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01-13-2009, 09:03 PM   #1
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Before I Blow a $1000.oo

I was wondering want people think about getting a new lens. I have the Tamron 17-50 f2.8 and the Pentax DA*50-135 f2.8 and I want something longer for traveling around the USA (By Car) so I'll have all my gear at hand. Which lens would you select?
Sigma 150-500mm f/5-6.3 DG HSM APO Autofocus Lens for Pentax $880.oo

Sigma 50-500mm f/4-6.3 EX DG Autofocus Lens for Pentax $1030.oo

I guess I need a little prodding in the right direction. They are so dam close in IQ but the 150-500 has the HSM and Sigma has no release date on the 50-500 HSM or if they are even going to make one. And the 150-500 is a little better at 500mm. I guess I'm looking for a pole.

Thanks Everyone for putting up with me the past 2 years also but this is a big decision.
Jack

01-13-2009, 09:25 PM   #2
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You can go to the other forum and search for this thread:

" 500mm tests using 4 lenses on K20D "


500mm tests using 4 lenses on K20D. [Page 1]: Pentax SLR Talk Forum: Digital Photography Review


Somebody compared 50-500 vs 150-500 vs 170-500 vs A*300.
01-13-2009, 09:31 PM   #3
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QuoteOriginally posted by Fl_Gulfer Quote
I was wondering want people think about getting a new lens. I have the Tamron 17-50 f2.8 and the Pentax DA*50-135 f2.8 and I want something longer for traveling around the USA (By Car) so I'll have all my gear at hand. Which lens would you select?
Sigma 150-500mm f/5-6.3 DG HSM APO Autofocus Lens for Pentax $880.oo

Sigma 50-500mm f/4-6.3 EX DG Autofocus Lens for Pentax $1030.oo

I guess I need a little prodding in the right direction. They are so dam close in IQ but the 150-500 has the HSM and Sigma has no release date on the 50-500 HSM or if they are even going to make one. And the 150-500 is a little better at 500mm. I guess I'm looking for a pole.

Thanks Everyone for putting up with me the past 2 years also but this is a big decision.
Jack
One of the reasons I've avoided Sigma is that they tend to charge the same for a Pentax mount lens as they do for other mounts, even though their Pentax mount lenses lack an HSM. This seems like quite a rip-off.

Last edited by asdf; 01-13-2009 at 09:53 PM.
01-13-2009, 10:12 PM   #4
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If it were me, I'd get the Pentax DA* 300mm or the Sigma 100-300mm f4. In fact, when I made my long lens choice recently I did get the Sigma 100-300mm f4. However, I would probably choose the DA* 300mm if I were to make the choice again. Couple it with a 1.4x TC and it makes a 420mm 5.6 lens, or a 600mm f8 with a 2x TC.

01-13-2009, 10:39 PM   #5
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DA* 300mm. Very nice lens.
01-13-2009, 11:14 PM   #6
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Get the DA*300 and a TC. 300mm is a more flexible length than 500mm and the DA*300 is a better lens and it's weatherproofed. You can put the TC on when you need the extra length.
01-14-2009, 12:26 AM   #7
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Another vote for the DA*300mm here for the reasons mentioned above and... you've already got a zoom to take you to 210mm and a 200/4 prime. And for a travel lens, I have a feeling you'll find either of the Sigmas heavy at 4lbs; the 300 is "merely" 2lbs.
01-14-2009, 04:03 AM   #8
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What happened to your DA 55-300? Damn fine lens and with a 1.4x, gets you mighty close.

Jason

01-14-2009, 04:19 AM   #9
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I was very amused at how small, light and well-built the DA* 300 was
01-14-2009, 07:47 AM   #10
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QuoteOriginally posted by asdf Quote
One of the reasons I've avoided Sigma is that they tend to charge the same for a Pentax mount lens as they do for other mounts, even though their Pentax mount lenses lack an HSM. This seems like quite a rip-off.

The Sigma 150-500 has
The HSM (Hyper Sonic Motor) system ensures quiet and high-speed auto focusing with full time manual focus override.
Three Special Low Dispersion (SLD) elements provide excellent correction for chromatic aberration.
Super Multi Layer (SML) coating reduces ghost and flare.
In PENTAX Mount
01-14-2009, 07:52 AM   #11
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I didn't think anyone made a AF teleconverter for SDM or HSM, everything is manual.
01-14-2009, 08:37 AM   #12
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I believe the Tamron PZ-AF MC4 1.4x Teleconverter is compatible with SDM, from what I read on here.

tamron 1.4x teleconverter pentax, Cameras Photo, wii items on eBay.com

QuoteOriginally posted by Fl_Gulfer Quote
I didn't think anyone made a AF teleconverter for SDM or HSM, everything is manual.
01-14-2009, 03:42 PM   #13
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I'm just going to lay my thoughts out on the two here so forgive the rambling nature of the post.

It's quite a tough choice between the two. Having had the bigma for a while I've found I do use the 50-150mm range a lot more than I expected to, and I'd miss it if it wasn't there. Then again I expect this is because the only other lens I have that covers the same range is the DA50-200 and the bigma has substantially better IQ as you'd expect. Since you've got the DA*50-135 already it's not such a compelling argument for you.

Once you concentrate on the rest of the range things favour the 150-500 a bit more - the IQ of the two lenses is very close from the comparisons I've seen so there's no compelling argument to make one the obvious choice. The 150-500 is also a bit faster at the long end (f/6.3 rather than f/6.7) and has HSM as a nice bonus. On the other hand the bigma has the EX designation which in the UK at least means you get a 3-year warranty rather than the usual one year. I've never seen the 150-500 in real life so I can't comment on the comparative build quality - I know Sigma is only designating constant aperture lenses as EX now but I don't know whether that means they built the 150-500 to the same standard as the bigma or not.

If I had your current set of lenses I think the sensible choice would be the 150-500 since I don't think you're giving up anything you'd miss too badly and what you get in return more than makes up for it. If something happened to my bigma and I was faced with the same choice I'd probably get another bigma since it fits better with how I use it.

As a note to all the recommendations for the DA*300 and a TC, yes it's the better lens at 300mm (if I was rich I'd buy one as well! ) but given the OP has a 200/f4 and asked after zooms makes me think that perhaps the convenience offered by the two sigmas is perhaps more important than having the absolute best lens for one focal length. It's not like the sigmas are bad lenses after all!
01-14-2009, 03:58 PM   #14
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I just went and bought a Tamron PZ-AF MC4 1.4x Teleconverter and I'm going to test it on my 50-135 and if it works I'll get the 150-500. The DA*300 wasn't a lens I was considering.
Thanks everyone
Jack
01-14-2009, 06:15 PM   #15
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I guess the real question is, how much time will you spend at 500mm?

If only 400mm is what you need the sigma 100-300 F4 may be better, and you can add a 1.4x TC and still get AF to work.

I have a sigma 70-200 F2.8 anad both the 1.4x and 2x TCs.

THe basic idea is that I get F2.8 all the way to 200mm, add the 1.4 and I get 300 F4 and add the 2x and I get 400 F5.6.

I have posted photos with the 2x and they are excellent.

the advantage for me, and I don't have a 50-135 already, is F2.8 down to 70mm. It is a better fit for me personally and even with the 1.4x, is F4 at 100mm. THis is faster than the BIGMA or the 150-500 at these focal lengths, and if you don't need the maximum often, you may be better off to add a high quality TC to a very fast high qualty prime.

ps, for 500mm I have a SMC 300 F4 and 1.7x AF TC
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