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09-08-2016, 06:53 PM   #1
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Tamron 70-200mm

Has anybody tried the Tamron 70-200 f2.8($799 @ B&H) with the K1 Full Frame ?

09-08-2016, 10:10 PM   #2
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use it all the time. Works just fine.
It is a full frame K-mount lens

was there any particular thing you were concerned about?
09-09-2016, 05:04 AM   #3
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I thought the lens might be optimized to work with cropped sensors.
09-09-2016, 05:07 AM   #4
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As expected it's fantastic with the K1 as well

09-09-2016, 06:02 AM   #5
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Hi,

I 've one , very good lens with my K1 in FF mode.
09-09-2016, 06:35 AM   #6
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At the time I purchased the K-1 I also purchased the Tamron SP 70-200 2.8 Di LD (IF) Macro (just to be certain we are discussing the same lens). It has been my most often used lens since. I use the K-1 exclusively for landscape use, always on a tripod, stopped down to f8 or smaller, MUP, and remote shutter release. Used in this way I have found this lens to be very sharp and yield excellent image quality. One of the reasons I switched from APS-C was to make bigger prints. The largest I have made with this lens so far is 20 X 30 and it is very, very sharp. I recommend this lens.
09-10-2016, 01:54 AM   #7
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QuoteOriginally posted by hjoseph7 Quote
I thought the lens might be optimized to work with cropped sensors.
Canikon FF owners have been singing its praises for years.

A hint for your future reference: if a Tamron lens carries the Di label, it's full frame, Di II is cropped.

09-10-2016, 09:44 AM - 1 Like   #8
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Nuff said.


09-20-2016, 12:45 AM   #9
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It s my favorite lens.. it s kibda heavy but it s very sharp lens.
09-20-2016, 05:06 AM   #10
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I'm testing it right now. It's a superb lens for the price. There are some flaws compared to more expensive lenses (I really dislike the MF clutch, for instance, and screw-drive AF doesn't "feel" 2016) but it's hard to fault it optically.
09-20-2016, 06:59 AM - 1 Like   #11
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It's nice and quick to focus, too:

11-19-2016, 11:04 AM   #12
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I'm a little confused by the Tamron's clutch arrangement. On my Pentax lenses that have an AF/MF switch I always leave it in AF and switch to MF (regularly) using the camera's (K-3/K-1) AF/MF switch. I don't recall ever switching to manual focus using a len's AF/MF switch. Why would I not be able to do this with the Tamron ? If so, why are folk mentioning the clutch mechanism in detail ?

Thanks.
11-19-2016, 02:02 PM   #13
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QuoteOriginally posted by BarryE Quote
I'm a little confused by the Tamron's clutch arrangement. On my Pentax lenses that have an AF/MF switch I always leave it in AF and switch to MF (regularly) using the camera's (K-3/K-1) AF/MF switch. I don't recall ever switching to manual focus using a len's AF/MF switch. Why would I not be able to do this with the Tamron ? If so, why are folk mentioning the clutch mechanism in detail ?

In order to release the screw drive you have to set booth the lens and the camera to manual focus. This is, in my opinion, the main draw back with this lens.
11-19-2016, 02:20 PM   #14
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QuoteOriginally posted by BarryE Quote
I'm a little confused by the Tamron's clutch arrangement. On my Pentax lenses that have an AF/MF switch I always leave it in AF and switch to MF (regularly) using the camera's (K-3/K-1) AF/MF switch. I don't recall ever switching to manual focus using a len's AF/MF switch. Why would I not be able to do this with the Tamron ? If so, why are folk mentioning the clutch mechanism in detail ?

Thanks.
On the Tamron when in autofocus the focus ring does not focus the lens until you move the clutch to the MF position. At this point the focus ring will focus the lens but it also turns the screwdrive mechanism. If you did not move the camera's switch to MF you will also be turning the screwdrive mechanism in the camera. On the older F series lenses they had a clutch but that also disengaged the screwdrive mechanism on the lens at the same time. The older Tamron lenses are a two step process.
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