Originally posted by mee
I owned and used the 10-20 for years. It is competent.. but it lacks weather sealing.. plus it is a little slower. The speed never mattered to me though since I always stopped down to f/8 or f/11 anyways since I shot landscapes with it.
I think you have to weigh what is more important to you.
Do you need this lens now? Get the Sigma
Do you need weather sealing? Wait for the Pentax
Do you need the faster aperture? Wait for the Pentax
Are you more price conscious? (total guess but.. its a DA*) Get the Sigma
Originally posted by Doundounba
Well, if you shoot outdoors the new lens will have weather sealing and if you shoot indoors it will have faster aperture. It will probably outclass the Sigma optically too. There are still many unknowns (weight, filter size, price), but for me I have the Sigma 10-20 F/4-5.6 and I find F/5.6 at the long end a little limiting. I will definitely be considering this lens and I'm still tempted by the DA15 to have a light, mind-controlling alternative...
Originally posted by pres589
You know, I want to say yes, before we've seen a single review or sample shots. Cross-frame IQ is going to be better, I think, than the 10-20. There may be times where the brighter max aperture comes in handy. The hardware quality & ruggedness seems almost assured to blow the Sigma out of the water. AF performance will probably be somewhat better.
You loose a mm on the wide end which is nothing to sneeze at. You loose two at the long end which I think will be less noticeable. I think I would have a hard time getting excited about the Sigma once this lens is available. I could see someone keeping the Sigma 8-16 after this lens shows up but a lot of the other stuff out there now isn't of much interest save for cost (assuming the buyer is shooting crop and not full frame, obviously).
Short version: I think very much so as long as you can justify whatever they want to charge.
Originally posted by robiles
i also have the 15 limited, and a tamron 10-24. after i got the limited, the tamron gathers dust. for landcapes i do not really need less than 15mm. but i live in germany where the weather is mostly bad, and this new lense would be perfect because of wr, and because of the f 2.8, i could also use it indoors.
i see these two lenses beying my entire kit because i mostly shoot wide. lets just hope i dont have to sell a kidney.
but thats just me, you might be better of with the sigma... bit that is something youb have to decide, or try. why not just buy it until the pentax gets out, and if you do not like it, sell it with a small minimal loss. you have nothing to lose
I am in no rush, really so this can wait and, of course, allowing me to get some funds as well.
Weather sealing is important because of the region where I live: wet, humid in the summer and windy pretty much year round. I also do quite a bit of winter photography, so again weather sealing would be a "must".
I tend to take the 15mm Ltd only when I am sure weather permits.
One of my daughters owns a Sigma 10-20, great images taken with that and her K3, but she doesn't use it when it's raining, too windy (dust), etc ... so I take the advice from her as well.
Thanks for the replies, folks! Appreciated !