[harasdw]

Hi, I'm totally new to this, avoided chat rooms like the plauge and then I got a d50, can hear the kids chortling in the background....

I got the d50 with a nikon 18-50mm lense and went out and bought a tamron 70-300mm f4-5.6 with 1:2 macro. both are excellent, however I want something that I can use with the 18-50mm to bring it down to 9mm for wide angle images and then I want a converter to increase the 300 to 600mm.

The other lens's I'm looking at are the Tamron 90mm DI macro and Sigma 105mm f2.8 ex dg, I'm a jeweller and silversmith and need the shorter focusing distance for my improvised copystand to capture images of my work.

So how do I find out if the lens I've got and will get will be ok with a converter? I've looked in my manuals, couldn't see anything in there, checked out info online but it just blagged my head with science, can any one help please?

[Steve]

Moved to the correct section for you, I am sure one of our Nikon users will be along soon to offer some advice

[silkstone]

Not a Nikonian I'm afraid, but I can guess that your 70-300 will not give autofocus with a 2x teleconverter. The TC will add two stops to the effective maximum aperture - f/5.6 will become f/11 - and I can't see any AF system liking that because there won't be enough light for it. You should still be able to focus manually though.

[Dave]

Hi & welcome to Pixalo

Fair few people have opted for dedicated wide angle lens to get 10mm, with the Sigma 10-20mm lens . Link here :- http://www.pixalo.com/reviews/showpr...duct/60/cat/14

or are you after something like this ? WIDE ANGLE FISHEYE LENS FOR NIKON Digital SLR D40/D50 - (eBay item 300154546630 end time Sep-30-07 16:06:46 PDT)

Re trying to get to 600mm , note with the crop factor of the cameras sensor , this would be the equivalent of 900mm in old 35mm SLR days That's gonna need a tripod to stop camera shake showing & as stated by Silkstone, shooting at f/11 is going to need a pretty bright day to get anywhere near a shutter speed that is useable.

[harasdw]

oaky doke, thanks

[VinnyP]

For the 300 5.6 I'd only go for 1.4x that will still give you 420 at the long end a 35mm/FX equivalent of over 600mm. The Kenko Pro Plus 300DG convertors are excellent value for money. It will just about autofocus and if the light is good enough or you are happy to use high ISO then it may be able to cope. Wide angle convertors will be filter thread mounted and really are to be avoided. Sigma 10-20 or Tokina 12-24 are both excellent lenses as is the Nikon 12-24 but actually it tends to get outperformed by the Sigma and Tokina.

For Macro then you are much better off with either the Tamron or the Sigma and both are very good lenses. I have the Sigma but the Tamron has a lot of followers so I am sure you'd be happy with either.