Help!!

Hi Everyone

Is there anyone out there that can help me understand what ED,IF,DA,SDM,LD,AF,Di and any other letters mean after the f/stop on a lens please?, or where this is all explainied because I havent got a clue! :

A few definitions are here:

www.bdimitrov.de/kmp/technology/lens_terms.html

The rest:

AF = Auto Focus

SDM = Supersonic Dynamic Motor (motor built into lens)

DA = Digital Auto (I guess)

Tamron's "Di" just means the lens has coatings suitable for use with digital cameras. LD = Low Disperson.

Thanks Icebreaker

What fish eye lens would you recommend?

Also, apart from Pentax lenses, what other manufactures fit and what shall I look out for?

I can't exactly recommend a fish eye lens - cos I don't have one myself - but apparently the Pentax 10-17mm is very good. Search the forum for more info on that and others.

Also consider a Pentax 12-24mm or Sigma 10-20mm if you fancy ultra wide but without the the fish eye effect.

The big three independent manufacturers for Pentax-fit lenses at the moment are Sigma, Tamron and Tokina. They all produce high quality stuff.

Loads of older lenses from other manufacturers are on the second-hand market - some very obscure. Some might be rubbish, some can get jammed on a modern camera! So do your research before buying one.