To me you seem to be in the same position I am - that is most ranges are well covered but now it's time to slow down, save up, and buy better quality lenses i.e. * lenses.

The Pentax 60-250/4 would blow away your Sigmas and fits your budget perfectly (though I would always go Used anyway).

Ha ha - hopefully the wife won't notice !

If I think the light is going to be really bad ... and impossible to use flash, then I'll take the 50/1.4 for the extra half stop. However I am still in the process of evaluating the difference and haven't reached a conclusion yet !

I have both the FA50/1.4 and a 43 Ltd. Both lenses get a lot of use, both are excellent.

You don't give your budget so although you mention 'cheap' that could have many interpretations. So I'm going to assume you have a little more for lenses than has been assumed so far.

1. Pentax DA 55-300 : wonderfully sharp and useful zoom for the price. Alternative Tamron 70-300, not as sharp, more CA but still very good and offers a real 1:2 macro too. ca. $100 (GBP60).

2. FA 50/1.4 cracking lens for the price. Alternative - if you don't mind going manual then the SMC Takumar 50/1.4 is an excellent lens for very little money.

3. Reversing ring - as has been mentioned ! True macro for a fiver.

Good luck !

My wife has just found our bank statement

Pointedly remarking on numerous EBay 'wins' Oops I shouldn't look happy should I ? I remarked that the last and largest of them was a package of 4 lenses and a camera and that by selling the camera and lenses I don't want, the 2 lenses I really wanted worked out at well under market ... she wasn't convinced, or even close.

She hasn't found my kitty for the K5, 18-135 and 60-250 yet thank goodness !

I have the 10-20 and love it. It's a great lens that lends itself to many different situations and uses.

I'm sure one of my most used lenses and the only downside is the distortion that can appear at 10mm - of course this can be corrected with the right plug-in in LR and maybe Aperture 3 thought I'm not sure - there may or not be a profile to correct the distortion, a good reason perhaps to go for a used 12-24 instead) ?

Got one of these and quite like it - nice range for walkabout. Mine has a rough zoom but doesn't impede shooting. Excellent lense for the money.

I have the Sigma 18-125 (versatile lense but not the greatest IQ - passable though. Never use it nowadays). I have the Tamron 70-300 (sitting in the cupboard too - has a very useful macro setting 1:2 that works very well if that is ever of use to you), I had the Pentax 80-320 (easily the worst of the bunch but still decent) and now use the Pentax 55-300 which is a step beyond any of those above and much better control of CA as well as being sharper - no question.

If you are on a budget then sell the 18-125 for whatever you can get for it, then buy the 55-300, it is a fantastic lense for the price and as suggested you can easily pick up a used 18-55 kit lense for peanuts and it is not a downgrade from the Sigma you have now, most people seem to be happy with it as a kit lense. You then have 18 - 300 covered by good lenses.

I have both the FA 50/1.4 and the 43/1.9 Ltd ...... and the 50 is on the camera more than the 43.

Only half a stop difference but that means you can shoot at 2.0 and it's sharp ith great bokeh. For the money no question. I love both but unless you are loaded go for the FA 50 and put the rest towards another great lens.