RE: Time for a new macro purchase--possible duplicate posting, oops

2014-06-19 Thread Barry Rice
Hey All,

Thanks for your comments on the Tamron and Pentax mid-length macros. This
was very helpful information.

Cheers

Barry

Barry Rice, Ph.D.
Sarracenia.com



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Re: Time for a new macro purchase--possible duplicate posting, oops

2014-06-17 Thread Mark C

HI Barry -

I have an older version of the Tamron - the 90mm f2.8 auto focus - and 
the DFA Pentax 100mm Macro (non WR). Both are excellent lenses but the 
biggsest difference I notice is the the Pentax has the quick-shift focus 
adjustment which makes manually fine tuning focus very quick and easy. 
With the Tamron I have to both pull the lens focus ring back to put it 
in manual focus mode *and* disable AF on the body. The two step process 
if very clunky (would be better to be able to juse disengage AF from the 
body.) Like I said, I have the film era Tamron lens, maybe the latest 
versions offer something more like the Pentax quick shift. To me that 
would be a significant issue.


Optically both lenses seem to be excellent, though I bought the Tamron 
last year to use with film bodies and have not really tested it with a 
digital body.


Mark

On 6/16/2014 10:04 AM, Barry Rice wrote:

Hey Brian,

Thanks for  your input. You answered what was perhaps my most critical
question. Good to see that Tamron has graced Pentax with a dedicated model,
instead of just Canon and Nikon.

How does the focus on the AF Tamron feel?

Barry

Barry Rice, Ph.D.
Sarracenia.com






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Re: Time for a new macro purchase--possible duplicate posting, oops

2014-06-16 Thread Brian Walters

Hi Barry

Quoting Barry Rice bamr...@ucdavis.edu:


Hey Folks,

Long time reader to this list, although I tend to be very sporadic. (By
the way, sorry if this is a duplicate posting, but I reposted in plain text
in case it was necessary.)


It is!

I had the 90mm f2.5 adaptall for many years, using it for much the  
same purpose as you - wildflower photography.  Eventually I decided I  
wanted autofocus so I sold the adaptall lens and replaced it with the  
Tamron AF 90 mm f/2.8 Di.  I haven't regretted the decision even  
though I haven't used it quite as much as I thought I would (so far).   
It's a fine performer and I don't think you'd be disappointed if you  
bought one.  It can be used in both autofocus and manual modes and  
it's not an adaptall lens.


I can't comment on the two Pentax lenses.



Cheers

Brian

++
Brian Walters
Western Sydney Australia
http://lyons-ryan.org/southernlight/




So, I do a lot of plant macro work for stock photography. I never use my
camera off-tripod. Also, with my K7 (my primary camera body), I always shoot
with locking the mirror up first, by either using the 2-sec lock up, or in
live view mode.

ANYWAY, my mid-length camera lens of choice has long been the 90 mm Tamron
F/2.8 manual focus. My wife is starting to use this a lot for butterflies,
but would like an autofocus lens of the same approximate length. By the way,
I?ve learned to hate the adaptall mount, as I?ve gone through a couple, even
though my lens is working great.

So, I see that there is a Tamron AF 90 mm f/2.8 Di SP A/M lens on Amazon and
the other usual markets, for about $438. There are also two Pentax f/2.8
100mm lenses, a WR FA smc for about $650, and a D FA for about $850.

For complete clarity, I?ll include Amazon links to the three lenses below.

So, to the Pentax gods and prophets here, I pose my questions.

1) I?m correct in thinking that all three lenses are autofocus, but can be
used in manual focus too, right?
2) The Tamron for Pentax does not need a damnable adaptall mount, does it?
3) What is the skinny on how these lenses all perform?

Your wisdom is most appreciated

Tamron 90:
http://www.amazon.com/dp/B0007YZLIK/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8c
olid=22I5NPVQK4MNXcoliid=I2Y6DA5UN15NTRpsc=1

Pentax 100 WR:
http://www.amazon.com/dp/B0030GGS3O/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8c
olid=22I5NPVQK4MNXcoliid=I29Z64M1ERC674

Pentax 100 D FA:
http://www.amazon.com/dp/B0002YE65Y/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8c
olid=22I5NPVQK4MNXcoliid=I1AP5RPZPWJ7QN nbsp;

Cheers

Barry


Barry Rice, Ph.D.
Sarracenia.com






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Time for a new macro purchase--possible duplicate posting, oops

2014-06-16 Thread Barry Rice
Hey Brian,

Thanks for  your input. You answered what was perhaps my most critical
question. Good to see that Tamron has graced Pentax with a dedicated model,
instead of just Canon and Nikon.

How does the focus on the AF Tamron feel?

Barry

Barry Rice, Ph.D.
Sarracenia.com



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Re: Time for a new macro purchase--possible duplicate posting, oops

2014-06-16 Thread Stanley Halpin
Barry - I can’t give you specific detailed comments on the two Pentax lenses. 
But I have never heard anybody complain about the image quality from any Pentax 
macro- that has always seemed to be a particular niche for them. Using them in 
AF mode is a challenge, they will tend to be slower than most non-macro lenses. 
But macros are mostly about manual focus anyway.

I have the 100 DFA. I tend to use either the 35mm or 200mm macros and seldom 
pull out the 100mm, but have no hesitation using it when that focal length is 
called for. 

I am quite surprised to see the Amazon pricing on the two Pentax lenses. I 
would have expected the newer WR lens to be the same or more than the D FA; the 
Amazon links show the WR to be a couple hundred $ less? Now you’ve got me 
thinking… I may sell the DFA and switch to the WR. I quite like having the WR 
capability.

stan

On Jun 16, 2014, at 1:49 AM, Barry Rice bamr...@ucdavis.edu wrote:

 Hey Folks,
 
 Long time reader to this list, although I tend to be very sporadic. (By
 the way, sorry if this is a duplicate posting, but I reposted in plain text
 in case it was necessary.)
 
 So, I do a lot of plant macro work for stock photography. I never use my
 camera off-tripod. Also, with my K7 (my primary camera body), I always shoot
 with locking the mirror up first, by either using the 2-sec lock up, or in
 live view mode.
 
 ANYWAY, my mid-length camera lens of choice has long been the 90 mm Tamron
 F/2.8 manual focus. My wife is starting to use this a lot for butterflies,
 but would like an autofocus lens of the same approximate length. By the way,
 I’ve learned to hate the adaptall mount, as I’ve gone through a couple, even
 though my lens is working great.
 
 So, I see that there is a Tamron AF 90 mm f/2.8 Di SP A/M lens on Amazon and
 the other usual markets, for about $438. There are also two Pentax f/2.8
 100mm lenses, a WR FA smc for about $650, and a D FA for about $850. 
 
 For complete clarity, I’ll include Amazon links to the three lenses below.
 
 So, to the Pentax gods and prophets here, I pose my questions.
 
 1) I’m correct in thinking that all three lenses are autofocus, but can be
 used in manual focus too, right?
 2) The Tamron for Pentax does not need a damnable adaptall mount, does it?
 3) What is the skinny on how these lenses all perform?
 
 Your wisdom is most appreciated
 
 Tamron 90:
 http://www.amazon.com/dp/B0007YZLIK/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8c
 olid=22I5NPVQK4MNXcoliid=I2Y6DA5UN15NTRpsc=1
 
 Pentax 100 WR:
 http://www.amazon.com/dp/B0030GGS3O/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8c
 olid=22I5NPVQK4MNXcoliid=I29Z64M1ERC674
 
 Pentax 100 D FA:
 http://www.amazon.com/dp/B0002YE65Y/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8c
 olid=22I5NPVQK4MNXcoliid=I1AP5RPZPWJ7QN  
 
 Cheers
 
 Barry
 
 
 Barry Rice, Ph.D.
 Sarracenia.com
 
 
 
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Re: Time for a new macro purchase--possible duplicate posting, oops

2014-06-16 Thread Brian Walters


Quoting Barry Rice bamr...@ucdavis.edu:


Hey Brian,

Thanks for  your input. You answered what was perhaps my most critical
question. Good to see that Tamron has graced Pentax with a dedicated model,
instead of just Canon and Nikon.



Sadly one of the few.  I think this and the 10-24 (which I also have)  
are the only two current Tamron lenses in Pentax mount.




How does the focus on the AF Tamron feel?



On a par with other 'screwdriver' drive lenses - certainly more than  
adequate for my purposes.



--
Cheers

Brian

++
Brian Walters
Western Sydney Australia
http://lyons-ryan.org/southernlight/



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Re: Time for a new macro purchase--possible duplicate posting, oops

2014-06-16 Thread steve harley

on 2014-06-16 14:11 Stanley Halpin wrote

I am quite surprised to see the Amazon pricing on the two Pentax lenses. I 
would have expected the newer WR lens to be the same or more than the D FA; the 
Amazon links show the WR to be a couple hundred $ less? Now you’ve got me 
thinking… I may sell the DFA and switch to the WR. I quite like having the WR 
capability.


that's because Amazon is not itself the actual seller for either; e.g. FumFie 
as the seller of the WR for has one total rating in the last 12 months


for the WR, i would look to B+H because i don't see any straight-up sellers for 
that lens currently on Amazon


for the non-WR i would probably look first at keh.com; at the moment KEH has 
the non-WR in EX+ condition for $400 and the WR in EX for $525



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Time for a new macro purchase--possible duplicate posting, oops

2014-06-15 Thread Barry Rice
Hey Folks,

Long time reader to this list, although I tend to be very sporadic. (By
the way, sorry if this is a duplicate posting, but I reposted in plain text
in case it was necessary.)

So, I do a lot of plant macro work for stock photography. I never use my
camera off-tripod. Also, with my K7 (my primary camera body), I always shoot
with locking the mirror up first, by either using the 2-sec lock up, or in
live view mode.

ANYWAY, my mid-length camera lens of choice has long been the 90 mm Tamron
F/2.8 manual focus. My wife is starting to use this a lot for butterflies,
but would like an autofocus lens of the same approximate length. By the way,
I’ve learned to hate the adaptall mount, as I’ve gone through a couple, even
though my lens is working great.

So, I see that there is a Tamron AF 90 mm f/2.8 Di SP A/M lens on Amazon and
the other usual markets, for about $438. There are also two Pentax f/2.8
100mm lenses, a WR FA smc for about $650, and a D FA for about $850. 

For complete clarity, I’ll include Amazon links to the three lenses below.

So, to the Pentax gods and prophets here, I pose my questions.

1) I’m correct in thinking that all three lenses are autofocus, but can be
used in manual focus too, right?
2) The Tamron for Pentax does not need a damnable adaptall mount, does it?
3) What is the skinny on how these lenses all perform?

Your wisdom is most appreciated

Tamron 90:
http://www.amazon.com/dp/B0007YZLIK/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8c
olid=22I5NPVQK4MNXcoliid=I2Y6DA5UN15NTRpsc=1

Pentax 100 WR:
http://www.amazon.com/dp/B0030GGS3O/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8c
olid=22I5NPVQK4MNXcoliid=I29Z64M1ERC674

Pentax 100 D FA:
http://www.amazon.com/dp/B0002YE65Y/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8c
olid=22I5NPVQK4MNXcoliid=I1AP5RPZPWJ7QN  

Cheers

Barry


Barry Rice, Ph.D.
Sarracenia.com



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