Thanks for the comments..
John, I second what Brian said and here is some info that i found on the lens..
Description - Nikon 10.5mm F2.8G ED-IF DX Autofocus Fisheye Lens
The Nikon 10.5mm F2.8G ED-IF DX Lens is targeted at Nikon DX Format digital SLR camera users who seek the unique visual effects a full-frame fisheye lens lends to landscape and other shots, to taking close-ups, or when shooting within vehicles or other tight interiors. Nikon 10.5mm F2.8G Lens excels at shooting extreme close-ups. Combining a minimum focus distance of just 3cm (1.2 in.) from the front of the Nikon 10.5mm F2.8G ED-IF DX Lens with Nikon's Close-Range Correction (CC) System ensures sharp results. The "Fisheye to Wideangle Transformation" function in the optional Nikon Capture 4 software package transforms diagonal fisheye images shot using the Nikon 10.5mm F2.8G Autofocus Fisheye Lens to ultra-wideangle photos, (by transforming the type of projection). This is an appealing new feature made possible only with digital photography and with the Nikon Total Imaging System. Optical and close-range focusing performance of Nikon 10.5mm F2.8G Lens are both optimized for Nikon DX Format digital SLR cameras. An ED (Extra-low Dispersion) glass element used in Nikon 10.5mm F2.8G ED-IF DX Lens minimizes chromatic aberration for clear, natural colors, and the rounded seven-blade diaphragm opening ensures a natural look to out-of-focus elements. This G-type Nikkor lens is designed with no aperture rings in Nikon 10.5mm F2.8G Autofocus Fisheye Lens. Nikon 10.5mm F2.8G ED-IF DX Lens operation is easy and virtually mistake-free because the aperture does not have to be set to minimum. The compact, lightweight design of Nikon 10.5mm F2.8G Lens fits comfortably in the hand. And photographers at all levels will be pleased with Nikon 10.5mm F2.8G ED-IF DX Lens outstanding cost performance.
Features - Nikon 10.5mm F2.8G ED-IF DX Autofocus Fisheye Lens
Nikon 10.5mm F2.8G ED-IF DX Lens is the first fisheye lens developed exclusively for use with Nikon DX Format*
Ultra wide picture angle of 180° on DX sensor achieved by producing a smaller image circle (the size of the image that is projected by the Nikon 10.5mm F2.8G ED-IF DX on to the sensor) enabling smaller lens diameter, lighter weight and optimal image quality from center-to edge-to-corner on the image.
Nikon 10.5mm F2.8G Autofocus Fisheye Lens is equivalent to 16mm focal length on 35mm
Minimum focus distance of 0.14m (5.5 in.), or 0.03m (1.2 in.) from the lens front, makes extreme close-ups possible with Nikon 10.5mm F2.8G ED-IF DX Lens
Close-Range Correction (CRC) provides high performance for sharper images when taking pictures up close with Nikon 10.5mm F2.8G Lens
Nikon 10.5mm F2.8G ED-IF DX Lens got extra-Low Dispersion (ED) glass element that minimizes chromatic aberration
Design of Nikon 10.5mm F2.8G ED-IF DX Lens enables a combination of wider angle-of-view with optical characteristics that are optimized for Nikon digital SLR camera sensors
Nikon D-type design provides precise distance information for flash and ambient light exposure processes
Nikon 10.5mm F2.8G Autofocus Fisheye Lens has rounded diaphragm to make out-of-focus elements appear more natural G Type DX Nikkor is designed exclusively for use with Nikon Digital SLR models
Nikon 10.5mm F2.8G ED-IF DX has Built-in Flower Type lens Hood
Nikon 10.5mm F2.8G Lens is Fully Compatible with D1, D1X, D1H, D2H, D100, D50, D70, D70S D2X, D200, D300, D2XS and other coming Nikon digital SLR cameras.
Hope this helps...
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there were many reasons why I couldn't.... I have when possible been checking out the forum and I must say it is turning out to be a fantastic place to come and see, learn & chat with some of the best local and further a field fellow enthusiasts. 
