sigma 50-150 /pentax da*50-135


reso

Link Posted 14/07/2020 - 20:50
how does the sigma compare to the pentax
k5iis sigma 10-20 3,5 hsm pentax da 16-45 f4 tamron 17-50 2.8 pentax 17-70 f4 sigma 18-125 hsm pentax sigma 50-200 hsm os
sigma 50-500 apo dg os kenko 1.5 pz af 1.5 tele tamron pz af 2.0 tele and a flash
pentax *ist film camera

JAK

Link Posted 14/07/2020 - 20:59
I've never used either, but isn't the Pentax one renowned for SDM failures? Which is the main reason I resisted buying one!
John K

reso

Link Posted 14/07/2020 - 21:03
yes i have had two both ok but always the risk of failure
k5iis sigma 10-20 3,5 hsm pentax da 16-45 f4 tamron 17-50 2.8 pentax 17-70 f4 sigma 18-125 hsm pentax sigma 50-200 hsm os
sigma 50-500 apo dg os kenko 1.5 pz af 1.5 tele tamron pz af 2.0 tele and a flash
pentax *ist film camera

AlJones2402

Link Posted 14/07/2020 - 23:47
I had a sigma 50-150 and rate it very highly, sharp and very capable lens. Can't compare with the pentax sorry as I've never owned one.

Hope this helps.

carmagw

Link Posted 15/07/2020 - 10:03
Iíve had both.

Sigma very fast AF (compared to Pentax), sharp ,slightly cooler colours. No weather sealing but never had problems. The out of focus areas were not as smooth as the Pentax and could look rather messy with the wrong background. I could use the Sigma for running events with individuals coming towards me, I could not do this with the Pentax as I would miss too many spontaneous moments due to AF. Now use Nikon for these events and sold the Sigma to reduce my lens collection. Sigma has slightly longer reach.

Pentax, moderate af - found it annoying when I was trying to focus on My kids coming towards me or running events as above. Love the colours and out of focus areas, sharp as well. Weather sealed. Something about the pentax that I love, portraits looked better to me, colours/rendering.

Iíve kept the Pentax although it doesn't come out very often, never had SDM problems with it but did convert to screw drive to see if AF speed improved, may have done slightly but converted it back to sdm as preferred silent AF. Prefer feel of the pentax in the hand (from memory slightly bigger (especially with hood) and heavier.

If I was shooting one system I would have kept the sigma as well for the times a faster AF was needed.

Regards

Mike-P

Link Posted 15/07/2020 - 15:00
Have had both multiple times, ended up keeping the Pentax.

Sigma has fast af, HSM is better than SDM and it's sharp at f/2.8. Pentax has slow AF, SDM isn't as good as HSM, it's WR and it's very very sharp at f/2.8. It also renders much better than the Sigma.

Not sure it's me but on every Sigma I have had (not just the 50-150mm) you can set up the focusing on the Pentax body and it will be absolutely spot on. Go to use it the next day and it's slightly out. Really Really annoying.
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redbusa99

Link Posted 15/07/2020 - 16:30
i have the Sigma and find it a very good lens but on a personal note i struggle to find much variety of subjects to use it with. went for it over the Pentax due to the bad SDM record it has, downside to the Sigma is that Sigma no longer support the lens so will not repair it shoud it go wrong, whether a third party would be able to repair i don't know.
K3 II and the odd lens or 2

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redbusa99

Link Posted 15/07/2020 - 16:32
meant to add this,
https://www.flickr.com/photos/haywagon200/albums/72157679472569038
K3 II and the odd lens or 2

Flickr

reso

Link Posted 15/07/2020 - 19:28
Thank for all the post,s now to decide
k5iis sigma 10-20 3,5 hsm pentax da 16-45 f4 tamron 17-50 2.8 pentax 17-70 f4 sigma 18-125 hsm pentax sigma 50-200 hsm os
sigma 50-500 apo dg os kenko 1.5 pz af 1.5 tele tamron pz af 2.0 tele and a flash
pentax *ist film camera
Last Edited by reso on 15/07/2020 - 19:30

mr.mellow

Link Posted 16/07/2020 - 09:44
Iíve had the Pentax 50mm-135mm lens since 2007 and never had a problem with the SDM. Last used it on the 14/7/20 and still very happy with it. Sigma did repair my 120mm-400mm HSM lens when the HSM failed, Sigma did not make the lens at the time but had the spares for it. The cost was about £125 for a new HSM and service.
The older I get the faster I was.
Dave
K-3 II, K10D, DA16-85, DA*50-135, DA12-24, DA18-55, DA 50, Sigma EX DG 70mm Macro, Sigma 70-300mm, Sigma DG 120-400mm APO HSM.
Metz 58 AF-1.

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Nigelk

Link Posted 17/07/2020 - 11:28
Sadly I can't compare the two. I have the Pentax and consider it a truly lovely lens worthy of its *. I bought secondhand some years ago and so far not had any SDM problems with this lens. Its speed of focusing is leisurely by modern standards maybe but, reliable in my experience.
Last Edited by Nigelk on 17/07/2020 - 11:29

fatspider

Link Posted 17/07/2020 - 12:36
I think the SDM issues are hit and miss anyway, I had the 16-50 and 50-135 since 07 or 08 and never had any issues, I dropped my K10D with the 16-50 about 3-4 years ago and the insurance replaced them both despite the lens seeming OK, Unfortunately the replacement 16-50 went belly up in warranty and again about 6 month out of waranty, I converted it to screw drive and found it much faster than SDM, with scaling down my kit the 16-50 has now gone but the 50-135 remains for the moment without problems (finds wood to touch), I can't comment on the Sigma but I'd rate the 50-135 as one of the best lenses I've ever owned, the focus is slow but if I was bothered about speedy AF I'd have bought Canon or Nikon (sorry about the foul language)
My Names Alan, and I'm a lensaholic.
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Last Edited by fatspider on 17/07/2020 - 12:40

fatspider

Link Posted 17/07/2020 - 12:41
Pentax 50-135



My Names Alan, and I'm a lensaholic.
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cardiffgareth

Link Posted 20/07/2020 - 09:35
I've had the Pentax and found the AF not fast but it was sharp and rendered lovely. Never had SDM issues with it. I suppose it depends on what you're shooting
Gareth
Welsh Photographer

My outfit: K1 gripped - Pentax D FA 24-70mm - Sigma 70-200mm ii HSM Macro - Pentax modified DA* 60-250mm f4 - Irix 15mm Firefly - Sigma 50-500mm - Pentax AF 540 FGZ Ii

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