Re: Interesting Lens

[Bob Sullivan]

glueons

On Wed, Mar 15, 2017 at 4:04 PM, Larry Colen  wrote:

> Unfortunately that neutrino coating doesn't react with light or much
> anything else. I wonder how they get it to stick.
>
> On March 15, 2017 1:50:03 PM PDT, Paul Stenquist 
> wrote:
> >https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_
> 15bs_pk_15mm_blackstone_lens_for.html
>
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Re: Interesting Lens

[mike wilson]

> On 15 March 2017 at 21:30 Mark Roberts  wrote:
> 
> Bob W-PDML wrote:
> 
> >> On 15 Mar 2017, at 21:06, John Francis  wrote:
> >> 
> >>> On Wed, Mar 15, 2017 at 04:50:03PM -0400, Paul Stenquist wrote:
> >>> https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html
> >> 
> >> Hmmm.   Neutrino coating?  How do they get the neutrinos to stop?
> >
> >Charm. They keep them there with gluon.
> 
> That's a strange way of doing it.

Not if the (strong) force is with you.

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Re: Interesting Lens

[Igor PDML-StR]

Mark Roberts Wed, 15 Mar 2017 14:31:40 -0700 wrote:


Bob W-PDML wrote:



On 15 Mar 2017, at 21:06, John Francis  wrote:


On Wed, Mar 15, 2017 at 04:50:03PM -0400, Paul Stenquist wrote:
https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html


Hmmm.   Neutrino coating?  How do they get the neutrinos to stop?


Charm. They keep them there with gluon.



That's a strange way of doing it.


It's lept on.


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Re: Interesting Lens

[ann sanfedele]

I missed the joke because I didn't hit "show more"  - just saw my name  
and was dazzled ;-)
not that I would get teh joke anyway.. what is the word SUPPOSED to be?  
I plead ignorance to what a neutrino is - confessing before I google,

(inverted Catholic)

an

On 3/15/2017 5:57 PM, Gonz wrote:

Take it for a spin, you'll know.


On Wed, Mar 15, 2017 at 4:05 PM, John Francis  wrote:

On Wed, Mar 15, 2017 at 04:50:03PM -0400, Paul Stenquist wrote:

https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html

Hmmm.   Neutrino coating?  How do they get the neutrinos to stop?


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Re: Interesting Lens

[ann sanfedele]

BLACKSTONE lens?  has to be worth it.  ;-)

 (Not sure how many of you knew my maiden name is Blackstone - some 
should, because of a gallery on my web page. )


Someone should buy it for me - (yeah right, good luck with that , Ann)

a

On 3/15/2017 4:50 PM, Paul Stenquist wrote:

https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html



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Re: Interesting Lens

[Gonz]

Take it for a spin, you'll know.


On Wed, Mar 15, 2017 at 4:05 PM, John Francis  wrote:
> On Wed, Mar 15, 2017 at 04:50:03PM -0400, Paul Stenquist wrote:
>> https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html
>
> Hmmm.   Neutrino coating?  How do they get the neutrinos to stop?
>
>
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it still. Dorothea Lange

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Re: Interesting Lens

[P. J. Alling]

Jokes about the coating aside, the Firefly edition which I believe is 
identical optically is $200 US less, and the Samyang 14mm f2.8 is gets 
reviews on the same level as Zeiss Milvus for image quality, and is a 
whole 1/2 stop slower for $100 US less than that.



On 3/15/2017 4:50 PM, Paul Stenquist wrote:

https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html



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Re: Interesting Lens

[Mark Roberts]

Bob W-PDML wrote:

>> On 15 Mar 2017, at 21:06, John Francis  wrote:
>> 
>>> On Wed, Mar 15, 2017 at 04:50:03PM -0400, Paul Stenquist wrote:
>>> https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html
>> 
>> Hmmm.   Neutrino coating?  How do they get the neutrinos to stop?
>
>Charm. They keep them there with gluon.

That's a strange way of doing it.
 
-- 
Mark Roberts - Photography & Multimedia
www.robertstech.com





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Re: Interesting Lens

[Bob W-PDML]

> On 15 Mar 2017, at 21:06, John Francis  wrote:
> 
>> On Wed, Mar 15, 2017 at 04:50:03PM -0400, Paul Stenquist wrote:
>> https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html
> 
> Hmmm.   Neutrino coating?  How do they get the neutrinos to stop?
> 

Charm. They keep them there with gluon.


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Re: Interesting Lens

[Larry Colen]

On March 15, 2017 2:05:13 PM PDT, John Francis  wrote:
>On Wed, Mar 15, 2017 at 04:50:03PM -0400, Paul Stenquist wrote:
>>
>https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html
>
>Hmmm.   Neutrino coating?  How do they get the neutrinos to stop?

You're making the same stupid jokes as me, that's probably a sign you should 
worry about.
-- 
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Re: Interesting Lens

[Larry Colen]

Unfortunately that neutrino coating doesn't react with light or much anything 
else. I wonder how they get it to stick.

On March 15, 2017 1:50:03 PM PDT, Paul Stenquist  wrote:
>https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html

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Re: Interesting Lens

[John Francis]

On Wed, Mar 15, 2017 at 04:50:03PM -0400, Paul Stenquist wrote:
> https://www.bhphotovideo.com/c/product/1325637-REG/irix_il_15bs_pk_15mm_blackstone_lens_for.html

Hmmm.   Neutrino coating?  How do they get the neutrinos to stop?


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Re: Interesting lens on Ebay Pentax-A 70-200 F4

[brooksdj]

 This lens is currently for sale on Ebay, but 
it is not 
mentioned on either 
 Boz's or Stan's sites.
 My faith is shaken.
 
 http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItemitem=3806253160category=4688
 
 John

Looks very similar to my SMC A 70-210 F4, but the focus knurl is not quite the same and
the ap 
numbers are a different colour, as is the button on the right side.

Dave

Re: Interesting lens on Ebay Pentax-A 70-200 F4

[Fred]

 Being a lens snob, I'd never noticed the non-SMC lens section!

Har!  g

Fred

Re: Interesting lens on Ebay Pentax-A 70-200 F4

[Rfsindg]

John,
See Boz's site, Zoom's without SMC coating.  :-(
Regards,  Bob S.

John wrote:

 This lens is currently for sale on Ebay, but it is not mentioned on either
 Boz's or Stan's sites.
 My faith is shaken.
 
 http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItemitem=3806253
 160category=4688
 
 John

Re: interesting lens from Sigma

[Boris Liberman]

Hi!

CS http://www.dpreview.com/news/0403/04031601sigmalenses.asp

CS Depending on how good it is, it may replace my FAJ 18-35

Fascinating. Sigma introduced a whole bunch of lenses including
24-135/2.8-4.5 which is quite fast...

I really wonder how good/bad optically it could be and what big
players will do in response...

Funny, I should mention it, but it has a certain connection to the
thread about lens design history that I started some time ago...

I suspect that when my Sigma 28-135/3.8-5.6 was introduced similar
noise was made...

Boris
([EMAIL PROTECTED] or [EMAIL PROTECTED])

Re: interesting lens from Sigma

[alex wetmore]

On Tue, 16 Mar 2004, Christian Skofteland wrote:
 http://www.dpreview.com/news/0403/04031601sigmalenses.asp

 Depending on how good it is, it may replace my FAJ 18-35

How good do you think a slow 7x zoom will be?

My guess: not very good.

It will sell though, just like the 28-200 lenses sell, because it has
a high convinence factor.

alex

RE: interesting lens hack: CZ T* into K ?!?

[Mark Roberts]

Frantisek wrote:

   http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=1361462229

shows a CZ zoom which is supposedly made into K mount? I don't know
enough Deutsch to translate the bits about abblenden erfordelich.

Carl Zeiss (West)
Vario-Sonnar 3,5/40-80 T* für Pentax K
Sehr schöner Zustand wie neu - siehe Bild.

With the aid of Babelfish I can deduce that it's stop-down metering (no
auto-aperture coupling) and that they suggest it would be of interest to
collectors (rather than people who are looking for something usable, I suppose).

Is it possible it's been adapted and it works?!? Seems quite strange.
But again, it's said the K and CY mounts were result of the joint of
Zeiss/Pentax back in 70s...

Well, the film-plane to lens-flange distance is the same for both mounts,
but since this conversion forces you to use stop-down metering, they apparently
don't have much else in common.

-- 
Mark Roberts
www.robertstech.com
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Re: Interesting lens

[T Rittenhouse]

I guess you mean French cars, since I don't recall that Angenieux made cars.
Strangely French lenses have a great reputation. Angenieux made great 16mm
motion picture lenses. I have not use their still lenses, but Leica used to
sell them in mounts for the R series cameras, that ought to say something.
There is another French lenses company that make lenses that are reputed to
be some of the best in the world, Kinoptic.

Ciao,
Graywolf
http://pages.prodigy.net/graywolfphoto



- Original Message -
From: Collin Brendemuehl [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, March 08, 2002 9:47 PM
Subject: Interesting lens


 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=1338194915

 I'm not a fan of their cars, but their LF lenses
 were pretty nice.  How does this 35mm unit
 stack up against the rest of the breed?

 *
 Get over it.
   Dr. Laura

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Re: Interesting lens design bokeh explained

[Stan Halpin]

My first SLR was a Nikkormat, in 1968. I had two lenses, a 50/2 and the
older 105/2.5 discussed here. The 105 was used for about 75% of all shots I
took. I switched from the Nikkormat to an OM-1 for smaller size and hoped
for better metering. My biggest regret was giving up that 105. Truly one of
the great masterpieces.

I've spent the last couple of days looking through slides taken on a '69
trip to Argentina. Ah, to be young again and be able to steadily hand-hold
twilight shots on ASA 25 film . . .

Stan 

 From: Ed Mathews [EMAIL PROTECTED]
 Reply-To: [EMAIL PROTECTED]
 Date: Mon, 31 Dec 2001 18:46:45 -0500
 To: [EMAIL PROTECTED]
 Subject: Interesting lens design  bokeh explained
 
 Sorry that this is referring to a Nikkor, but this makes a real
 interesting read for anybody interested in bokeh:
 
 http://www.nikon.co.jp/main/eng/society/nikkor/n05_e.htm
 
 Thanks,
 Ed
 http://lightandsilver.com
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Re: Interesting lens design bokeh explained

[Rob Studdert]

On 31 Dec 2001 at 18:46, Ed Mathews wrote:

 Sorry that this is referring to a Nikkor, but this makes a real
 interesting read for anybody interested in bokeh:
 
 http://www.nikon.co.jp/main/eng/society/nikkor/n05_e.htm

Hi Ed,

It just goes to show how personal the interpretation of the quality of bokeh 
can be. In the article you referred to at least one of the images refered to as 
having good bokeh (n05-p2l_i.jpg) shows in the background indications of the 
unpleasant hard edged bokeh typical of a few Nikkor lenses that I have used.

Cheers,
Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT)  +10 Hours
[EMAIL PROTECTED]
http://members.ozemail.com.au/~distudio/publications.html
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RE: Interesting lens design bokeh explained

[Rob Studdert]

On 1 Jan 2002 at 17:52, Ed Mathews wrote:

 It is very personal indeed.  I found the bokeh on all the shots to be
 very pretty, and very similar to what I get with the 77 F1.8 Ltd.
 Highlights take on a very distinct and recognizable circular pattern.

Hi Ed,

Ok, my favourite lenses produce an indiscernible melding of the images OOF 
back/fore ground, I don't wish the OOF areas to have shape of their own, this 
is why I find this image so distracting. If the 77Ltd behaves like this I'm not 
interested in it one iota. See my classic Nikkor 50f1.4 woeful bokeh shot:

http://www.home.aone.net.au/audiobias/bw0503.jpg

Cheers,

Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT)  +10 Hours
[EMAIL PROTECTED]
http://members.ozemail.com.au/~distudio/publications.html
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RE: Interesting lens design bokeh explained

[Dan Scott]

Hi Rob,

I have a shot taken with the 77/1.8 in this month's PUG,
http://pug.komkon.org/02jan/dad.html .

Bokeh is decent, I think. The three highlights in the upper left are
reflections on the window from some lights to the far right, and the
horizontals and verticals are aluminum bar stock and window channels
against a sheetrock wall. Not as jittery as your Nikon.

Dan Scott
[EMAIL PROTECTED]

Rob Studdert
Hi Ed,

Ok, my favourite lenses produce an indiscernible melding of the images OOF
back/fore ground, I don't wish the OOF areas to have shape of their own, this
is why I find this image so distracting. If the 77Ltd behaves like this
I'm not
interested in it one iota. See my classic Nikkor 50f1.4 woeful bokeh shot:

http://www.home.aone.net.au/audiobias/bw0503.jpg
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RE: Interesting lens design bokeh explained

[Ed Mathews]

Rob,
 I've seen this shot of yours before, and indeed it is ugly.  But
these OOF areas have an edge to them that is more defined and dense than
the inner surrounding area, more like a donut produced by a mirror lens.
No Nikkor or Pentax lens that I have has ever exhibited that.  And if I
recall, you had said before that this was a 50mm Nikkor?  I've got an
AIS 50mm F1.4 and an AF 50mm F1.8 and neither is close to being like
what you show here.  To me, the 77 produces oval or egg shaped specular
highlights which are smooth and equal in density from edge to center.  I
think they exhibit some coma also because their shape changes in
different parts of the frame.  I've seen similar results from some Leica
glass.  I guess some like it and some don't.  In non specular OOF areas,
the transitions are very smooth, and there's nothing to dislike about
that by anybody.

Thanks,
Ed
http://lightandsilver.com 

 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED]] On Behalf Of Rob Studdert
 Sent: Tuesday, January 01, 2002 7:39 PM
 To: [EMAIL PROTECTED]
 Subject: RE: Interesting lens design  bokeh explained
 
 
 On 1 Jan 2002 at 17:52, Ed Mathews wrote:
 
  It is very personal indeed.  I found the bokeh on all the 
 shots to be 
  very pretty, and very similar to what I get with the 77 F1.8 Ltd. 
  Highlights take on a very distinct and recognizable 
 circular pattern.
 
 Hi Ed,
 
 Ok, my favourite lenses produce an indiscernible melding of 
 the images OOF 
 back/fore ground, I don't wish the OOF areas to have shape of 
 their own, this 
 is why I find this image so distracting. If the 77Ltd behaves 
 like this I'm not 
 interested in it one iota. See my classic Nikkor 50f1.4 
 woeful bokeh shot:
 
http://www.home.aone.net.au/audiobias/bw0503.jpg

Cheers,

Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT)  +10 Hours
[EMAIL PROTECTED]
http://members.ozemail.com.au/~distudio/publications.html
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