Is an 18-200mm the same as two separate- 18-55 & 55-200mm?

I know this is probably a really stupid question but I was thinking of buying a new 55-200mm lens for my Nikon but from SIGMA (my friend has one and they are so much clearer & better quality), but then I saw the 18-200mm by SIGMA, and was wondering if I sold both my lenses and just bought the 18-200mm then I would only need to carry around one lens, would it be the same as having two separate lenses?

Cheapest camera for gemstone photography as well as domestic outdoor use?

I need to buy a latest digital camera for domestic use as well as for gemstone photography, but not expensive.
earlier i had casio exslim ZX 60, with that i could not take gemstone pictures.
i just noticed nikon S 3000 for $ 125. What about that? Any other suggestion?

What camera? YOU CHOSE

All right so I have been searching around for a hd slr camera and I have found the
DMC-FZ100 "it's da panasonic brand"
and the
P100 "ala nikon brand"
What one would you chose and why?

And don't suggest any other camera UNLESS it has hd movies and can take super good pics and be around 300$ on AMAZON

What is the most appropriate DSLR camera for amateur photographers?

I'm 15 years old and looking to buy a DSLR camera, i have a price limit of about $500 and know that Canon and Nikon are considered the 'pro' brands but want something simple to navigate, and takes good pictures that i can play around with. Any ideas?

Nikon vs Canon SRL cameras?

I need people's opinions on who should I go for. I'm getting my first DSLR camera. And I don't wanna pick a company that I wouldn't be satisfied with in the end. Can anyone who does photography and has experience to give me your opinions and reasons on which company you think I should go for.

Fisheye Lens For Nikon? - 1

I want a cheap non vignetting fisheye, I found one by rokinon for about 280$ which so far is the cheapest and that's a decent Price for this type of lens. Just wondering if you know of any other lenses and don't say the Nikon 10.5 mm cuz that's way to expensive for me 300 and lower

Which camera to buy in India?

My Budget is maximum Rupees Seven thousand. Please suggest me best digital cameras to buy in india. Which is best like Nikon or Canon or Sony digital camera or any other?
I also heard that Kodak is not good.

Black room. Developing photos. And Nikon F photomic?

I'm trying to figure out if once you learn how to use it could a Nikon f photomic be better than a Cannon power shot A620? I heard that once you learn how to use it and develop them you can get good pictures is that true because i wondering how a very old camera can be better than digital. And what exactly is a black room? What do you do in one? And where can i find one? And do all the photos turn out black and white? Why is the room red? Sorry i don't know anything about this and am curious.

How to get a Nikon Digital Camera off of the Bulb setting?

I just put on a macro lens and no matter what I do I can't get the shutter speed off of the Bulb setting. I have tried different modes and everything.

Does nikon cameras have a thing in them to detect if it has fallen?

I dropped my camera and now the lens won't go back in and won't turn one there isn't any physical damage and the store won't take it back, but i don't wanna send it to nikon if they can tell its been dropped.

Added (1). First off the lens isn't out of alignment it looks normal it just won't go in, and it was on the table and it got knocked over so the strap wouldnt have helped! But thanks anyways for the help!