I have a Nikon D40x. Is there a big difference between Sigma lenses "for Nikon" and a Nikkor lens? I am looking at the AF-S Zoom-Nikkor ED 18-200mm f/3.5-5.6G IF DX VR or the Sigma Zoom Super Wide Angle 18-200mm f/3.5-6.3 DC OS (Optical Stabilizer) Lens for Nikon Digital SLR. There is a big difference in price - what about quality??

room?
A- zoom
B- wide-angle
C- telephoto
D-concave

Does this mean that if it were on a Nikon 35mm camera it would be the equivalent of a 27mm-82mm lens? ( Using NIkons 1.5x multiplier ). The reason I ask is that I am more familiar with 35mm lens focal lengths. Just trying to figure out what lens I am getting.
Zoom,wide angle etc...

I'm interested in learning some basics about telephoto camera lenses. I was expexting to see the magnification described as 2x, 3x etc., but instead I saw an ad that said "Magnification: (65 to 600mm)", I don't know what that means.

I am thinking about buying a digital camera that also does movies, and a lens for photographing wildlife. I would like to do extreme closeups from 50-100 feet away. After researching, I would like to take a chance on ebay and get the most zoom for the buck. General 'newbie' tips appreciated.
Thanks averyone. Fredshelp, this was very well stated, "The 2x, 3x 10x designations are really just the rough result of dividing the Telephoto number by the Wide Angle number." Now I see, I will start researching when school lets out, but the great posts here will be a good launch.

I own the Nikon P5100 and I want to know if there are any adapters or attachments to get SLR lenses to work with a Point and shoot camera? Or if there is just a way to increase the zoom on a Point and shoot? I know they make a wide angle and telephoto lens for the P500 and P5100, but it still doesn't help any with an actual zoom. So is there anything? or would I have to just get a DSLR ?

I have an EOS 350D with an 18-55mm lens.

I would like a different type of lens (wide angle or telephoto) that is about £200. could someone give me an idiots guide to what all the terminology means and how the mm's equate in picture terms.

i.e. a 10-20mm will give a wide landscape/close up etc etc...

Thanks!

I'm an advanced beginner digital photographer, but I've never used a DSLR before, and I'm going to receive an XSi (just the body) for my birthday. However, I have no clue about what lens to get with it. I'd like a lens that can do a variety of things: auto focus, IS, and can do telephoto and wide-angle. Macro would be nice too; i like to take close-ups of plants and flowers. I'm also on a budget, so the cheapest would be best. Any suggestions? It needs to be a Canon brand lens, because I've heard that the XSi can be picky about lenses. Thanks!
Thanks so much! However, if I had to choose only one of those, do you think that the 18mm-55mm is definitely a necessity, and the 55mm-250mm is really good, but not essential? Or the other way around? Or do I definitely need both?
Wow, everyone's so helpful! One last thing: what exactly do those two lenses do? Is the 55mm-250mm more for close-up or far away?

I have an Olympus SP-320, which allows me to add lenses. I am considering buying my first lens, and want to know which one is the best choice for my first lens. 2x Telephoto, 3x Telephoto, Wide Angle, or Fish-eye? Right now I use my camera for alot of different things including landscape, sports, and the typical point and shoot family event stuff.

And when I put a wide angle on isn't that the same as walking backwards a bit. Sorry really film novice here, please explain! J

The camera is an old Ricoh XR-1 with Pentax K lenses. There two telephoto, a wide-angle, and a normal lens I'd like to use with a digital SLR.

I have a Canon Rebel Ti which is a 35mm camera not a digital. It takes EF lenses. I am not much of an expert when it comes to photography. But I do understand a lot about it. I found these three lenses that I was considering buying and wanted to know what you think. If you have other suggestions, please post a link to the lens that you think is better. Also, who do you think makes the best cameras? Canon, Nikon, etc..... I also understand what aperture is but I don't know which aperture I should get for any of these. Keep in mind I take photos for all occassions like parties, well lit places, concerts where it is dark, etc....

Telephoto:
http://www.wolfcamera.com/product/541161519.htm?bct=%3Bcicamera-lenses%3Bcislr-lens%3Bcilenses-for-canon
Wide Angle:
http://www.wolfcamera.com/product/541166716.htm
Fisheye:
http://www.wolfcamera.com/product/541168134.htm?bct=t13031003%3Bcifilm-cameras-and-accessories%3Bcicamera-lenses%3Bcislr-lens%3Bcislr-lenses

I recently purchased a Canon Digital Rebel XT, EOS 350 D camera. I am a complete beginner at this, so I need a lot of guidance.

We are going to Paris, France in a few weeks, so I need to know what the best lenses would be for shooting pics of the Eiffel tower (from near and far away) and the catacombs, etc.- wide angle and telephoto. Also, I want them to be zoom lenses. The kit lens that came with the camera just doesn't zoom in enough for me.

Also, do you know where I can get them? I live in Germany,so the place would have to ship to an APO address.

Thanks so much!

I have a manual SLR camera (Pentax MX), three lenses (50mm, 28mm wide angle, 100-300mm zoom) and a flash that I want to sell on EBAY.

The lenses go with the camera, but can be used for other like-cameras (model and type). The flash can be used with any manual SLR camera. All of them are in mint condition.

Here's the question:
Should I sell them as a group on EBAY as a group, or sell them individually?

Thanks for your help!

I have the EFS 18-55mm lens that came with the camera and it is quite good but, it is a bit lacking if you get out of auto or program modes. I got nothing but confused looking at Canon's website for a better lens. Some will fit only certain digitals. I have all the 35mm film lenses I need so I'm not looking for one that fits both types of camera. However, I would like a lens that is not dedicated to the Rebel should I decide to upgrade my camera in the future. Right now I am looking for a wide angle zoom with large enough aperture to blur background. I haven't been able to achieve this with much success with the 18-55. Any thoughts out there worth looking in to?

I am a beginner in the field of digital photography and I need to buy a good wide angle or wide-zoom angle lens with the following specifications:
- Dedicated for Canon EOS Rebel Xti (400D).
- Less than (0 US).
- The minimum focal length must be equal to or less than (17mm).

If you will suggest any other entry level wide lenses, I will be so thankful for your help.