Tamron 70-200mm

**hjoseph7** · 09-08-2016, 06:53 PM

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

**skunktail** · 09-08-2016, 10:10 PM

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?

**hjoseph7** · 09-09-2016, 05:04 AM

I thought the lens might be optimized to work with cropped sensors.

Bengan · 09-09-2016, 05:07 AM

As expected it's fantastic with the K1 as well

Eric64800 · 09-09-2016, 06:02 AM

Hi,

I 've one , very good lens with my K1 in FF mode.

wanderer2 · 09-09-2016, 06:35 AM

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.

**clackers** · 09-10-2016, 01:54 AM

Originally posted by hjoseph7

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.

**wtlwdwgn** · 09-10-2016, 09:44 AM - **1 Like**

Nuff said.

Kaisas · 09-20-2016, 12:45 AM

It s my favorite lens.. it s kibda heavy but it s very sharp lens.

bdery · 09-20-2016, 05:06 AM

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.

**clackers** · 09-20-2016, 06:59 AM - **1 Like**

It's nice and quick to focus, too:

**BarryE** · 11-19-2016, 11:04 AM

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.

Bengan · 11-19-2016, 02:02 PM

Originally posted by BarryE

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.

**Scorpio71GR** · 11-19-2016, 02:20 PM

Originally posted by BarryE

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.

09-08-2016, 06:53 PM	#1
hjoseph7 Site Supporter Join Date: May 2014 Location: Minnesota Photos: Gallery \| Albums Posts: 2,047	Tamron 70-200mm Has anybody tried the Tamron 70-200 f2.8($799 @ B&H) with the K1 Full Frame ?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
New Tamron 70-200mm F4 Patent	D1N0	Pentax SLR Lens Discussion	2	07-26-2016 10:50 AM
Tamron 70-200mm availability	damianc	Pentax SLR Lens Discussion	10	01-03-2016 09:34 PM
Tamron 70-200mm f2.8	Conqueror	Pentax SLR Lens Discussion	19	11-22-2014 10:30 AM
Tamron 70-200mm and K-50	absnig	Troubleshooting and Beginner Help	7	10-14-2014 09:01 AM

09-08-2016, 10:10 PM	#2
skunktail Site Supporter Join Date: Jan 2013 Location: Sydney, NSW Photos: Gallery \| Albums Posts: 287	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
hjoseph7 Site Supporter Join Date: May 2014 Location: Minnesota Photos: Gallery \| Albums Posts: 2,047 Original Poster	I thought the lens might be optimized to work with cropped sensors.

09-09-2016, 05:07 AM	#4
Bengan Pentaxian Join Date: Nov 2012 Location: Stockholm Photos: Gallery \| Albums Posts: 1,756	As expected it's fantastic with the K1 as well

09-09-2016, 06:02 AM	#5
Eric64800 Forum Member Join Date: Aug 2016 Location: Pyrenées Atlantiques Posts: 55	Hi, I 've one , very good lens with my K1 in FF mode.

09-09-2016, 06:35 AM	#6
wanderer2 Veteran Member Join Date: Jul 2016 Posts: 301	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
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by hjoseph7 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
wtlwdwgn Site Supporter Join Date: Jan 2007 Location: Billings, MT Photos: Gallery \| Albums Posts: 13,840	Nuff said.

09-20-2016, 12:45 AM	#9
Kaisas Senior Member Join Date: Sep 2016 Posts: 121	It s my favorite lens.. it s kibda heavy but it s very sharp lens.

09-20-2016, 05:06 AM	#10
bdery Pentaxian Join Date: Mar 2008 Location: Quebec city, Canada Photos: Gallery Posts: 9,357	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
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	It's nice and quick to focus, too:

11-19-2016, 11:04 AM	#12
BarryE Site Supporter Join Date: Jan 2013 Location: Hampshire, UK Posts: 1,653	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
Bengan Pentaxian Join Date: Nov 2012 Location: Stockholm Photos: Gallery \| Albums Posts: 1,756	Originally posted by BarryE 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
Scorpio71GR Loyal Site Supporter Join Date: Nov 2014 Location: Michigan Photos: Gallery \| Albums Posts: 6,005	Originally posted by BarryE 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.