Last post by Trevor Tieche in topic Action shot issues

Topics: 2969
Posts: 32569
Back to forum

Telephoto Lens What Are Their Function ?

 
 
Total results: 5
Pages: 1    [1]
 
Deleted profile
Date: 2007-04-24 09:33
a simple reply would be fine

Simon's Photography
Simon's Photography
ID: 185806
Posts: 411
Date: 2007-04-24 09:36
Simple answer....make distant objects appear bigger....try using google from time to time or wikipedia...you will have your answers a lot quick
We Don't Take Risks to Escape Life!!
We Take Risks To Prevent Life Escaping Us!!

Awkward Morning Productions
Awkward Morning Productions
ID: 191761
Posts: 22
Date: 2007-04-26 11:59
Telephoto lenses are lenses with longer focal lengths. The name telephoto is just a name, its pretty arbitrary and is just a reference to the focal range of the lens.

Different lenses are used for different purposes. On DSLR's, portrait photography is usually done with with lenses around 45mm - 55mm lenses (the equivalents to 35mm lens on a film slr).

Medium to longer range lenses range from around 55mm - 150mm. At the longer focal length they can be considered mild telephoto lenses.

Telephoto lenses are usually lenses that have a focal length > 200mm. These are often the really long ones that you see at sporting events, etc.

-----
Now that we got those taken care of, lets figure out what different focal lengths mean for our pictures. You had a question in another part of the forum, asking about Depth of Focus (which I assumed perhaps incorrectly you meant Depth of Field). At longer focal lengths (in the telephoto range, etc) You tend to have shallower DOF (ie smaller).

At longer focal lengths (200mm for example), there is MUCH more compression in the picture, as in the background is brought much closer, and it makes things appear closer together (distance wise directly away from the camera). So if a subject is standing about 5m in front of a car and you fill the frame (the subject takes up the same amount of room in the viewfinder, for each lens) with the subject. You will see at a short focal length, you can see more of the background objects. The car will look normal.

At the longer focal length (200mm) the subject will appear to be the same size, but now the car will be filling the background of the picture and say the wheels may not even be visible anymore.

I could launch into a drawn out explanation of optics and parallax, and all that good stuff, but that's best left for exploration on wikipedia :)



Remember, telephoto lenses are used to pull subjects closer (magnify them) so you can take their picture. They also compress subject and background closer.


Christopher

Glen Arreglo
Glen Arreglo
ID: 174604
Posts: 63
Date: 2007-05-03 04:27
photographing a distant subject so that you no longer walk near it.

Mark Hiatt
Mark Hiatt
ID: 190301
Posts: 20
Date: 2007-05-08 12:22
Telephoto lenses are exceptionally useful in such types of photography as wildlife. Anyone who's tried to get a headshot of a deer with a 50mm lens on a 35mm camera will attest to this. Most of my photography is done with my grandpa's Minolta X700 outfir that he left me when he died. I've found that the best portrait lens for this camera is a 135mm telephoto. I own telephoto and zoom lenses ranging from 19mm-500mm. 19mm is an ultra wide angle lens (objects seem very far away) and 500mm brings in the subject about 6X closer.

Announcement
From now on 50 activity points will turn into 1 credit, so you may earn credits as easy as never before !!!



All models and photographers are able to moderate photos! We will save a lot of time for moderators this way. Please read the short instruction on how to moderate and earn points very quickly.
Also, models and photographers can moderate part of the profiles as well! This is a fast way to earn some action points and credits!
 
 
Total results: 5
Pages: 1    [1]