18-125??

Hi, I am looking at purchasing a wider range zoom lens to take on holiday with me. I am traveling for 6 months, so want a versatile lens that won't take up loads of space. I was hoping to get away with only one lens. I thought that something along the lines of a 18-125 would be good, but I can't seem to find anything in this range in a pentax fit. Do they make them?? I have thought about the sigma 18-200, but was unsure if the quality sacrifice was too big. What are peoples thoughts on this?? I only have a kit 18-55 lens at the moment.

Thanks for your help.

Pentax and Tamron have an 18-250, which seems to give good results, and would be my ideal travel lens if I could only take a single lens with me.

Unless I was going on a photographic 'holiday', I wouldn't dream of taking an SLR with me - what a nighmare! if you are going to saddle yourself with a single 'do it all' lens, then there's almost no point in luggging a huge camera around with you. Compromise, and get a bridge camera with a wide ranging lens 10 to 12 x zooms are common and they all go quite wide.
Or better still get a top quality waterproof pocket digital and never be without it, (easy to hide too).

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I have the Sigma 18-200 and I have not been disappointed with it, I bought it to replace the kit lens and give me a general usage lens that was not going to brake the bank. I compaired it with the Tamron and went for the Sigma because it had snapier and quiter focus. It also works very well with my Kenro 1.5 teleconverter.

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Bodies: K5IIs, K7, MZ5n, LX, MV
Lenses: DA*16-50, DA18-55WR, DA18-135, DAL35, M50 F2, A50 f1.4, FA50 f1.4, DA*50-135, DA55-300, Tamron 70-300, DFA 100 WR Macro, M135 f3.5, Sigma 120-400 APO DG HSM, Tokina 500 f8.0
Flash: Metz 58, Metz 48
Accessories: BG4, Pentax right angle finder, Pentax mirror adaptor lens, O-ME53 Viewfinder Loupe
Auto 110 System: Auto 110, Winder, 18mm, 24mm, 50mm, 70mm, 20-40mm, AF100P, 1.7x telecon

I agree I have read some good reports on this lens I have the 70/300 and have some lovely photos from it as well.

I have a Tamron AF Aspherical AD SP 24-135mm f3.5/5.6 and find it a great lens for general use.

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Sigma makes the 18-125mm and Pentax a 18-250mm (a rebadged Tamron). At first I was very sceptical about the DA18-250mm but 3 weeks ago I bought one and have not been disappointed. It is quite sharp, but be prepared for some vignetting which can be photoshopped away.

I don't think the Sigma 18-125 comes in Pentax mount . I use a Tokina 28-105 which I've been quite pleased with

Ohhh, just seen Chris's email from SRS saying that the Sigma 18-125 for Pentax will be in shortly - I take it all back