers
132 views

What would appear on polaroid film exposed without a lens?

I am trying to get a better understanding how lenses & focusing works. Let's say that I am standing in a completely dark room holding a unexposed polaroid film, and turn on a TV in the other ...
3
votes
3answers
403 views

What is the relationship between “macro” and “telephoto” lenses? [duplicate]

Can anyone explain the difference between "macro" and "telephoto"? I know that a macro lens will give you a magnification of 1:1 but how does it differ from a telephoto lens?
1
vote
1answer
111 views

When the batteries are fully discharged, the lens does not get in!

I own Sony HX 300 camera. I have two batteries. In one particular lithium battery, the camera cannot get its lens in when the batteries are fully discharged. On the other hand, the other battery has ...
6
votes
3answers
3k views

What is Nikon's equivalent to the Canon L series EF 24-70 2.8?

I would like a great multi purpose lens that could work of a full frame body. At the moment am tossing between getting the 24-70 2.8 from Canon or selling my gear and moving to a Nikon (since all my ...
13
votes
8answers
14k views

Practical Difference Between Nikon 80-200 f/2.8 and 70-200 f/2.8?

As a photographer for my college's newspaper, most of what I shoot is either low light (concerts, dances, etc.) or sports, so I'm looking into getting a low-light/high speed telephoto zoom for my ...
16
votes
2answers
4k views

What is T-number / T-stop?

Usually, when discussing aperture of a lens, F-stop and F-number are used for quantifying. But some photographers, and especially videographers, also mention T-stop. The concept and numbering used ...
2
votes
1answer
79 views

Thread size and filter diameter

I am trying to buy my husband a gift from photojojo. He has a Canon DSLR. It's the EF-55-250mm. I have found a white balance lens cap that needs a size and the photojojo site says to look for the ...
0
votes
2answers
248 views

How do I convert focal length to maximum distance?

I would like to know whether there is any relation between focal length and distance. For example, what is the max distance I can shoot from a 55mm-300mm lens?
7
votes
2answers
230 views

How do you judge the build quality of a lens?

Some lenses - mostly expensive ones - are consistently praised in reviews for their great build quality, whereas others get very low credit in this regard. To be honest, I cannot tell much of a ...
1
vote
2answers
243 views

What is the Zeiss Planar T* 50mm lens?

I was looking for a 50mm f/1.4 lens for Canon mount. I was looking at the usual options when I came across this one : ...
5
votes
1answer
695 views

What makes the Zeiss Otus 1.4/55 so special?

The new Zeiss Otus 55mm f/1.4 is nearly $4000. With faster lenses from Canon (50mm f/1.2L) with autofocus, why is the zeiss lens more than twice that of the Canon counterpart?
4
votes
1answer
368 views

Why is anamorphic bokeh oval shaped?

I understand that an anamorphic lens "stretches" an image when it is recorded, but when it's played back, it's "un-stretched" so that it looks normal. But with images shot with anamorphic lenses, ...
5
votes
3answers
2k views

How to avoid unflattering facial distortion when using a slightly wide angle lens?

A 35mm prime on a full format body (or 24mm on cropped) is a great lens to walk around with. But when one gets too close to someone to take a picture, invariably some of their features are ...
6
votes
3answers
3k views

How do I make a package look “heroic and important” in a advertising shoot?

I've been given the following assignment, and unsure what to do with it. An advertising agency has hired you to photograph individual "pack shots" of a range of packet soups. The soups come in ...
1
vote
3answers
167 views

I changed my camera lens while my camera was on [duplicate]

I changed my camera lens while it was switched on. It was my first time doing this because I usually switch off my camera and change the lens but this has been the first time I've changed the lens ...
0
votes
3answers
175 views

I'm getting the kit lens; should I add a 55-250mm or 50mm prime lens?

I am planning to buy a Canon 600D with 18-55 Kit lens. This is going to be my first DSLR. I can afford a 55-250 mm IS II Lens ( as Combo Kit ) or a 50mm F/1.8 Prime lens with my budget. Please ...
0
votes
1answer
255 views

Will a “Sigma AF Telephoto 1:5.6 f=400mm Multi-Coated Lens Japan for Canon AF 072” work with Canon EF mount?

Just have a quick question, recently purchased a cheap Canon 1DMK2 but until then I have exclusively used Sony DLSRs so I am not familiar with Canon mounts/lenses. I have been looking on eBay for a ...
0
votes
1answer
203 views

What type of lens do I need to capture the football field or basketball games from the bleachers [duplicate]

I have a Nikon D3000 camera. What kind of lens do I need to capture my grandson on the football field or playing basketball, while I am sitting in the bleachers?
-2
votes
4answers
459 views

What causes blurred/non-sharp images taken of stable objects?

I know about two important reasons which are motioning or shaking camera/hands and dust and dirt on you lens but if you have fixed them and still you have blurred/non-sharp results, what can be the ...
2
votes
2answers
207 views

Can I polish a scratch off of lens contacts?

I have a Canon lens (ultrasonic 17-85mm) and the biggest of the contacts is scratched slighty. It is now showing a connection error. It works only from time to time. Is there a way to polish the ...
1
vote
2answers
172 views

What is the lens on top of the 105mm lens?

Does anyone know what's on top of the AF MICRO 105mm lens? The picture is quoted from a image system set up, trying to figure out what's each part of them. Thanks in advance!
2
votes
3answers
2k views

How do the Samyang and Nikon 85mm portrait lenses compare?

I'm looking to buy a 85mm portrait lens for for my D7000. My budget is around $300-400. I've currently shortlisted the following two lens: Nikon 85mm f/1.8G Samyang AE 85mm f/1.4 (the one with the ...
31
votes
10answers
7k 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 ...
4
votes
5answers
1k views

Why do Canon EF and EF-S lenses exhibit the same crop factor?

I have a Canon 7D, which has a crop factor of 1.6x. When using a Canon EF-S lens I get the focal length stated on the lens, when using a Canon EF lens I get the focal length times 1.6 when used on ...
1
vote
0answers
335 views

Macro shots using Nikon AF-S 55-300mm [duplicate]

I know, it's not a macro (or, in Nikon terms, Micro) lens. But, want to use it that way sometimes. Though, for budget's sake, i was considering a Tamron AF 70-300mm(F/4-5.6 Di LD Macro), but, ended ...
5
votes
2answers
466 views

Why are there no fast APS-C zooms beyond 55mm?

I am looking to add a longer lens to my current zoom (a Tamron 17-50) for my Nikon D300 (but I believe this question is relevant across aps-c lens manufacturers). There is just one currently in ...
12
votes
3answers
18k views

Should I purchase a Tamron 70-300 USD VC or Canon 70-300 USM IS?

Good day all. I was almost decided on Canon 70-300 USM IS (non L) but recently came to know about the Tamron version (SP AF 70-300 F/4-5.6 Di VC USD) of this one. Neither of these makes you a better ...
1
vote
1answer
140 views

Does the Nikon 50mm 1.8G have a rubber seal?

I have the 1.8D already and I know it doesn't have a seal. I am wondering of the G does because if so I might replace the D with a G so I can be better assured if I take my camera on holiday ...
2
votes
2answers
179 views

Can an Optical Low Pass Filter be applied via a lens filter?

I constantly see references to video being the application where an Optical Low Pass Filter is most useful, but it seems that still images do best without one. Would it be possible to then have a ...
1
vote
4answers
754 views

Should I replace the Canon 18-55mm f/3.5-5.6 kit lens with a 40mm f/2.8 or 50mm f/1.4?

So I'm about to buy my first DSLR (definitely a Canon, probably the 700D) and my original plan was to buy the one with the included 18-55mm f/3.5-5.6 kit lens. At the same time I was thinking about ...
13
votes
3answers
790 views

Could my lens be damaged after being used as burning glass?

During a nice nature trip, sitting at a table with a bottle of wine, somehow we had the ridiculous idea to test a lens as burning glass (which performed quite well). After we went home I started ...
2
votes
2answers
166 views

Why does oil leak from the aperture ring of old lenses?

I'm assuming that the oil was there initially to lubricate the aperture blades, but why does it leak out?
18
votes
5answers
657 views

Why do two lenses with the same F-number give different amount of light?

Why do the following two lenses provide different amount of light? In both images we have fixed focusing distance, distance to the object, ISO, shutter speed and F-number.
4
votes
2answers
100 views

Does Stopping down affect the performance of the sensor's AA filter?

I noticed a while back that with a lens stopped right down (say f16-22), any dust on the sensor becomes much more noticeable and "focused", and wide open (say f1.4) it is practically invisible. This ...
1
vote
2answers
220 views

Help me understand effective f-number

If I set a lens to, say, f/2 but my focus is set to its closest point, my effective f-number won't be f/2 any more but it will be higher by a factor that depends on focal length, image magnification ...