Re: Geso: photos taken with Pentax mount glass on full frame, camera

2016-01-02 Thread P.J. Alling
Obviously as Leica is the thinking man's camera, the only sport that 
matters is chess.


On 1/2/2016 2:40 PM, Donald Guthrie wrote:
Thanks for the looking, Mark C. I tend to agree so far with your 
projected use of FF vs APSC. I do not have a FF macro or even long 
tele to do any close-up work. Birding might be great with a FF Pentax 
& Paul's new lens, & futile with the Sony A7. In passing, Leica has a 
new mirror-less "sports" camera at their usual pricing. It offers one 
lens- a 28-90 for sports???


On 1/1/16 7:57 PM, pdml-requ...@pdml.net wrote:

Message: 6
Date: Fri, 1 Jan 2016 18:45:05 -0500
From: Mark C
To: Pentax-Discuss Mail List
Subject: Re: Geso: photos taken with Pentax mount glass on full frame
camera
Message-ID:<56870f81.5020...@charter.net>
Content-Type: text/plain; charset=windows-1252; format=flowed

Nice collection of images, Don. I really like the first set - the snowy
scenes.

In many ways I like the effect of the crop factor but will be interested
in seeing how the FF works. I wonder if APS-C will still be the way to
go for macros and telephoto work, while full frame would have the
advantage with landscapes and general shooting. In any case, it's good
to see that the old FF pentax glass seems to hold up well.

Mark

On 12/30/2015 4:17 PM, Donald Guthrie wrote:

>As rumors of a Full Frame camera are getting closer to fruition, I
>wondered how my pentax mount glass would work. Borrow Lenses offered
>me 17 days for a 7 day rental price over the holidays. So I rented a
>Sony A7II. My full frame lens collection consisted of Pentax 28mm,
>28-70 & 70-200 Tamrons, a 50mm Pentax 42 screw mount Sears labeled
>50mm, A Tokina 70 to 200, a Sigma 28mm and Rokinon 14 mm. These photos
>are the results of my shooting. I did not take notes on which lenses I
>used for the pix and of course the exif is no help. If there is a
>specific one of the above lenses you want me to test, let me know and
>I will post that one. Most are non or slightly cropped except the one
>of all colored glass which is maybe a 90-100% crop. Used a $15
>adaptor. I had no Sony native lenses to use.
>
>My general impression of FF is nice bokeh and low noise even even
>after pulling the shadows up from black. The biggest surprise for me
>was how wide a 28mm  is and how short a 200 mm is.
>
>Here are the links to two sets; would be happy to get your opinion on
>the photos and to answer any questions you might have.
>
>
>http://adobe.ly/1TqeEeb
>
>And a second one on an afternoon in a Botanical Center with butterflys
>& Plants. .
>
>http://adobe.ly/1MyGuit
>






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Re: Geso: photos taken with Pentax mount glass on full frame, camera

2016-01-02 Thread Donald Guthrie
Thanks for the looking, Mark C. I tend to agree so far with your 
projected use of FF vs APSC. I do not have a FF macro or even long tele 
to do any close-up work. Birding might be great with a FF Pentax & 
Paul's new lens, & futile with the Sony A7. In passing, Leica has a new 
mirror-less "sports" camera at their usual pricing. It offers one lens- 
a 28-90 for sports???


On 1/1/16 7:57 PM, pdml-requ...@pdml.net wrote:

Message: 6
Date: Fri, 1 Jan 2016 18:45:05 -0500
From: Mark C
To: Pentax-Discuss Mail List
Subject: Re: Geso: photos taken with Pentax mount glass on full frame
camera
Message-ID:<56870f81.5020...@charter.net>
Content-Type: text/plain; charset=windows-1252; format=flowed

Nice collection of images, Don. I really like the first set - the snowy
scenes.

In many ways I like the effect of the crop factor but will be interested
in seeing how the FF works. I wonder if APS-C will still be the way to
go for macros and telephoto work, while full frame would have the
advantage with landscapes and general shooting. In any case, it's good
to see that the old FF pentax glass seems to hold up well.

Mark

On 12/30/2015 4:17 PM, Donald Guthrie wrote:

>As rumors of a Full Frame camera are getting closer to fruition, I
>wondered how my pentax mount glass would work. Borrow Lenses offered
>me 17 days for a 7 day rental price over the holidays. So I rented a
>Sony A7II. My full frame lens collection consisted of Pentax 28mm,
>28-70 & 70-200 Tamrons, a 50mm Pentax 42 screw mount Sears labeled
>50mm, A Tokina 70 to 200, a Sigma 28mm and Rokinon 14 mm. These photos
>are the results of my shooting. I did not take notes on which lenses I
>used for the pix and of course the exif is no help. If there is a
>specific one of the above lenses you want me to test, let me know and
>I will post that one. Most are non or slightly cropped except the one
>of all colored glass which is maybe a 90-100% crop. Used a $15
>adaptor. I had no Sony native lenses to use.
>
>My general impression of FF is nice bokeh and low noise even even
>after pulling the shadows up from black. The biggest surprise for me
>was how wide a 28mm  is and how short a 200 mm is.
>
>Here are the links to two sets; would be happy to get your opinion on
>the photos and to answer any questions you might have.
>
>
>http://adobe.ly/1TqeEeb
>
>And a second one on an afternoon in a Botanical Center with butterflys
>& Plants. .
>
>http://adobe.ly/1MyGuit
>



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Re: Geso: photos taken with Pentax mount glass on full frame camera

2016-01-01 Thread Mark C
Nice collection of images, Don. I really like the first set - the snowy 
scenes.


In many ways I like the effect of the crop factor but will be interested 
in seeing how the FF works. I wonder if APS-C will still be the way to 
go for macros and telephoto work, while full frame would have the 
advantage with landscapes and general shooting. In any case, it's good 
to see that the old FF pentax glass seems to hold up well.


Mark

On 12/30/2015 4:17 PM, Donald Guthrie wrote:
As rumors of a Full Frame camera are getting closer to fruition, I 
wondered how my pentax mount glass would work. Borrow Lenses offered 
me 17 days for a 7 day rental price over the holidays. So I rented a 
Sony A7II. My full frame lens collection consisted of Pentax 28mm, 
28-70 & 70-200 Tamrons, a 50mm Pentax 42 screw mount Sears labeled 
50mm, A Tokina 70 to 200, a Sigma 28mm and Rokinon 14 mm. These photos 
are the results of my shooting. I did not take notes on which lenses I 
used for the pix and of course the exif is no help. If there is a 
specific one of the above lenses you want me to test, let me know and 
I will post that one. Most are non or slightly cropped except the one 
of all colored glass which is maybe a 90-100% crop. Used a $15 
adaptor. I had no Sony native lenses to use.


My general impression of FF is nice bokeh and low noise even even 
after pulling the shadows up from black. The biggest surprise for me 
was how wide a 28mm  is and how short a 200 mm is.


Here are the links to two sets; would be happy to get your opinion on 
the photos and to answer any questions you might have.



http://adobe.ly/1TqeEeb

And a second one on an afternoon in a Botanical Center with butterflys 
& Plants. .


http://adobe.ly/1MyGuit




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Re: Re: Geso: photos taken with Pentax mount glass on full frame, camera

2016-01-01 Thread Donald Guthrie
Thanks for the look & comments, Alan. These were very informal tests. 
Many variables go into sharpness. None of these was shot on a tripod for 
example. Glad you saw some familiar plants; I just love greenery. Yeah 
it's the math of APSC. that gets to me sometimes.


On 1/1/16 7:27 AM, pdml-requ...@pdml.net wrote:

Message: 1
Date: Fri, 1 Jan 2016 06:24:47 +0200
From: "Alan C"
To: "Pentax-Discuss Mail List"
Subject: Re: Geso: photos taken with Pentax mount glass on full frame
camera
Message-ID: <031254104C51454F9C827185C2FA8E31@AcerTM5744>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response

Some splendid shots there. Can they really get that much better? The old
glass can still do OK for most people. Several of the shots in the
greenhouse look like parts of my garden, butterflies & all (but different
species). Of course, the "wideness" or "shortness" of the lenses is just a
perception - a 28mm is still a 28mmm - we have just become trapped in APSC
crop factor mode.

Alan C

-Original Message-
From: Donald Guthrie
Sent: Wednesday, December 30, 2015 11:17 PM
To:pdml@pdml.net
Subject: Geso: photos taken with Pentax mount glass on full frame camera

As rumors of a Full Frame camera are getting closer to fruition, I
wondered how my pentax mount glass would work. Borrow Lenses offered me
17 days for a 7 day rental price over the holidays. So I rented a Sony
A7II. My full frame lens collection consisted of Pentax 28mm, 28-70 &
70-200 Tamrons, a 50mm Pentax 42 screw mount Sears labeled 50mm, A
Tokina 70 to 200, a Sigma 28mm and Rokinon 14 mm. These photos are the
results of my shooting. I did not take notes on which lenses I used for
the pix and of course the exif is no help. If there is a specific one of
the above lenses you want me to test, let me know and I will post that
one. Most are non or slightly cropped except the one of all colored
glass which is maybe a 90-100% crop. Used a $15 adaptor. I had no Sony
native lenses to use.

My general impression of FF is nice bokeh and low noise even even after
pulling the shadows up from black. The biggest surprise for me was how
wide a 28mm  is and how short a 200 mm is.

Here are the links to two sets; would be happy to get your opinion on
the photos and to answer any questions you might have.


http://adobe.ly/1TqeEeb

And a second one on an afternoon in a Botanical Center with butterflys &
Plants. .

http://adobe.ly/1MyGuit



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Re: Geso: photos taken with Pentax mount glass on full frame camera

2015-12-31 Thread Alan C
Some splendid shots there. Can they really get that much better? The old 
glass can still do OK for most people. Several of the shots in the 
greenhouse look like parts of my garden, butterflies & all (but different 
species). Of course, the "wideness" or "shortness" of the lenses is just a 
perception - a 28mm is still a 28mmm - we have just become trapped in APSC 
crop factor mode.


Alan C

-Original Message- 
From: Donald Guthrie

Sent: Wednesday, December 30, 2015 11:17 PM
To: pdml@pdml.net
Subject: Geso: photos taken with Pentax mount glass on full frame camera

As rumors of a Full Frame camera are getting closer to fruition, I
wondered how my pentax mount glass would work. Borrow Lenses offered me
17 days for a 7 day rental price over the holidays. So I rented a Sony
A7II. My full frame lens collection consisted of Pentax 28mm, 28-70 &
70-200 Tamrons, a 50mm Pentax 42 screw mount Sears labeled 50mm, A
Tokina 70 to 200, a Sigma 28mm and Rokinon 14 mm. These photos are the
results of my shooting. I did not take notes on which lenses I used for
the pix and of course the exif is no help. If there is a specific one of
the above lenses you want me to test, let me know and I will post that
one. Most are non or slightly cropped except the one of all colored
glass which is maybe a 90-100% crop. Used a $15 adaptor. I had no Sony
native lenses to use.

My general impression of FF is nice bokeh and low noise even even after
pulling the shadows up from black. The biggest surprise for me was how
wide a 28mm  is and how short a 200 mm is.

Here are the links to two sets; would be happy to get your opinion on
the photos and to answer any questions you might have.


http://adobe.ly/1TqeEeb

And a second one on an afternoon in a Botanical Center with butterflys &
Plants. .

http://adobe.ly/1MyGuit

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Re:Re: Geso: photos taken with Pentax mount glass on full frame, camera

2015-12-31 Thread Donald Guthrie
Bob, Thanks for taking time to look at the photos & thanks for your 
generous remarks on my photography. Oh I did shoot film, slides mostly 
and developed and printed my own. I was shooting a Ricoh with pentax 
mount lenses because I could not afford the real thing. 90% with that 
Sears branded 50mm and & 10% with cheap telephoto.  No wide angle. My 
1st real digital was Pentax 200D.


This little experiment was to see which lenses would carry over to 
Pentax FF and if not, it does not bode well for the success of Pentax 
FF. If as you say (I I do not dispute) the buyer needs to buy new higher 
quality and higher priced glass the why go Pentax? Just go Canikon! 
Unless the Pentax is so inexpensive it lessens the blow of new lenses.


Sony has the merit of smaller sized cameras for FF. But it turns out 
that fast FF lenses are rather large. The A7 & a 35mm lens weighs 3 lbs 
and ain't pocketable. Advantage Olympus for size & weight.  back to 
Canikon for lens selection.


If I were to go Sony their 35mm ($1500) and 50mm ($1000) are among the 
sharpest lenses ever tested. Money no object it is still a big 
commitment. Many people on the web are raving about using Leica glass on 
the A7 but we all know those are pricy too. And all adapted lenses are 
manual exposure & focus. Except for Canon lenses which work as native on 
Sony with a $3000 dollar adapter. I would keep Pentax cameras & some 
lenses for sports, birds, if nothing else for the reach of the teles. & 
my K01 with a pancake or even the 18-135 is a fun kit for the casual 
walkabout.


Thanks again for giving me all this food for thought.

On 12/30/15 5:28 PM, pdml-requ...@pdml.net wrote:

n 30 Dec 2015, at 21:19, Donald Guthrie  wrote:

>
>As rumors of a Full Frame camera are getting closer to fruition, I wondered how my 
pentax mount glass would work. Borrow Lenses offered me 17 days for a 7 day rental 
price over the holidays. So I rented a Sony A7II. My full frame lens collection 
consisted of Pentax 28mm, 28-70 & 70-200 Tamrons, a 50mm Pentax 42 screw mount 
Sears labeled 50mm, A Tokina 70 to 200, a Sigma 28mm and Rokinon 14 mm. These photos 
are the results of my shooting. I did not take notes on which lenses I used for the 
pix and of course the exif is no help. If there is a specific one of the above lenses 
you want me to test, let me know and I will post that one. Most are non or slightly 
cropped except the one of all colored glass which is maybe a 90-100% crop. Used a $15 
adaptor. I had no Sony native lenses to use.
>
>My general impression of FF is nice bokeh and low noise even even after 
pulling the shadows up from black. The biggest surprise for me was how wide a 28mm 
 is and how short a 200 mm is.

I guess from that that you've only ever shot digital!

>
>Here are the links to two sets; would be happy to get your opinion on the 
photos and to answer any questions you might have.
>
>
>http://adobe.ly/1TqeEeb
>
>And a second one on an afternoon in a Botanical Center with butterflys & 
Plants. .
>
>http://adobe.ly/1MyGuit
>

They're nice photos, well composed and well lit.

When I moved from film to digital I had a very high quality Contax / Zeiss film 
kit. Using the lenses with an adapter on Olympus 4/3rds gear I noticed very 
significant purple fringing with some of the lenses, which meant they were 
effectively useless for digital, so I sold all the Contax / Zeiss stuff.

So the first thing I looked for on your shots was purple fringing because I 
think (could be wrong) that it results from the different alignment of pixels 
and film wrt the light path, and subsequent interference between pixels. I 
didn't notice any in the shots of yours that I looked at. What I did notice is 
that at full magnification your shots are softer than the quality of your 
photography deserves. You don't say specifically which models of lenses you 
use, but I suspect the softness is in the glass, not including the fullness of 
the frame.

You should try and get hold of two or three equivalent focal length Sony lenses 
and shoot comparisons with your lenses under controlled conditions, as best you 
can.

Your pictures deserve better lenses. Go for quality rather than quantity.

B



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Re: Geso: photos taken with Pentax mount glass on full frame camera

2015-12-30 Thread Bob W-PDML
On 30 Dec 2015, at 21:19, Donald Guthrie  wrote:
> 
> As rumors of a Full Frame camera are getting closer to fruition, I wondered 
> how my pentax mount glass would work. Borrow Lenses offered me 17 days for a 
> 7 day rental price over the holidays. So I rented a Sony A7II. My full frame 
> lens collection consisted of Pentax 28mm, 28-70 & 70-200 Tamrons, a 50mm 
> Pentax 42 screw mount Sears labeled 50mm, A Tokina 70 to 200, a Sigma 28mm 
> and Rokinon 14 mm. These photos are the results of my shooting. I did not 
> take notes on which lenses I used for the pix and of course the exif is no 
> help. If there is a specific one of the above lenses you want me to test, let 
> me know and I will post that one. Most are non or slightly cropped except the 
> one of all colored glass which is maybe a 90-100% crop. Used a $15 adaptor. I 
> had no Sony native lenses to use.
> 
> My general impression of FF is nice bokeh and low noise even even after 
> pulling the shadows up from black. The biggest surprise for me was how wide a 
> 28mm  is and how short a 200 mm is.

I guess from that that you've only ever shot digital!
> 
> Here are the links to two sets; would be happy to get your opinion on the 
> photos and to answer any questions you might have.
> 
> 
> http://adobe.ly/1TqeEeb
> 
> And a second one on an afternoon in a Botanical Center with butterflys & 
> Plants. .
> 
> http://adobe.ly/1MyGuit
> 

They're nice photos, well composed and well lit. 

When I moved from film to digital I had a very high quality Contax / Zeiss film 
kit. Using the lenses with an adapter on Olympus 4/3rds gear I noticed very 
significant purple fringing with some of the lenses, which meant they were 
effectively useless for digital, so I sold all the Contax / Zeiss stuff.

So the first thing I looked for on your shots was purple fringing because I 
think (could be wrong) that it results from the different alignment of pixels 
and film wrt the light path, and subsequent interference between pixels. I 
didn't notice any in the shots of yours that I looked at. What I did notice is 
that at full magnification your shots are softer than the quality of your 
photography deserves. You don't say specifically which models of lenses you 
use, but I suspect the softness is in the glass, not including the fullness of 
the frame.

You should try and get hold of two or three equivalent focal length Sony lenses 
and shoot comparisons with your lenses under controlled conditions, as best you 
can. 

Your pictures deserve better lenses. Go for quality rather than quantity.

B
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Geso: photos taken with Pentax mount glass on full frame camera

2015-12-30 Thread Donald Guthrie
As rumors of a Full Frame camera are getting closer to fruition, I 
wondered how my pentax mount glass would work. Borrow Lenses offered me 
17 days for a 7 day rental price over the holidays. So I rented a Sony 
A7II. My full frame lens collection consisted of Pentax 28mm, 28-70 & 
70-200 Tamrons, a 50mm Pentax 42 screw mount Sears labeled 50mm, A 
Tokina 70 to 200, a Sigma 28mm and Rokinon 14 mm. These photos are the 
results of my shooting. I did not take notes on which lenses I used for 
the pix and of course the exif is no help. If there is a specific one of 
the above lenses you want me to test, let me know and I will post that 
one. Most are non or slightly cropped except the one of all colored 
glass which is maybe a 90-100% crop. Used a $15 adaptor. I had no Sony 
native lenses to use.


My general impression of FF is nice bokeh and low noise even even after 
pulling the shadows up from black. The biggest surprise for me was how 
wide a 28mm  is and how short a 200 mm is.


Here are the links to two sets; would be happy to get your opinion on 
the photos and to answer any questions you might have.



http://adobe.ly/1TqeEeb

And a second one on an afternoon in a Botanical Center with butterflys & 
Plants. .


http://adobe.ly/1MyGuit

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