Do I need to get new lenses if I buy a full frame camera?
I currently have a Nikon D80 and am looking to upgrade to the Nikon D800. I have a few lenses that I've been using on my D80 (35mm 1.8, 50 mm 1.8, a wide angle, and the kit lens).
All your lenses will work on the D800.
DX lenses will work on the modern full-frame bodies. Nikon full-frame bodies will recognize the DX lens and crop the image appropriately.
If you use a lens appropriate for a full-frame camera, then the whole sensor area will be utilized.
Nikon lenses have a "DX" emblem on the top of the lens to signify they are for crop-sensor bodies.
You don't give enough info about your lenses, but if you're using Nikon lenses:
50mm f/1.8G and D: FX (full frame)
35mm f/1.8G: DX
35mm f/1.8G-ED: FX
Wide angle: who knows, you don't give any details.
Kit lens: Most likely a DX lens. Kit lenses are commonly 18-55, 18-105, or 18-135 for that era of camera. None of these are considered high quality. But, they will work and you can still take impressive images with these lenses if you know what you're doing.
To take advantage of the D800, you will need good quality glass as the resolving power of the sensor is pretty phenomenal. The 35 and 50mm lenses are high quality lenses. The kit lenses will fall short of the system's full potential. The wide angle is an unknown.
When you jump to modern high pixel density cameras such as the D800, you need to spend serious money for lenses to make the most of the total system. You can opt to look for quality older used lenses which will be more affordable. Some third party lenses offer good bang for the buck.
My 35mm f/1.8G is a DX lens so it would give a reduced image on the D800.
My 50mm f/1.8D is an FX lens so it would fully use the sensor on the D800.
The kit lens for the D80 is most likely the 18-55mm, which is a DX lens.
You would need to give us more information about the "wide angle" lens.
Better yet, use this Nikon lens chart to see what is DX and what is FX.
http://www.nikonusa.com/...index.page
Nikon does have a new FX 35mm AF-S f1.8 lens available.
http://www.bhphotovideo.com/..._1_8g.html
However, that is probably not the one you currently have.