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01-29-2013, 10:05 AM   #1
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Tamron AF 18-250mm f/3.5-6.3 LD DiII Macro

I just bought new K-01 with 40mm. Im considering to buy a zoom len for K-01.

I need to make sure Tamron AF 18-250mm f/3.5-6.3 LD DiII Macro is good for K-01?


Thank in advance for your advice.



01-29-2013, 10:40 AM   #2
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I have a Tammy 18-250, and I never use that lens on the K-01. Auto-Focusing takes forever, with lots of racking back and forth, and in low light (indoors), the camera makes weird noises and gives up. The superzoom lens and CD AF are not a good matchup, in my opinion. There's also the issue of such a long lens (zoomed out) balancing with the body. The K-01 is better with primes and smaller zooms.
01-29-2013, 11:47 AM   #3
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QuoteOriginally posted by THoog Quote
I have a Tammy 18-250, and I never use that lens on the K-01. Auto-Focusing takes forever, with lots of racking back and forth, and in low light (indoors), the camera makes weird noises and gives up. The superzoom lens and CD AF are not a good matchup, in my opinion. There's also the issue of such a long lens (zoomed out) balancing with the body. The K-01 is better with primes and smaller zooms.
Which smaller zoom do you recommend for K-01?
01-29-2013, 12:14 PM   #4
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QuoteOriginally posted by airymind Quote
Which smaller zoom do you recommend for K-01?
The only zooms I've used much on the K-01 are the F 35-70, the "kit" DA 18-55, and the Tamron 17-50/2.8.

The F 35-70 is one of my favorite "walking around" lenses - small, light, fast-focusing, with generally good optics. It does have a quirk in that the minimum focus distance is about two feet, and the maximum focus distance in "macro" mode is a little less, so there is a 'dead zone' to work around.

The 18-55 lens is, well, the kit lens. Lightweight and decent enough stopped down. On the K-01, I've mostly used it for playing with 3D, since it's the only lens I have more than one copy of (except maybe for some old 50s).

The Tamron 17-50 is a bit bigger and heavier than I like, but it's my go-to lens for shooting in dim museums.

I'm sure others who have used longer zooms with the K-01 can/will give a better answer.

01-29-2013, 05:53 PM   #5
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Gee, nobody? You're not going to make airymind listen to me, are you?

Okay, I dug out my longer zooms and briefly tried them on the K-01:
DA 50-200
DA 55-300
DA 18-135 WR

Of the three longer zooms, the 50-200 handled the best, being smaller and lighter. The 50-200 has decent image quality in good light, and it can be gotten fairly inexpensively. AF speed has been described as "I can live with it".

For focus speed / accuracy (indoors, rather low light), the 55-300 probably did the best (somewhat of a surprise there) - it would get a lock where the others gave up. It may also have the best image quality of the three. I wasn't that impressed with it on my K-x, but it really shines on a 16MP sensor. It is a long beast fully extended - about the same length as the Tamron 18-250.

The 18-135 is another superzoom, like the Tamron 18-250, so has more compromises. Focusing is quieter with the built-in motor. It's not as long as the 18-250 or the 55-300, but is still fairly bulky. I'd say the IQ is second, after the 55-300.

I also dug out an old FA 28-90. It's an okay lens - all plastic. It's better than the 28-80s that were made about the same time. It's very lightweight, and won't survive being dropped on a hard surface. IQ is okay, nothing spectacular. AF speed is tolerable, if the light is good.
01-29-2013, 07:10 PM   #6
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QuoteOriginally posted by airymind Quote
Tamron AF 18-250mm f/3.5-6.3 LD DiII Macro is good for K-01
For most people - NO.

But for a knowledgeable and/or adaptable photographer, yes. But then again, optically no. But it does have a good zoom range, but that aperature range is nothing short of terrible.

And more on the aperature range - that it exactly what makes it not work well on the Pentax K-01. The lens mentioned will work good to a point - and that point is generally the lens will work well above the aperature of f4.5 to f5.0. For that lens' usually above f5.0 depending upon lighting and all. Drop below that and you might be needing to do some adapting to make it work well - or simply switch over to manual.

QuoteOriginally posted by THoog Quote
The K-01 is better with primes and smaller zooms
Not sure what smaller zooms means, but... My K-01 works well with most any zoom range and focal length. Again it's more about aperatures. I use the fixed Sigma 300mm f2.8 and also the Sigma 120-300mm fixed aperature f2.8 - zero issues.

The Tamron was marketed to keep the zoom range and not much else. It really sacrifices in aperature and also optical quality. But then again to get either one of those would mean a filter in excess of some 100mm
01-29-2013, 07:30 PM   #7
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QuoteOriginally posted by Medium FormatPro Quote
Not sure what smaller zooms means, but...
I meant for handheld use, physically smaller, not much bigger than the kit lens. For the Tamron 18-250 or DA 55-300, I'd rather have a bigger camera body with a grip.
01-29-2013, 07:32 PM   #8
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Thank for all replies. I do not understand why some stores in Canada are selling Pentax K-01 with DA 18-270mm.(about less than 1K dollars.)

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