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01-22-2014, 10:10 PM   #1
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Tamron 28-75mm f2.8 vs Sigma 18-50mm f2.8-4

Have a chance to pick up a Tammy 28-75 for a decent price that would be replacing my current standard zoom which is an excellent copy of Sigma's 18-50 f2.8-4. I can't really afford both (kinda redundant anyways) so I would need to sell the Sigma in order to help fund the Tammy purchase. No issues with my Sigma, but look forward to the extra bit of reach on the tele end. Afraid I'm gonna miss the shorter wide side and quiet HSM though. Anyone go this route and regret it? I currently don't have anything else to cover the <28mm wide angle. Sure, it gives an excuse to buy another "ultra-wide" zoom, but that would be a ways out at this time.

01-22-2014, 10:22 PM   #2
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It depends the other lenses you have or want.

For a walk-around...
Had a Sigma 18-50 2.8. Too short.
Had a Tamron 28-75. Not wide enough, and I kept backing up.

Got a used Sigma 17-70 v1 which works better as a single lens choice. However, I have other lenses to complement that one, so I am lucky there.
01-22-2014, 10:37 PM   #3
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I was wondering about that myself....

I have a chance to purchase a relatively inexpensive Tamron 28-75 f/2.8 ( < $ 400) which should be VERY sharp (full frame on crop sensor)
or
Sigma 17-70 f/2.8-4 (good reviews)
or
Tamron 17-50 f/2.8 Dii (crop sensor lens) for < $300
or
Pentax 18-135wr (its a nice lens - tried it using lensrental.com)
01-22-2014, 10:48 PM   #4
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Current lens lineup:

Pentax-A 28mm f2.8 (2nd most used lens)
Pentax-A 50mm f1.4
Sears K/R-A 135mm f2.8
Elicar PK 90mm Macro (used alot for portraits, more than macro........LOL!!!)


Wanting:
Pentax DA-AL 55-300mm
Ultrawide zoom

Wishing:
Pentax 50-135mm f2.8

01-23-2014, 12:09 AM   #5
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The difference between 28 and 18 is huge.
I also have a Tammy 28-75 and I like it , as it is sharp.
But I do find myself needing to go wider very often so I end up using my 18-135 a lot.
I think you will miss the 18-27 range.
Perhaps get a kit lens on the cheap to cover that range?
01-23-2014, 12:22 AM   #6
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My 7 year old Tamron 28-75 is a workhorse lens but a used Pentax 17-70/4 is a very versatile alternative. Its been my Santa Claus lens the past two years. Been very useful in small dance studios. Good walk around, good for portraits. Here are links to two galleries of rough edits, all with the 17-70. Santa 2013 Santa 2012
01-23-2014, 01:02 AM   #7
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I vote for Sigma 17-70, any of the versions. If I take my pursuit of feathered critters out of the equation then 90% of my shots are in that range, I agree with the others 28 is not wide enough, 50 is not long enough, when I covered that range with 2 lens I was constantly changing lens, got tired of that pretty quickly! Although the tamron 28-75 is a great lens if it suits your needs.
cheers
01-23-2014, 06:22 AM - 1 Like   #8
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Nothing against the 17-70mm, but you've gotta have 2.8 if you're shooting indoors much, so I would either stay with your 18-50mm or go with the Tamron.

The Tamron 28-75mm was actually my first "upgrade" lens, and I still LOVE it, and it would probably be the last lens I get rid of. However, it is now my studio lens (I do a lot of product photography) and its focal range is perfect there, and the edge-to-edge sharpness is ideal.

So these days the 28-75mm almost never leaves my house, but that's mostly because I have a lot of other options now to go wider or faster. I usually try not to go out with more than two lenses, and I will usually have either my 8-16mm or 30mm 1.4 for wide duties, paired with the 85mm or 50-150mm 2.8 for telephoto. But in the past, the 28-75mm was practically welded to my camera (my beloved K-x).



If you ABSOLUTELY cannot afford two lenses right now, then I would recommend staying with the 18-50mm since, as stated by others, the 28mm will have you backing into walls indoors.

However, if you still have your 18-55mm kits lens, or could afford to pick one up, then I would say go with the 28-75mm. The long end at f/2.8 will likely get a lot of use, and it's a top-notch portrait lens. It also does great as a quasi-macro lens since it focuses very close, giving you all kinds of creative possibilities. And the image quality on APS-C is really great. But when you just have to go wider than 28mm, then you just whip out the old kit lens. That's how I got by for quite a while until I could afford to expand my kit, and it worked fine.

After you get the 18-55mm/28-75mm combo, then your next goal would be to save up for an ultra-wide angle zoom, such as the Sigma 10-20mm. The 10-20mm & 28-75mm would make a WONDERFUL budget combo, and would cover practically any situation that doesn't require a long telephoto. I went for a LONG time without a ultra-wide, wondering if I would ever use it. But it has now become one of my most-used lenses.



Phase three would be to save up for a consumer 300mm zoom lens. A budget 300mm zoom lens from Sigma, Tamron, or Quantaray can often be had for $100 or less. I've owned several of them in the past (see my signature), and I did not find a significant difference in any of them. Image quality in those lenses can usually be described as "good enough" for most casual photographers. You can also find some older Pentax telephotos for very cheap, such as the FA J 75-300mm.



And a BONUS lens, which would be appropriate to add at any time, would be the old manual-focus Pentax-M 50mm 1.7. That is a wonderful lens with very nice, sharp optics and beautiful bokeh, and it can usually be found for $30 - $50, but sometimes you can get it closer to $20 if you're lucky.

EDIT: Just noticed you already have some other lenses, including the 50mm 1.4, so please disregard any extraneous advise! But I'll leave my comments intact in case anybody just starting with their lens kit ventures this way in the future.


Last edited by Edgar_in_Indy; 01-23-2014 at 06:42 AM.
01-23-2014, 06:30 AM   #9
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I also find that the Tamron 28-75/2.8 is on my camera the most. It is perfect for indoor, portraits, and most scenery. When I travel, I often start with it, and pack the DA15 Limited for those wide shots. About the only time I leave it behind is if I'm expecting rain, and then I take my 18-135WR.
01-23-2014, 06:47 PM   #10
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I went through many many of my photos exif data, and very few are actually wide angle <24mm or so. $275 for this nearly mint Tammy is just too good to pass on when so little of my shooting ia done at wide angle.
01-23-2014, 07:09 PM   #11
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QuoteOriginally posted by nms_photog Quote
I went through many many of my photos exif data, and very few are actually wide angle <24mm or so. $275 for this nearly mint Tammy is just too good to pass on when so little of my shooting ia done at wide angle.
That was also my experience. I spent far, far more time bumping into the 75mm end then I did the 28mm end. That's probably why I enjoy my Sigma 85mm so much. Enjoy your lens!
01-24-2014, 08:54 PM   #12
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Picked it up today, and just starting to work with it by taking some test photos. 1st thing was a noticeable front focus problem that I quickly corrected in the KX with debug mode. Only wish the KX kept lens profiles to make switching easier, as nearly all other lenses I have are perfect with +130 and the Tamron likes -40. 2nd is that I'm gonna need to get use to or adjust settings in order to compensate for the more vivid contrasty blue color spectrum the Sigmas are known to put out vs this lens's more natural/slightly warm feel. I'll be taking it out for a thorough test run tomorrow putting it through it's paces. But initial impression so far is excellent.
01-24-2014, 09:56 PM   #13
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Tamron 28-75 is very handy for street shots, a bit of extra reach does help and amazingly sharp lens. It's FF too in case Pentax comes up with FF.

I also had Tamron 17-50 which I used to pickup for all family vacation.
01-25-2014, 12:22 PM   #14
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My question would be - do you get better use of the 17-50 or 28-75 ?
I might just get the 18-135WR regardless as my 'outdoor daily use' lens and pick up the sharper/faster lens for those times I want some really nice shots and have time to set them up.
My old Sigma 18-200mm has seen better days, and my Rokinon 85mm f/1.4 is really good at portraits, but I don't take many of those.
01-25-2014, 03:10 PM   #15
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Put the Tamron through extensive testing today, and decided that as good as it is and as much as I like the focal length...........I'm just not very fond of the scew drive focus, and think my KX might have something wrong with it's drive motor anyways, as it seems way too loud. But IDK, cause I haven't used a screw drive auto focus lens since getting rid of the kit lenses some years back and maybe just been spoiled by the HSM on the Sigma. So, looks like this is getting put up for sale and will be on the lookout for a 17-70mm Sigma with HSM. Will also entertain trades for that particular lens as well. Stay tuned.
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