To Zoom or Not to Zoom... That is the quesiton.

Discussion in 'Beyond the Basics' started by TDSapp, Jul 27, 2007.

  1. TDSapp

    TDSapp TPF Noob!

    Joined:
    Jun 17, 2007
    Messages:
    24
    Likes Received:
    0
    Location:
    Frisco Texas
    Can others edit my Photos:
    Photos OK to edit
    What is better? When I am shooting at a rocket launch I use a Nikon D70 with a 70-300mm lens. When I first started shoiting rockets I found that I was standing along way away and putting the camera at 300mm. Now I find that I am getting closer and only shooting around 135mm. I just "feel" that being closer with a shorter focal length gives me more details when I am done. Is this just a feeling or am I getting more detail by being closer like that?

    Here are a couple of the photos that I have taken.


    [​IMG]

    [​IMG]

    Nikon D70
    70-300mm @ 135mm
    f8 2500/sec
    ISO 100


    Tim Sapp
     
  2. lifeafter2am

    lifeafter2am TPF Noob!

    Joined:
    Jul 14, 2007
    Messages:
    1,317
    Likes Received:
    0
    Location:
    Orlando, FL
    Can others edit my Photos:
    Photos NOT OK to edit
    I know some lenses have fallout (I think that is the right word) at longer focal lengths. It would depend on how good of a lens you have.
     
  3. 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
    There are several 70-300. The AF Nikkor is horrible at 300mm compared to 200mm, and so is the Sigma. The 70-300 AF-S VR Nikkor isn't too bad at 300 though. Pretty much nearly all zoom lenses falloff at the long end of their zoom.
     
  4. gmarquez

    gmarquez TPF Noob!

    Joined:
    Mar 24, 2007
    Messages:
    486
    Likes Received:
    1
    Location:
    Arroyo Grande, CA
    Can others edit my Photos:
    Photos OK to edit
    Not related to photography, but...are those high-powered rocketry birds? What kind of engines are they using? Pretty nice pics!
     
  5. TDSapp

    TDSapp TPF Noob!

    Joined:
    Jun 17, 2007
    Messages:
    24
    Likes Received:
    0
    Location:
    Frisco Texas
    Can others edit my Photos:
    Photos OK to edit
    Yeah this is High Power Rocketry... The Diablo is a L3 certification and is flying on a single N motor. The motor is APCP and is the same propellant that is used for the Solid Rocket Boosters for the shuttle.

    Here is another photo so you can get the idea of the scale. Ron is at least 5'10 or taller.

    [​IMG]



    The Thor-X is 28.5' tall and weighed 335lbs loaded. It is flying in this photo on 1 N motor and 3 M motors all lit on the pad (no air starts).

    Tim Sapp
     
  6. mylegacy412

    mylegacy412 TPF Noob!

    Joined:
    Jan 30, 2007
    Messages:
    59
    Likes Received:
    0
    Location:
    Sacramento, CA
    Can others edit my Photos:
    Photos OK to edit
    ooOOOOoooo rockets!

    lol. cool pics
     
  7. THORHAMMER

    THORHAMMER TPF Noob!

    Joined:
    Dec 24, 2005
    Messages:
    2,789
    Likes Received:
    8
    Location:
    Orange County, CA
    awesome one of those rockets says thor on it !!!!

    yey
     
  8. TDSapp

    TDSapp TPF Noob!

    Joined:
    Jun 17, 2007
    Messages:
    24
    Likes Received:
    0
    Location:
    Frisco Texas
    Can others edit my Photos:
    Photos OK to edit
    Thanks for the comments on the pictures and the rockets.

    ---

    Lets get a bit deeper on the orignal quesiton. Lets say that the zooms are created equal, that there is no fall off on the lens when at 300mm. Does a shorter focal length allow more light and more detail to hit the sensor?

    When shooting a large object that has lots of detail (like smoke and fire), which is better;

    A. to be 150' from subject and at 135mm

    or

    B. to be 300' and at 300mm


    I am thinking that just like our eyes that if we are closer we are able to see more details when closer. But... Our eyes are not designed to get "closer" to the subject like a zoom and change the focal length as much as a camera.

    Tim Sapp
     
  9. 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 only thing that would change is the perspective. From 300' at 300mm the background would appear larger. The rest comes down to your equipment. If you feel that the lens you are using is not sharp at 300mm and sharpness is one of your primary criteria for a good image then you may be better off trying at 150'
     
  10. jstuedle

    jstuedle No longer a newbie, moving up!

    Joined:
    Jun 30, 2005
    Messages:
    4,889
    Likes Received:
    14
    Location:
    S.E. Indiana
    Can others edit my Photos:
    Photos NOT OK to edit
    If you usually shoot at the same range and focal length, Try a prime lens of that focal length. You should see a noticeable increase in sharpness and detail. I think I would compromise and maybe shoot a 180 f/2.8.
     
  11. fmw

    fmw No longer a newbie, moving up!

    Joined:
    Sep 30, 2006
    Messages:
    2,601
    Likes Received:
    137
    When you get closer with a shorter lens you reduce the perspective foreshortening, increase depth of field at every aperture and you reduce the likelihood of camera shake. That's the difference. As long time wide angle shooter, I have a tendency to prefer getting as close as I can to the subject.
     
  12. Neuner

    Neuner TPF Noob!

    Joined:
    Mar 14, 2007
    Messages:
    314
    Likes Received:
    0
    Location:
    In my home.
    Can others edit my Photos:
    Photos NOT OK to edit
    Smoke & Fire! Um, I'd be as far away as possible :wink:.
     

Share This Page