Tagged Questions
1
vote
2answers
90 views
How do I choose among the following lens of 55-250 IS, 70-300 IS and VS 75-300?
Sorry by this specific question, but I'm pretty crazy here looking for a difference.
I've got to buy a lens tomorrow (I leave my country in 2 days)
I could see the difference between 55-250 and ...
4
votes
3answers
184 views
How do they come up with focal lengths for lenses?
There are a lots of lenses for each camera and I understand that each lens caters to a different use case but my question is on how they arrive at these numbers.
For eg: there are prime lenses which ...
3
votes
4answers
251 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 ...
3
votes
3answers
213 views
What does it mean that a lens is x millimeters?
Every lens has different focal length in terms of millimeter so if I have a 100mm lens, what does that refer to? Does it mean the length of the lens itself is going to be 4 inches long, or does this ...
0
votes
1answer
159 views
Relationship between camera sensor size and lens focal length [duplicate]
I am choosing a camera and lens.
I want to buy a Canon EOS 650D, as this camera seems to be a good point of entry into the world of SLR.
My question is in the following:
The EOS 650D has a cropped ...
3
votes
1answer
242 views
How do I properly understand what f-stop is? [duplicate]
I don't quite understand why most lenses seem to have approximately the same diameter aperture regardless of focal length.
F-stop is, by definition, a ratio of focal length to diameter, so a 20mm ...
2
votes
3answers
142 views
Are there specific use-cases in mind that make the 70-200 F2.8 worth its weight/size?
I've been looking to upgrade my Mark iii's kit lens, and am comparing lens strategies. The 70-200mm canon F2.8 seems like an enduring and very popular lens. After holding one, i am left wondering why?
...
2
votes
2answers
180 views
Is lens focal length specified considering the effect of barrel distortion on field of view?
Given a NIKON 14mm f/2.8D ED AF Ultra Wide-Angle Nikkor Lens on a full-frame sensor, in theory the field of view is HFOV: 104° x VFOV: 81°. However this lens exhibits noticeable barrel distortion ...
1
vote
2answers
242 views
What is the benefit of a dedicated wide angle zoom vs a superzoom?
I am considering buying a Sigma 10-20 mm F3.5 wide angle lens for my canon 550D, but not sure what the benefit would be compared to using the wide angle end of my existing Sigma F3.5-6.3 18-250 mm ...
3
votes
1answer
132 views
Why 5-50x focal length for autofocus micro-adjustment?
When we do an AutoFocus Micro Adjustment session, the general opinion is to set the focusing target at 25 x focal length (or somewhere in the range of 5-50 x focal length).
Why is so? What happens if ...
1
vote
2answers
185 views
What does different focal length offer me?
I have a beginner photographer and I have spent a lot of time learning the basics (exposures, lenses, focal lengths, crop factor etc). It's all good except I'm not so sure when I need to buy lenses of ...
14
votes
11answers
2k views
Will a 50mm f/1.8 work for general outdoor photography?
I want to know if it's advisable to use 50mm lens for general outdoor photography. I'm torn between 35mm and 50mm primes, and have read all the pros and cons. I understand that 50mm could be tight in ...
1
vote
3answers
177 views
What is the difference between shooting with different (but similar in quality) lenses at same focal length?
What are the theoretical and/or practical differences between shooting with different lenses at same focal length? For example, if we are shooting with a 24-70mm f/2.8 lens at 70mm focal length vs ...
1
vote
3answers
512 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 ...
10
votes
5answers
398 views
What are the different focal lengths of macro lenses and their advantages?
I am interested in macro-photography. I see there are macro telephoto (zoom?) lenses (e.g. 200mm), or smaller macro lenses (e.g. 40mm) ...
What are the different types of macro lenses and their ...
2
votes
2answers
536 views
Zoom Lens and Prime Lens Photo Comparison
Are there any examples comparing the picture quality of prime lenses and zoom lenses with the same scene and shot at the same focal length? I have not seen anything that shows me why a prime is better ...
-3
votes
1answer
524 views
What is the actual distance for taking a photograph with a 4.3-180mm Super Zoom camera lens vs. a 55-200mm DSLR lens? [closed]
What will be the true actual distance for both lens in terms of actual meters?
5
votes
3answers
797 views
How does using a lens with some focal length on a full frame camera differ from using a lens with “equivalent” focal lens on a crop camera?
As an example, a 35mm lens on a crop body (such as Nikon DX) is said to be "equivalent" to a 50mm lens on a full frame body. Equivalent here means that they will have the same field of view, but what ...
11
votes
4answers
1k views
What is the reference point that the focal length of a lens is calculated from?
I understand the idea of a focal length for a single lens, i e the distance from the lens to the point at which parallel rays of light converge. However, in the case of a photographic lens with ...
1
vote
3answers
541 views
How to compare the focal length of a 50mm prime lens with the default lens of a point and shoot camera?
To imagine the 50mm focal length of a prime lens 1.4F, can I simply zoom the lens of my point and shoot camera up to 50mm?
Will both the focal lengths be same?
Any other way to imagine the focal ...
1
vote
3answers
714 views
50mm lens=75mm on DX camera? [duplicate]
I'm looking for a 50mm lens for my nikon d3100 and I just came across an AF-S 50mm f/1.8G lens and it says in the description that if it's used on a DX camera, the angle of view is going to be 75mm. I ...
3
votes
5answers
5k views
If I have an 85mm lens for portraits, is a 50mm useful as well?
I recently got my Canon EF 85mm f1.8, after lot of thought over if I should buy Canon EF 85mm f1.8 or Canon EF 50mm f1.4, I decided on 85mm so that I can shoot portraits of people even from a ...
1
vote
2answers
1k views
DX 35mm vs FX 50mm
Will the picture taken from
AF-S DX NIKKOR 35mm f/1.8G and
AF-NIKKOR 50mm f/1.8G be one and the same because of the DX and FX format??
12
votes
4answers
1k views
What is a normal lens?
I've heard people call 50mm lenses "normal lenses".
For a lens to be considered normal, does it have to be exactly 50mm or is there some leeway? Does the normal focal length depend on crop factor of ...
1
vote
2answers
598 views
How far away can I be and still get a sharp subject with a 100mm lens?
If I have a 100mm lens, how far away can I shoot the subject? If I am shooting basketball, how far can I shoot the subject and still get a sharp picture?
4
votes
3answers
1k views
What is the meaning of single focal length?
The Nikon AF-S DX Nikkor 35mm f/1.8G is described as a single focal length lens: http://www.nikon.co.in/products.php?categoryid=1014.
What does that mean?
What are its disadvantages as compared to ...
6
votes
6answers
1k views
How do I get the 'equivalent' focal length for a DSLR lens for my camera?
On my Nikon D3000, how do I figure the focal length equivalence? In other words, if I want a lens that is just like a 50mm lens on a 35mm film SLR, I need to multiply by a factor. What is the factor, ...
3
votes
3answers
3k 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 ...
4
votes
2answers
232 views
How rapidly does the focal length-equivalent image change by physically moving the camera?
I have recently begun moving from a Nikon APS-C DSLR to the Micro Four Thirds camera while also transitioning from using a viewfinder to using the LCD screen for framing my shots. Because of the size ...
9
votes
2answers
491 views
Does the size of the front glass mean anything?
Considering the Nikon lenses:
Prime lenses:
AF Nikkor 14mm f/2.8D ED has a huge front glass (●₃),
AF-S Nikkor 50mm f/1.8G has a tiny little front glass, deep inside the body (∙₁),
AF-S VR Nikkor ...
3
votes
3answers
4k views
What does “the telephoto end” and “the wide angle end” of a zoom lens mean?
In the Canon Rebel T3i Manual, page 59, it's mentioned that "If you have a zoom lens, use the telephoto end to fill the frame with the subject from the waist up." Same note on page 61 and another one ...
4
votes
4answers
1k views
When would one choose a 50mm f/1.4 over 85mm f/1.8 (or vice versa) for portraits?
Say you are using a crop body, and you have both 50mm/1.4 USM and 85mm/1.8 USM lens in your bag. Now, you want to take a portrait where there is adequate light and space, and you have decided to take ...
2
votes
3answers
339 views
Should I upgrade my camera or lens to shoot pro hockey games?
I've gotten the opportunity to shoot pro hockey games. My current gear doesn't cut it:
Nikon D70
Nikon 18-70mm F/3.5-4.5 Kit lens
Nikon 70-300mm F/4-5.6 D
Nikon 50mm 1.8D
Monopod
From where i'm ...
4
votes
2answers
637 views
Is it normal for focal length to change while focusing?
When I change the focus distance on my Pentax 55-300mm lens, the focal length appears to change. More specifically, the lens appears to zoom in as I focus towards the minimum focusing distance. This ...
2
votes
1answer
697 views
Which famous photographers used mostly one lens throughout their careers? [closed]
Which famous or outstanding photographers did use mostly only one focal length throughout their career and what focal length did they use? For medium and large format photography, please indicate a ...
8
votes
3answers
647 views
How can a 24-70mm and a 10-22mm both be “wide angle” lenses?
I've been looking at a 10-22mm lens for my Canon T2i. I've also come across some other "wide angle" lenses, like the Sigma 24-70mm F2.8.
I don't understand how a wide angle lens can have such high ...
2
votes
3answers
440 views
EF-S lens focal length [duplicate]
Possible Duplicate:
Does my crop sensor camera actually turn my lenses into a longer focal length?
If I have an EF-S lens with a focal length of 10mm on an APS-C camera (i.e. with sensor ...
12
votes
3answers
1k views
What is a parfocal lens and how beneficial is it to photography?
I heard someone say that after using a parfocal lens for the first time, they would never switch back. What is a parfocal lens, how is it different from any other lens, and what are the advantages and ...
3
votes
3answers
1k views
What does the millimeter measurement of a macro lens mean?
I understand that the millimeter measurement on a lens is, for lack of a better term, how far it can "zoom" in or out, but what about macro lenses? What does the millimeter measurement signify? How ...
5
votes
2answers
3k views
Is the difference between a good 50mm vs 85mm lens just your distance from the subject?
I was wondering: is the difference between a 50mm f/1.8 lens and a 85mm f/1.8 lens just your distance from the subject? Let's assume that distortion is minimal; both lenses are of high quality. Does ...
18
votes
5answers
26k views
How do I convert lens mm to optical zoom times?
What is the rule to convert the 'mm' notation to the 'optical zoom' notation? I searched a bit and found this one:
optical zoom = maximum focal length / minimum focal length
For example a 18-55mm ...
4
votes
2answers
1k views
If I have a 28mm f/1.8 lens (on a crop body), do I still need the 50mm f/1.4?
I have the Canon 60D and a Canon 400D (my original camera). I have two lenses a Sigma 50mm 1.4 HSM and a Canon 28mm 1.8 USM. Both lenses are incredible performers. I've noticed the bokeh I receive on ...
5
votes
6answers
1k views
In what situations should I use which lenses while traveling to Paris?
I'll be travelling to Paris and I'll be bringing me with a Canon T2i/550D, a Canon EF-S 18-200mm f/3,5-5,6 IS and a Tokina 11-16mm f/2,8 (I could also bring a Canon EF 50mm f/1,8 II). I bought the ...
11
votes
4answers
610 views
What does 'Equivalent to 1.6x the focal length of the lens' mean?
In the specifications of Canon 550D, about the lens the following is mentioned
LENS
Lens Mount EF/EF-S
Focal Length Equivalent to 1.6x the focal length of the lens
Now this is really ...
4
votes
5answers
949 views
Is an EF 50mm f/1.4 the same as 50mm with an EF-S lens on a Canon 550D?
I have a Canon 550D with the standard 18-55mm kit lens. The 550D has a 1.6× crop factor.
My question is very simple but whenever I've asked before (Yahoo Answers) I always got overly-complicated ...
5
votes
7answers
2k views
How can I visualize or simulate the effect of different focal lengths?
I have seen many camera review sites illustrate the effect of using different focal lengths on the same photograph using frames. There are also similar illustrations to compare different sensors (full ...
21
votes
5answers
3k views
How to capture the scene exactly as my eyes can see?
What settings of my DSLR camera will emulate the scene exactly as I can see through my naked eyes?
I think it's not possible to get the contrast and colors exactly as my eyes can see, and it may vary ...
12
votes
2answers
572 views
Does a crop sensor affect closest focusing distance? Why does it not affect focal length in EXIF data?
Since I am considering to buy the Nikkor 105mm micro VR, I wondered if the cropped sensor does affect the closest focusing distance of 0.31m?
Thinking about this, the following additional (and ...
11
votes
2answers
995 views
When I use FX lenses on a DX camera, does the focal length or minimum aperture change?
If I put a Nikkor 35mm f/2 FX lens on a DX camera, is it still 35mm f/2, or has the effective focal length or minimum aperture changed, because it is being used on a smaller format than what it was ...
14
votes
5answers
4k views
Can I use my APS-C kit lens as a reference for choosing between 50mm or 35mm prime lenses?
I'm looking at getting a second lens in addition to my Nikon D7000's kit lens.
I want to know if it's possible to use my 18m-105mm kit lens to get an idea of the focal length for a 35mm lens vs. a 50 ...
