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08-28-2011, 06:54 PM   #16
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No, I haven't personally tried the Pentax 50-135mm, but from what I've gathered IQ is similar and excellent among all the f/2.8 lenses in that class (50-135mm, 50-150mm, and 70-200mm). So more consideration should be given to things such as desired focal length range, weight, size, autofocus speed/accuracy, reliability/warranty, cost, etc.

I'm still working on getting some samples together.

08-28-2011, 09:31 PM   #17
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Okay, here are some samples from the Tamron 28-75mm f/2.8 on my Pentax K-x. All of the portraits were shot in my home studio with Paul C. Buff "White Lightning" strobes and an aperture around f8.0, give or take a stop.

The two eBay items were shot using the strobes' modeling lamps as hot lights.The Behringer mixer was shot at f2.8, and the teapot was shot at f5.6.

Click on each picture to view the full-size image. Some of the images have had some cropping, but none of them have been resized. The pictures were shot as RAW, and developed in Photoshop, with just a tiny bit of sharpening applied.





















08-29-2011, 04:59 AM   #18
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wow. these photos are amazing. razor sharp when I zoom in.. so don't you think I need more than 75mm focal length for outdoor portrait? which lens to you recommend in addition to this one? ( pentax 50-135 tamron 70-200 (too heavy ) sigma 70-200 ( not as good IQ as the other 2 )

Derek
08-29-2011, 06:12 AM   #19
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The 28-75mm will get you by outdoors, but a longer lens would be better. You mentioned shooting in a studio, and that's where you'd want the 28-75mm.

For outdoors, I would recommend the Sigma 50-150mm f/2.8. Excellent image quality, slightly longer reach than 50-135mm, smaller than 70-200 (about equal to 50-135mm in size), and silent, fast HSM autofocus (faster than the 50-135mm SDM). Plus, it has a much longer warranty than the Pentax 50-135mm.

I don't have time now, but tonight when I get back from work I'll try to post some pictures from my Sigma 50-150mm.

08-29-2011, 08:46 AM   #20
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50-150 Sigma discontinued for Pentax..any recommendation?
I don;t know if I you noticed but I also have Sigma 17-70 which I don't think the photo I get from it is as sharp as you got with your tamron..so If I get that tamron, then i have 2 lenses which would overlap alot..
Looking forward to seeing your photos.
08-29-2011, 10:19 AM   #21
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ordered tammy 28-75 today..
08-29-2011, 06:19 PM   #22
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Congratulations! I hope you enjoy yours as much as I've enjoyed mine. Maybe you've already seen it, but in case not, here's a thread I posted a while back with a bunch more pictures I've taken with my Tamron 28-75mm:

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/145599-tamron-...lots-pics.html

And I'm still planning on posting some samples from my Sigma 50-150mm, but I just got home from helping a relative move all day, some I'm probably just gonna take a shower and collapse on the couch for the rest of the evening (assuming the kids let me!)
08-29-2011, 08:35 PM   #23
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Thanks pictures look amazing. Looking forward to getting mine.. I called Sigma and they said the new 50-150 won't be made for Pentax and Sony. what do you recommend now?

08-30-2011, 04:27 AM   #24
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The new Sigma 50-150mm is kind of a joke, since it's every bit as big as the 70-200mm lenses. It's a shame they discontinued the old one. If it were me, and I couldn't get the discontinued 50-150mm new, I would watch eBay until one popped up. You can setup a "saved search" on eBay, and you'll get an email when one is listed.

The Pentax 50-135mm is a very good lens, but I've heard that the Sigma 50-150mm focuses much quicker than the Pentax. If autofocus speed isn't an issue, you'll probably be happy with the 50-135mm. I would just make sure to buy an extended warranty, since it only comes with a one year warranty and a lot of people don't trust the SDM motor.

This place in New York is still showing the discontinued Sigma 50-150mm in stock for Pentax:

Sigma 50-150mm f/2.8 II EX DC HSM Lens for Pentax APS-C Sensor Cameras
08-30-2011, 08:34 AM   #25
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I don't have too much in the way of samples from the Sigma 50-150mm in the studio, since I've only used it in the studio once. I found it a little long for studio work, but I was very happy with the image quality. Here's one of those shots, captured at f/7.1 (click for full size):



I've had the lens for almost a year, and have been delighted with it. I'm working on getting together some of my favorite shots from the 50-150mm, and may start a separate thread for them.
09-04-2011, 05:01 AM   #26
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QuoteOriginally posted by Edgar_in_Indy Quote
The new Sigma 50-150mm is kind of a joke, since it's every bit as big as the 70-200mm lenses. It's a shame they discontinued the old one. If it were me, and I couldn't get the discontinued 50-150mm new, I would watch eBay until one popped up. You can setup a "saved search" on eBay, and you'll get an email when one is listed.

The Pentax 50-135mm is a very good lens, but I've heard that the Sigma 50-150mm focuses much quicker than the Pentax. If autofocus speed isn't an issue, you'll probably be happy with the 50-135mm. I would just make sure to buy an extended warranty, since it only comes with a one year warranty and a lot of people don't trust the SDM motor.

This place in New York is still showing the discontinued Sigma 50-150mm in stock for Pentax:

Sigma 50-150mm f/2.8 II EX DC HSM Lens for Pentax APS-C Sensor Cameras
just saw your post. thanks. apparently they no longer have it.
as far as Pentax, I was thinking of the same thing buying extra 2 year insurance which adds another $250 to the price.
09-04-2011, 07:26 AM   #27
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QuoteOriginally posted by dr_romix Quote
as far as Pentax, I was thinking of the same thing buying extra 2 year insurance which adds another $250 to the price.
Not sure if you are talking about $250 being the cost of just insurance alone. Insurance should not cost that much. For some reason, the cost of insurance for the same product seems to vary at different times. Last year when I bought my 50-135 This was a 7 year warranty from Adorama. Mack is a third party insurance but has been around a while though I cannot vouch for it:

SKU Brand Product Qty Price Total
-------------------- ---------------------------------------- --- ----------- -----------
PX50135AFD Pentax SMCP-DA 50-135mm f/2.8 ED (IF) SD 1 $799.95 $799.95
CZW7L29 Mack 7 Year Warranty for Lenses Valued $ 1 $34.95 $34.95
----------------------------------------------------------------- ----------- -----------
Subtotal: $834.90
09-04-2011, 07:42 AM   #28
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I can vouch for Mack Camera warranties. I bought a used Panasonic PT-AX100U projector off eBay for a little over $300 a couple years ago, and the original owner had bought a Mack Camera extended warranty for it. I was able to transfer the warranty to my name, and Mack even waved the $20 transfer fee. When I got the projector, I noticed that it had some discoloration on parts of the screen when a white scene was displayed. I sent it in to Mack, and they determined that it was beyond repair. They offered to replace it with the current model, the PT-AX200U, or send me a check for $1000, the cost of a new PT-AX200U. I opted for the check, and I received it a few weeks later.

So the 3rd party warranties may not be quite as convenient as an in-store extended warranty, but, at least in my experience, Mack Camera stood behind their warranty.

Here's a link to Mack's website showing the lens warranties they offer:

Mack Camera & Video Service

Warranty part # 1017 covers lenses under $1000 for 7 years
Warranty part # 1013 covers lenses under $5000 for 3 years

Here's a link to the 7 year warranty on Amazon for $19.95:

Amazon.com: Mack 7-Year Camera Lens Extended Warranty Service Plan: Camera & Photo

And here's a link to the 3-year warranty for $14.39:

Amazon.com: Mack 3 Year Warranty Extension for Professional Lenses under $5,000: Electronics

Like I said, their warranty worked for me, but that's just one case. But for $15 or $20 bucks, it's probably not too much of a risk. If you're a pro who must minimize your down time, then you probably won't be happy with the turnaround time. But if you're just a hobbyist who can't afford to spend a lot on repairs, then it's probably a good idea. As long as your lens still has at least 90 days of the original manufacturer's warranty, you can buy a Mack extended warranty.

Last edited by Edgar_in_Indy; 09-04-2011 at 08:11 AM.
09-04-2011, 08:19 AM   #29
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I just took my own advise, and bought the 7-year extended warranty for my Sigma 50-150mm that I bought last year. Sigma EX lenses in the US come with a 1 year warranty, that is automatically extended to 4 years when you register your lens with Sigma. Non-EX lenses are extended to 3 years of warranty coverage with registration. So now my 50-150mm will be covered for a total of 11 years.

If you haven't registered your Sigma lens yet, make sure you do so in order to get the longer warranty. I just registered mine, and here's a link to the registration page:

Sigma - Service - Register your new Sigma
09-07-2011, 10:24 AM   #30
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QuoteOriginally posted by dr_romix Quote
just saw your post. thanks. apparently they no longer have it.
as far as Pentax, I was thinking of the same thing buying extra 2 year insurance which adds another $250 to the price.
Hi! My name is Desiree and I am the Customer Relations Supervisor for Mack Camera. Please let me know if I can answer any specific questions regarding our warranties. I can be reached via email at helpdesk@mackcam.com. Good luck!
Thank you,
Desiree
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