Such a beginner question, but i just have to ask...

Discussion in 'Digital Discussion & Q&A' started by dan.rpo, Apr 1, 2009.

  1. dan.rpo

    dan.rpo TPF Noob!

    Joined:
    Oct 20, 2008
    Messages:
    172
    Likes Received:
    0
    Location:
    Long Island, NY
    Can others edit my Photos:
    Photos NOT OK to edit
    so...what are the main advantages of a lens with a very high aperture (ex: f/1.4 or 1.8, even 2.8) besides the ability to snap photos in low light situations without a flash?

    i have a nikon d40 and am interested in purchasing the 35mm af-s f/1.4 (maybe its 1.8, i forgot). thanks!
     
  2. Garbz

    Garbz No longer a newbie, moving up!

    Joined:
    Oct 26, 2003
    Messages:
    9,713
    Likes Received:
    203
    Location:
    Brisbane, Australia
    Can others edit my Photos:
    Photos NOT OK to edit
    The low light obviously helps but only against a kit lens. The difference between 2.8 and 1.8 is only 1 stopish, 1.8 and 1.4 is only 1/3rd. Then you have to deal with the depth of field too so even at low light you may not want to shoot wide open.
     
  3. dan.rpo

    dan.rpo TPF Noob!

    Joined:
    Oct 20, 2008
    Messages:
    172
    Likes Received:
    0
    Location:
    Long Island, NY
    Can others edit my Photos:
    Photos NOT OK to edit
    so than what are te advantages of having such a large aperture?
     
  4. Dwig

    Dwig TPF Noob!

    Joined:
    Mar 11, 2009
    Messages:
    1,261
    Likes Received:
    0
    Location:
    Key West FL
    Can others edit my Photos:
    Photos NOT OK to edit
    Advantages:

    1. wider aperture, if used, yields higher shutter speeds, all else the same. This can be an advantage in low light shooting. It can, with long lenses, allow for better hand held images.

    2. wider aperture, again if used, has less depth-of-field. Shallower DOF can be very effective artistically, particularily in portrait work. It also makes manual focusing much, much easier and more precise.
     
  5. Chris of Arabia

    Chris of Arabia Herding cats since 1988... Supporting Member

    Joined:
    Mar 10, 2007
    Messages:
    7,825
    Likes Received:
    16
    Location:
    The Magic Kingdom
    Can others edit my Photos:
    Photos OK to edit
    As a general rule of thumb, f/2.8 and wider will be found on better quality lenses, but this isn't always the case.

    Disadvantages:

    • higher cost
    • heavier lenses
    • more difficult to focus precisely, particularly when close to the subject
     
  6. mrodgers

    mrodgers No longer a newbie, moving up!

    Joined:
    Dec 13, 2007
    Messages:
    1,662
    Likes Received:
    7
    Can others edit my Photos:
    Photos OK to edit
    Not a user of large apertures with my lack of a dSLR, but I've been reading plenty lately in the threads about the large aperture lenses. Thus, this hasn't been mentioned yet....

    Stopping down a large aperture is said to net a sharper image than a lens with a smaller aperture. Example, stopping down a f/2.8 to f/4.0 will result in better sharpness than an f/4.0 max lens.
     
  7. dan.rpo

    dan.rpo TPF Noob!

    Joined:
    Oct 20, 2008
    Messages:
    172
    Likes Received:
    0
    Location:
    Long Island, NY
    Can others edit my Photos:
    Photos NOT OK to edit
    hm,interesting last post mrodgers. well....i have the funds to purchase either the nikon af-s 55-200mm VR f/4.0 or the nikon af-s 35mm f/1.8.....what would make a better purchase? i know they are two TOTALLY different fields.

    i was going to buy the 55-200 because i like doing urban candid pics, such as the city population and street shooting. but the low light aspect and sharpness of the high aperture is making me think twice.
     
  8. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

    Joined:
    Dec 16, 2003
    Messages:
    33,821
    Likes Received:
    1,811
    Location:
    Edmonton
    Can others edit my Photos:
    Photos NOT OK to edit
    It most cases, a large aperture lens is going to be a premium lens. For example, most of Canon's ultra fast lenses (F1.2 & F1.4) have the 'L' designation...which is their top of the line. So besides having a large aperture, they also have the best quality glass, weather sealing and overall quality.

    Also, most of the time, a prime (non zoom) lens will give you better image quality than a zoom lens. (although zoom lenses are much better than they used to be). To further that, you will usually find that a short range zoom (24-70mm for example) will be a lot better than a wide range zoom lens (18-200mm for example).

    As for what you should choose...it's a very personal decision. Some people like prime lenses because of the high quality, large apertures and the fact that it forces them to use their feet to zoom and also to thing more about their shot before they take them. Some people like zoom lenses because of the convenience.
     
  9. paulk_68

    paulk_68 TPF Noob!

    Joined:
    Feb 14, 2009
    Messages:
    229
    Likes Received:
    0
    Location:
    New York
    Can others edit my Photos:
    Photos NOT OK to edit
    Hmm, how many lenses max out @ f/4? I took some shots recently with my cheap kit lens with my aperture @ f/22. Save money on glass by buying a camera body that handles high ISO speeds with minimal noise.
     
  10. tsaraleksi

    tsaraleksi TPF Noob!

    Joined:
    Jun 12, 2007
    Messages:
    1,045
    Likes Received:
    0
    Location:
    Greencastle Indiana
    Can others edit my Photos:
    Photos NOT OK to edit
    I think you have something very confused, but I'm not entirely sure what it is...

    The 35 is a vastly better lens for doing city shooting. So, buy the prime!
     
    Last edited: Apr 2, 2009
  11. mrodgers

    mrodgers No longer a newbie, moving up!

    Joined:
    Dec 13, 2007
    Messages:
    1,662
    Likes Received:
    7
    Can others edit my Photos:
    Photos OK to edit
    Even I know how very wrong that suggestion is.
     
  12. bdavis

    bdavis TPF Noob!

    Joined:
    Jan 14, 2009
    Messages:
    784
    Likes Received:
    3
    Location:
    Iowa
    Can others edit my Photos:
    Photos NOT OK to edit
    Besides don't a lot of lenses start losing resolution when they get past f/16? I read that somewhere...
     

Share This Page