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 Tamron SP 17-50mm F2.8 - First Impression



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March 12, 2008, 03:47:19 PM
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Offline KhoKing

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Tamron SP 17-50mm F2.8 - First Impression
« on: March 12, 2008, 03:47:19 PM »
I have the chance to test the Tamron SP 17-50mm F2.8 Lens for Pentax mount today.

Yes, the lens has hit the street in Japan, though official release date is 15th March, but I have already gotten mine for my customers. ;D

First Impression
The lens focus fast. Like the Canon and Nikon (non built in motor) version. Focus is not exactly quiet, with the usual motor/gear moving sound. Focusing ring will turn and during focusing, normal for non SDM lenses.

Sharpness?

I have some hard time testing the lens. Tested with both K20D and K200D.

On K20D, I have a hard time to get sharp photos. Initially I suspect the lens is OFF focus, but I tested TWO lenses and both show same OFF focus results.

So, I took another camera to test, the K200D.

On the K200D, again focus is OFF. Hmm...I thought there must be something which I do not understand or familiar with Pentax DSLR. I took a Pentax Kit lens and tried. Sharp, very sharp indeed. Focus was spot on.

I then notice that Pentax focusing point/area can be quiet "WIDE" and sensitive. I was using double depth testing method, with two cards (with wordings on it) one up one down (around 1cm difference). So when I focus the upper card, the bottom card should be blurred, vice versa. The cards were place close to each other, so this could be the reason that the Pentax DSLR is picking up the wrong point to focus.

So, I separated the card further, and move my camera MORE to the left and right to make sure that the focusing point is not confused by the upper or lower card.

VIOLA! I got very very sharp photos from the tests this round! Both Tamron lenses show very sharp photos and ACCURATE focus! I tested both at F2.8 and they are all sharp!

This lens has been highly sort after by Pentax users for many years. Not only it is good and sharp, but also because of the attractive price tag.

The lens is made in Japan, quality control is good and the lens is clean inside out.

I will not hesitate recommend this lens to anyone! O0

(Some photos later of the Tamron lens)
Yours truly,
Kho King
PENTAXWORLD Founder & Administrator
ShaShinKi Founder ~ Online Camera Shop!
PhotoMalaysia Co-Founder

March 12, 2008, 09:18:45 PM
Reply #1

sooming

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #1 on: March 12, 2008, 09:18:45 PM »
Ah...an excellent alternative, finally. Can't wait to see some sample shots. Thanks, KK!

March 13, 2008, 05:54:48 PM
Reply #2

roentarre

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #2 on: March 13, 2008, 05:54:48 PM »
What is the price tag for this zoom?

It would be great if you could post sample pictures too :)

March 13, 2008, 10:19:11 PM
Reply #3

leto78

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #3 on: March 13, 2008, 10:19:11 PM »
I didn't understand the solution for the focusing problem!!!

What was the problem about?

March 13, 2008, 11:00:16 PM
Reply #4

Offline KhoKing

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #4 on: March 13, 2008, 11:00:16 PM »
I didn't understand the solution for the focusing problem!!!

What was the problem about?

I am not exactly sure if I were correct, but I think Pentax focusing sensor is very wide...so if your subjects are close to each other, your DSLR might pick up the wrong subject to focus.

So, the solution is to separate the two subjects clearly far apart. :)
Yours truly,
Kho King
PENTAXWORLD Founder & Administrator
ShaShinKi Founder ~ Online Camera Shop!
PhotoMalaysia Co-Founder

March 13, 2008, 11:01:30 PM
Reply #5

Offline KhoKing

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #5 on: March 13, 2008, 11:01:30 PM »
What is the price tag for this zoom?

It would be great if you could post sample pictures too :)

Quite cheap...US$450.00 at my online store with FREE WORLDWIDE SHIPPING. ;)

http://shashinki.com/shop/tamron-1750mm-aspherical-pentax-mount-made-japan-p-1169.html

Sorry, I do not have the sample pics with me, I tested the camera and lens in my dealer shop.

Yours truly,
Kho King
PENTAXWORLD Founder & Administrator
ShaShinKi Founder ~ Online Camera Shop!
PhotoMalaysia Co-Founder

March 14, 2008, 01:45:01 PM
Reply #6

Offline KhoKing

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #6 on: March 14, 2008, 01:45:01 PM »
Updated with some photos of the Tamron lens. :)
Yours truly,
Kho King
PENTAXWORLD Founder & Administrator
ShaShinKi Founder ~ Online Camera Shop!
PhotoMalaysia Co-Founder

April 24, 2009, 03:42:42 AM
Reply #7

xXx

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #7 on: April 24, 2009, 03:42:42 AM »
I'm seriously considering this lens.  Does anyone use this on their K200D?  Any issues? Pictures? ::)

April 24, 2009, 06:16:52 AM
Reply #8

fiish

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #8 on: April 24, 2009, 06:16:52 AM »
Would also like to see an opinion on how it compares with the DA* 16-50, if it's a credible alternative to consider as wide-to-normal zoom.

Yes the DA* does offer a lot more like SDM and weather proofing but there's quite a price difference as well :D

July 01, 2009, 11:25:43 PM
Reply #9

Franky Roels

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #9 on: July 01, 2009, 11:25:43 PM »
xXx,
Since june  2008 i'm using the Tamron 17 - 50 /2.8 on a K20D. The lens is very sharp, fast, well balanced (working with Battery Pack). The contrast and colors are very well, just a litle bit chromatic aberation (correction in lightroom! is very easy) on edges and extreme light conditions. The diaphragm blades give an nice transition from sharp to unscharp.
These shots are made in Caernarfon on a vacation in Wales last month.
the full shot and detail as attachment.

Franky

July 02, 2009, 01:03:34 AM
Reply #10

xXx

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #10 on: July 02, 2009, 01:03:34 AM »
Thanks Franky.  I'm just amazed by the reviews on this lens yet some complain of back focusing.  I don't see too many used Tamrons on either eBay or Craig's list.  No used = satisfied users?  ::)

July 02, 2009, 03:53:09 AM
Reply #11

Offline Mike Pearson

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #11 on: July 02, 2009, 03:53:09 AM »
Franky,

Very nice photo - there doesn't seem to be anything wrong with that lens.  8)

Mike
K30D, K100D, MZ7, MZ6, DA 18-135 f/3.5-5.6 ED AL[IF] DC WR, FA 28-105 AL IF , FA 50 f/1.4, DA 35 f/2.8 Limited, DA 70 f/2.4 Limited, DA 16-45 ED, DA L 18-55mm, DA 50-200 ED, DA 55-300mm F4-5.8 ED, Pentax AF-360FGZ, AF-540FGZ.[/

July 02, 2009, 04:05:33 AM
Reply #12

Online blackcloudbrew

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #12 on: July 02, 2009, 04:05:33 AM »
My daughter upgraded her Canon 40D's Canon 28-135 kit lens to this lens and has really had a great results with it. Of course her's isn't image stabilized like my Pentax...

Empirically comparing shots between her Canon 40D+Tammy 17-50 f2.8 and my k10d+DA*16-50 f2.8, I like the results from mine better, although I think I get a bit of vignetting on some wide angle shots that she doesn't. However, that is hardly an exhaustive comparison.

Tim
"In wine there is wisdom, in beer there is freedom, in water there is bacteria." - Old German Proverb

K-1, K3 (Silver!), Q7, K5, K20d, K100ds(IR), MZ-S, MX-1,  PZ-1p (2), MZ-5n, OptioW80, 645, 645n, 6x7, and a bunch of glass.

July 02, 2009, 11:28:30 AM
Reply #13

tavern

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #13 on: July 02, 2009, 11:28:30 AM »
hey  everyone, i've been getting by with what are basically consumer zooms for a long time and i am about to delve into buying my first "decent" zoom, something very much like the one talked about here.

my biggest unknown is night performance, how do the 2.8 lenses go at night? i'm currently using a 50mm 1.4 which is great but i want more width. group shots at parties and night time shots of city scapes see me having to either use a tripod or walk backwards a mile, even for just a quick candid shot.

July 03, 2009, 03:03:09 AM
Reply #14

Franky Roels

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Re: Tamron SP 17-50mm F2.8 - First Impression
« Reply #14 on: July 03, 2009, 03:03:09 AM »
Freinds,

the night performance for the Tamron 17 - 50 /2.8 is very pleasant. this is a shot at 100 iso - 15sec - f 8.0 at 17mm, in februari 2009. This is a new bridge crossing the "Leie" in Kortrijk Belgium. Between 2 showers and about 0C. I used a manfrotto 055 proxb witk  488RC4 ballhead with cable release.
Used Adobe lightroom 2.2 and PS CS3 for a few changes: withe balance + sharpening and taken a few sparks of rain on the lens away with healing brush.