Lens sizes?
Answers: In 35mm show cameras, a 28mm was considered a typical all-embracing angle lens. A 50mm was a 'normal' lens and usually come with the camera. A 135mm be a very popular telephoto.
Each have it's purpose. It's like asking which is better, a axe, a fork, or a spoon.
Think of it this way. You're surrounded by a concert.
A 28mm shot shows the auditorium and the stage.
A 50mm shot shows the singers and backup band.
A 135mm shot shows the head singer.
A 300mm shot shows her tonsils. (kidding)
That's why zooms are so popular. They consent to you change view quickly minus changing lenses. It's interesting how cameras come with 50mm lenses, but photographers bought 85 to 105mm short telephotos for their portrait lenses. Here's my lift on that.
A 50mm reproduces what your eyes see.
A 105mm reveals what you're paying attention to.
I hope this is compliant.
It depends on whether you are using a digital SLR or a film SLR, but the 135 mm lens is a "telephoto" lens that will take home the subject appear closer to you, as if you used a mild telescope. One is not better than the other, unless we get into some reflective academic arguement.
Here is a mini-tutorial I made myself to compare focal length. This is NOT a lens test or a camera tryout! It is merely intended to show the difference between various focal length. The lens was the Nikon 18-200 VR lens, which is (by definition) an 11X lens, but that 11X does not inform you what the final image will look close to. I added one more frame taken next to a 300 mm lens. The camera was a Nikon D200 so at hand is a 1.5X "crop factor," "lens factor," or "focal length multiplier." There is further explanation on the image itself. It would facilitate if you click on "All Sizes" above the image.
http://www.flickr.com/photos/7189769@n04...
This be done with two different lenses: the Nikon 17-55 and 70-300:
http://www.flickr.com/photos/samfeinstei...
A 50mm lens is considered a "normal" lens contained by 35mm photography since it approximates the angle of vision of the human eye.
A 135mm lens is a short telephoto lens.
Since the 135mm lens is 2.7 times "longer", an statue made by a 135mm lens will be 2.7 times larger than the same print, from the same distance, made by a 50mm lens.
A 50mm lens is a "normal" lens while a 135 is a small telephoto.
The 50mm focuses closer surrounded by distance (up to 18") and is faster (smaller F stop) but it has rather line bend (making the muzzle a tad bigger than the ears, just a short time ago a tad).
The 135mm won't focus closer than 5 feet, but it brings things surrounded by 2 1/2 closer. It's slower (larger F/stop) but flat field, making it perfect for portraits (no line bend, muzzle and ears retain proportional shape).
Ignoring the 1.5x factor using a digital SLR rather than a 35mm motion picture camera, there are 3 basic classes of lens, wide angle, typical and telephoto. My Pentax digital SLR came near a 18x55mm zoom lens for example. That means when I zoom down to the 18mm setting I attain a wide angle of judgment and when I zoom up to the 55mm setting I get a telescope or magnified picture. Now if we stick in that 1.5 factor, and compare it to a 35 picture camera, at the 18 setting, it acts similar to a 27mm wide angle and at the 55mm setting it act like an 82.5mm telephoto lens. As to what take better pictures, there is no answer as such. A cavernous angle has it's place contained by macro work in finicky and is good for group shots from a point where on earth you want wide coverage. The middle-of-the-road setting refers to what the eyes see from the point of viewing the subject and the telephoto lets you zoom contained by on the center of the view nouns. Hope that is clear for you.
All right answers. I especially like George Y. when he said a 50mm shows you what the eye see, the 105 shows you what you're paying attention to.
I would join to these answers that you need to consider WHERE you are going to be taking photographs. If outdoors, the 105 might be a better choice but if you are indoors, you may find you want something a little wider such as the 50. I prefer a 23 to 28mm for indoor work (digital equivalent 18mm) to invasion more of what is happening surrounded by a room. To get closeups surrounded by a room, simply walk up to the subject. If you are outdoors and want to acquire closer to a bear, use a 105, do not meander up to it.
Perhaps you would rather find a nice zoom lens and bring the best of both worlds by sacrificing a couple of F-stops.
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