Limited Offers on Converter All Nikkor Below
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 FishEye Macro Combo Lens for Nikon Nikkor 24mm f 28  US $39.95
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 Fish Eye Wide Macro Lens for Nikon Nikkor 18 70mm US $39.95
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 FishEye Macro Combo Lens for Nikon Nikkor 28mm f 28 US $37.95
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 Wide 045X FISHEYE LENS 52mm for Panasonic DMC FZ7 FZ30 US $39.91
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 Fish Eye Wide Angle Lens for Nikon Nikkor 18 135mm Lens US $39.95
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 52mm Wide Angle Macro LENS for Nikon D50 D60 D70 D100 US $37.94
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 Nikon TC 16A AF Teleconverter EX Boxed US $185.00
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 NEW 42x Wide angle Converter for Nikon D60 18 55mm US $39.95
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 FishEye Macro Combo Lens for Nikon Nikkor 50mm f 14 US $39.95
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 FishEye Macro Combo Lens for Micro Nikkor 55mm f 28 US $39.95
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 Wide Angle 045x LENS for Panasonic DMC FZ7 FZ5 FZ3 New US $37.94
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 Wide Angle 52mm front cap for Canon EOS 20D 30D 40D US $28.74
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 Wide Angle FISHEYE LENS 52mm for Canon EOS 40D 30D 20D US $22.94
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 2X Teleconverter end lens for Nikon Digit SLR D300 D200 US $129.95
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 NIKON AF S NIKKOR 17 35MM 28 D DC DC CONVERTER NEW OEM US $84.00
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 Nikon Fisheye Converter FC E8 21X US $79.00
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 VIVITAR 2X AF Tele Converter for ALL NIKKOR NIKON ZOOM US $119.00
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 72mm High Definition 20 X TELEPHOTO Lens For Nikon SLR Cameras US $63.17
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 WIDE ANGLE FISHEYE LENS FOR NIKON Digital SLR D60 D80 US $39.99
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 2X Telephoto lens to fit all Nikon Digital Nikkor zoom US $109.95
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 WIDE ANGLE FISHEYE LENS FOR NIKON D70 D70S D60 D80 US $39.87
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 WIDE ANGLE TELEPHOTO LENS SET for Nikon D3000 D5000 NEW US $40.91
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 HQ Tele 45x Wide 040X Lens For Nikon D5000 D3000 D2X US $138.91
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 HQ Tele 45X Wide 040X Set ForNikon D50 D70 D2X D200 US $138.91
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 PRO 2X Teleconverter end lens for Nikon Digital SLR D80 US $129.95
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 2X AF TELECONVERTER LENS FOR NIKON DIGITAL OR FILM SLR US $129.95
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 2x TeleConverter Nikon for Digital D70s D2x D50 D80 NEW US $129.95
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 2x Teleconverter Lens for Nikon D90 D40 D50 D60 D70 D3S US $129.95
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 2X AF Tele Converter for ALL NIKKOR NIKON AF SLR ZOOM US $129.95
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 LENS 2x TeleConverter for Nikon D70s D2x D80 D40 40X US $129.95
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 PRO 2X AF double zoom Teleconverter Lens for Nikon Nikkor AF SLR Digital Cameras US $109.95
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Are Adapter/Converter Lenses worth it?
I am an aspiring photographer, and I am looking into expanding my collection of lenses. I keep coming across these Adapter/Converter lenses that apparently convert an existing lens into a Macro/Wide-angle/fish-eye lens.
They cost anywhere from $8.00-$100.00, which is clearly WAY cheaper than a Nikkor 12-24mm at $1400.00, or example.
My question is: Do they really work? A part of me cant imagine how an $8.00 lens attachment would produce a quality photograph. I've read that wide angle attachments will likely blur the outside corners of the photograph. Is that true?
Do they change how any of the functions work (auto-focus, etc)?
I do realize that you generally have to buy another sort of adapter ring in order to attach any given converter to one of your lenses.
Any opinions/input/experiences would be greatly appreciated!
Oh, if it is at all relevant: i use a Nikon D90
There are some filters that will degrade your pictures and some that will not.
wide angle filters will degrade your image and yes, cause blurring around the outside. they may also mess with your auto focus because you are adding more glass between your sensor the outside world, and these filters will usually 'eat' tiny amounts of light. you wont notice from your viewfinder, but you will when your autofocus starts trying to work.
macro filters or 'extension tubes' are great on the other hand! they do not contain any glass or optics in them. they only add empty space between your camera's sensor and the lens. This means that it will not degrade your optics, so the picture will be as good as the lens you are using it on. Although these extension tubes do mess with autofocus a bit, but most macro photography involves stationary cameras with very very finely tuned Manual Focus adjustments. i use a set made by kenko. they come in 3 lengths. the longer the length the more 'macro' it becomes.
also for tube lengths - do not use a tube with a mm length that is longer than the lens you are using. (with a 50mm lens do not add 60mm of extension, or it will cause your focus points to be INSIDE of your lens. it is a very strange effect when you can focus on the minute dust and scratches that are on the outside of your lens)
in short; i love my extension tubes and use them all the time, but when i purchased a fisheye (or wideangle) filter, i sold it not more than 4 months later because for me, image quality comes first.