Why ultrawide angle lens need large aperture


Ming1388

New Member
Jul 30, 2013
161
0
0
Singapore, Orchard
#1
Hi Guys,

Hoping someone could help me understand some basics with regards to wide or ultra wide angle lens. From what I can see, when you pay more for pro quality lens, you get larger aperture of lets say 2.8. I understand this is better glass and allows more light, but what I can’t seem to get is why you would need such large apecture for wide angle lens, which are mostly used for landscape where people tend to use higher apertures to get more DOF? Am I missing something here?

Example would be Nikon 14-24 2.8 vs 16-35 f4? Obviously there is the 3mm in length

Hope your all able to help me understand this better
 

catchlights

Moderator
Staff member
Sep 27, 2004
21,903
46
48
Punggol, Singapore
www.foto-u.com
#2
1, wide angle lens are not just for landscape photography only
2, some time photographers need to shoot wide open aperture to get what he is looking for
3, lens have large aperture, does not mean you need to shoot at wide open all the time
4, large aperture lens bring more light, it also makes the view finder brighter and easier to do focusing, manually or auto
5, wider aperture version lenses are usually classified as pro grade lenses, with higher optical quality and build, so come in a premium price tag.
6,
 

Last edited:

CasualBear

New Member
May 4, 2013
485
0
0
singapore
#4
More light more fun??

don't think it's just wa lens.. even tele like 70-200, the manufacturer if cost no factor would try to have wider aperture..
 

Ming1388

New Member
Jul 30, 2013
161
0
0
Singapore, Orchard
#5
Hi Guys,

thanks for the response, guess that answers my question. I as under the assumption that wide angle/ultra wide was primarily used for landscape so couldnt understand why people would spend the extra to buy the pro glass if its only for the extra light since you wouldn't should landscape with f2.8.

I can understand why why wide apertcures are used for tele lens since they are used specifically to throw out the background or isolate the subject but cant find the reason for ultra wides. guess shooting at night hand held?

Many thanks

Ming
 

TWmilkteaTW

Senior Member
May 30, 2011
2,251
1
0
#6
Hi Guys,

Hoping someone could help me understand some basics with regards to wide or ultra wide angle lens. From what I can see, when you pay more for pro quality lens, you get larger aperture of lets say 2.8. I understand this is better glass and allows more light, but what I can’t seem to get is why you would need such large apecture for wide angle lens, which are mostly used for landscape where people tend to use higher apertures to get more DOF? Am I missing something here?

Example would be Nikon 14-24 2.8 vs 16-35 f4? Obviously there is the 3mm in length

Hope your all able to help me understand this better
As what uncle catchlight has mentioned above.
Also..with 2.8...it gives the user more flexibility.. at least..he/she can go to F2.8 if needs/want to..but with F4..u cant go to F2.8..
Right.. generally if shooting landscape photo..u would want or tend to use larger aperture..but if the scene is very far..
You dont necessary need to shoot at >F8 or etc.. in this case..F2.8 maybe alright too. Depending what you want to achieve and how you would like your photo to look like.

Last but not least..For people like me...who dont have or wish to carry a tripod around..i can just shoot at F2.8 can get pretty good results.. not F4..with higher ISO.. :)

Long story short..it is useful..but if u dont need it..then just get the F4 or variable aperture lenses..save you more money and less weight to carry.
 

tecnica

Senior Member
Dec 26, 2004
3,660
10
0
#7
Some genre of landscapes requires wide aperture, ie shooting the aurora borealis and australis.
 

edutilos-

Senior Member
Dec 28, 2010
6,041
17
38
The Universe
www.facebook.com
#8
There are endless opportunities for requiring a fast UWA lens. I've listed some below, some of which have been mentioned by other members. If you have a large aperture you will have an OPTION. If you don't you don't get the option. I myself don't need these OPTIONS that much, I like to travel light, and I'm a cheapo who doesn't like to spend too much on gear. So wide aperture UWA is out of the question for me. :)

1. Weddings. More environmental shots (i.e. wider perspective) - YES you can try to do off camera lighting/assisted lighting - on-camera flash is out of the question, because you will cast shadow, more likely than not. Off camera flash/other form of lighting like continuous will not be so easy to set up on the spur of the moment.

2. Certain places do not allow you to use tripod, or use of tripod will be hopeless. Some places ban use of tripods because they don't want people to trip over, etc. Having a larger aperture gives you more chance of nailing a shot. If you are on a MOVING OBJECT like a boat or the Singapore Flyer, having a large aperture will allow you to use a lower ISO - you will have to balance the loss in sharpness because of wider aperture use versus using a higher ISO.

3. Stationary stars. Sure, you can do a 4 minute exposure in pitch-black darkness, but the stars will streak just a little. Very ugly. To get stationary stars you would need 30 seconds or less usually. Sometimes a fast aperture will allow you to avoid crossing that thin fine line for your camera where noise levels become unacceptable.

I'm sure you can think of many other situations. Photography is a non-rigid thing, your choice of gear depends largely on your use, your preference. Cheers.
 

edutilos-

Senior Member
Dec 28, 2010
6,041
17
38
The Universe
www.facebook.com
#9
Some genre of landscapes requires wide aperture, ie shooting the aurora borealis and australis.
Might help to elaborate why.

Aurora borealis does "move", so having a large aperture helps to shorten exposure times rather than end up with a blurry looking aurora which will be "less clear". Just think of cloud trails or blurry water, and think of the beautiful northern lights shots that we've all seen. Having those colors become streaky would be really "ugh" more than "ahhh". :bsmilie:
 

Octarine

Moderator
Staff member
Jan 3, 2008
12,516
30
48
Pasir Ris
#10
Looking at how aperture is defined it becomes obvious that it is fairly easy to have f/2.8 lenses in this area of short focal length.
http://en.wikipedia.org/wiki/Aperture
In reverse, it also explains why lenses with longer focal length become expensive and heavy to achieve f/2.8. So it's not a matter of 'Who would need this?" but rather "It's easy to achieve".
A second factor is phase detection focusing used in the AF sensors of many cameras. The wider the aperture the better and more accurate the AF system works. Having an aperture opening of f/2.8 or wider supports the accurate focusing of the lens (beside other factors that shall be skipped here).
 

tecnica

Senior Member
Dec 26, 2004
3,660
10
0
#11
Might help to elaborate why.

Aurora borealis does "move", so having a large aperture helps to shorten exposure times rather than end up with a blurry looking aurora which will be "less clear". Just think of cloud trails or blurry water, and think of the beautiful northern lights shots that we've all seen. Having those colors become streaky would be really "ugh" more than "ahhh". :bsmilie:
if the aurora is photographed with a rather long exposure, end up it will become a mess of light. the 'dancing' element will be lost through the extended shutter speed. :(
 

daredevil123

Moderator
Staff member
Oct 25, 2005
21,657
68
48
lil red dot
#12
Hi Guys,

thanks for the response, guess that answers my question. I as under the assumption that wide angle/ultra wide was primarily used for landscape so couldnt understand why people would spend the extra to buy the pro glass if its only for the extra light since you wouldn't should landscape with f2.8.

I can understand why why wide apertcures are used for tele lens since they are used specifically to throw out the background or isolate the subject but cant find the reason for ultra wides. guess shooting at night hand held?

Many thanks

Ming
Wide apertures do not only throw out the background. Wide apertures also give your faster shutter speed.
Ultra wides is not just meant for landscape...

shot with ultrawide

Weddings


Also for travel


Also for events


In other words, how you use a focal length is really up to your creativity. The ultrawide is one of my most used lens.
 

Last edited:

Ming1388

New Member
Jul 30, 2013
161
0
0
Singapore, Orchard
#14
Wow incredible pictures everyone.

Thank you very much in helping my understanding. I think I finally understand especially seeing the pictures, the use of wide angles for indoor and low light areas

Much appreciated.
 

Top Bottom