RE: PESO - The Naked Violinist

[Malcolm Smith]

Marco Alpert wrote:

http://www.alpert.com/marco/photo16/peso38.html
+++

Very nice. Another interesting find, captured well. 

Malcolm


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RE: PESO - 'On the Dew Line'

[Malcolm Smith]

Ken Waller wrote:

http://photo.net/photodb/photo?photo_id=18319419


I can imagine this as a very large print. Like a lot.

Malcolm


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Re: PESO - The Naked Violinist

[Philip Northeast]

lovely effect with the shallow DOF, excellent tone and contrast as usual

Philip Northeast

www.aviewfinderdarkly.com.au

On 8/12/16 3:58 pm, Marco Alpert wrote:

Totally safe for work (sorry):

http://www.alpert.com/marco/photo16/peso38.html

Comments, as always, welcomed.

-Marco

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PESO - The Naked Violinist

[Marco Alpert]

Totally safe for work (sorry):

http://www.alpert.com/marco/photo16/peso38.html

Comments, as always, welcomed.

-Marco

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Re: PESO - Stoli

[Marco Alpert]

Thanks, Larry. (Let’s do lunch again one of these days and I’ll tell all.)

m

> On Dec 7, 2016, at 2:21 PM, Larry Colen  wrote:
> 
> 
> 
> Marco Alpert wrote:
>> http://www.alpert.com/marco/photo16/peso37.html
> 
> Great shot, but I can't find the other two people. :-)
> One of these days I need to learn how you get such nice tonality out of your 
> black and whites.
>> 
>> Comments, as always, welcomed.
>> 
>> -Marco
>> 
>> ---
>> http://www.alpert.com/marco
>> 
> 
> -- 
> Larry Colen  l...@red4est.com (postbox on min4est)


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Re: PESO - 'On the Dew Line'

[Rick Womer]

Ken, I like the pun--one can imagine the web as a radar dish!

I think the photo needs more contrast; one could make the background much 
darker.

Cheers,

Rick

On Dec 7, 2016, at 1:15 PM, Ken Waller wrote:

> Taken early on a late summer morning in Seney National Wildlife Refuge in the 
> Upper Peninsula of Michigan.
> 
> K-3, 300mm f4.5, 1/50 @ f11, 100 ISO
> 
> Comments appreciated.
> 
> http://photo.net/photodb/photo?photo_id=18319419
> 
> 
> Kenneth Waller
> http://www.pentaxphotogallery.com/kennethwaller 
> 
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Re: PESO - Stoli

[Larry Colen]

Marco Alpert wrote:

http://www.alpert.com/marco/photo16/peso37.html


Great shot, but I can't find the other two people. :-)
 One of these days I need to learn how you get such nice tonality out 
of your black and whites.


Comments, as always, welcomed.

-Marco

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Re: PESO:black and white cottage

[ann sanfedele]

Neo-Pennsylvanian

ann


On 12/7/2016 1:03 PM, mike wilson wrote:



On 07 December 2016 at 07:16 Malcolm Smith  wrote:


Philip Northeast wrote:

https://flic.kr/p/PJY6zP
=

Interesting building,

The relatively unknown Australian Tudor period.  Recently overtaken by Republic
of Vulgaria style, from all I hear.




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Re: Tonight I got a little Messier

[Larry Colen]

Matthew Hunt wrote:

On Wed, Dec 7, 2016 at 2:22 AM, Larry Colen  wrote:


In simple terms, the definition of infinity focus would be to have parallel
incident light rays. Divergent rays from a point source are closer than
infinity. One could probably set up a calibration unit with parallel light
rays using conventional optics. I suspect that a low powered laser would
also work.


In case it helps your googling, what you're trying to achieve is
"collimation" of light.

When I taught astronomical instrumentation lab, we achieved this on
the bench with a white light shining onto a spatial filter (basically
a pinhole), with the spatial filter located in the focal plane of a
Nikon 200/2.8 or 300/4 lens (which was "locked down" to infinity
focus). The light coming out the front of the lens was (reasonably)
collimated. If you picture parallel rays coming from a star on the sky
and being focused to a point on the sensor, it's exactly that, except
the light is moving in reverse.


Once again proving the adage that the fastest way to get the right 
answer is to post the wrong one on the internet.


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Re: PESO:black and white cottage

[John]

Kind of reminds me of Cheyenne Mountain in Colorado Springs, CO (where
the NORAD complex is buried).

When you first get to Fort Carson, you can see a large number of radio
masts on top of the mountain. After you've been there a while, you find
out all those radio masts belong to local TV & radio stations. The
military has no facilities on TOP of the mountain.

NORAD's communication facilities are buried in the mountain side. Don't
ask me how underground radio antennas work, because I never did figure
it out.


On 12/7/2016 3:22 AM, Philip Northeast wrote:

Malcolm
This the view defines Hobart to a degree, the city squeezed between the
river and Mt Wellington, note the communications/TV  towers on top

https://flic.kr/p/KitJnt

Philip Northeast

www.aviewfinderdarkly.com.au

On 7/12/16 6:16 pm, Malcolm Smith wrote:

Philip Northeast wrote:

https://flic.kr/p/PJY6zP
=

Interesting building, I take it near the top of a hill? Odd, for
buildings
where I am not to have TV aerials mounted as high up as possible
(chimney),
wires being fed in lower than gutter height, and is that a galvanised
sheet
roof?

Malcolm






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PESO - 'On the Dew Line'

[Ken Waller]

Taken early on a late summer morning in Seney National Wildlife Refuge in 
the Upper Peninsula of Michigan.


K-3, 300mm f4.5, 1/50 @ f11, 100 ISO

Comments appreciated.

http://photo.net/photodb/photo?photo_id=18319419


Kenneth Waller
http://www.pentaxphotogallery.com/kennethwaller 



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RE: PESO:black and white cottage

[mike wilson]

> On 07 December 2016 at 07:16 Malcolm Smith  wrote:
> 
> 
> Philip Northeast wrote:
> 
> https://flic.kr/p/PJY6zP
> =
> 
> Interesting building, 

The relatively unknown Australian Tudor period.  Recently overtaken by Republic
of Vulgaria style, from all I hear.

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Re: Tonight I got a little Messier

[Gonz]

Lovely shots of M31, my favorite "close" object.


On Tue, Dec 6, 2016 at 5:57 PM, Larry Colen  wrote:
>
>
> Gonz wrote:
>>
>> Interesting capture of M42. I remember the first time I saw M42 with
>> an 8" scope at the top of the Green building in Cambridge MA.  It blew
>> me away.  Have you tried M31?
>
>
> Now that I'm home, here's a link to my astro collection on flickr:
> https://www.flickr.com/photos/ellarsee/collections/72157627826423347/
>
>
>>
>>
>> Here is a pic of M42 taken by Hubble that is drool worthy:
>>
>> https://en.wikipedia.org/wiki/List_of_Messier_objects#/media/File:Orion_Nebula_-_Hubble_2006_mosaic_18000.jpg
>
>
> Photos like that are why I don't make serious attempts at astro photography.
> That's about as high end as you can get when it comes to gear, but it shows
> that there pretty much is no limit on what you can spend to get astro shots.
>
>
>>
>>
>> On Tue, Dec 6, 2016 at 12:27 PM, Larry Colen  wrote:
>>>
>>>
>>> Jostein wrote:



 Den 04.12.2016 20.47, skrev Larry Colen:
>
> I tried that once and didn't have any luck with the software I used, it
> wasn't significantly better than what I got with one frame. I'm curious
> if anybody has stacking software they like that runs on macs (or linux)


 If it's been a while since last time, maybe you want to try out one of
 the new kids on the block, StarTools:
 http://www.startools.org/
>>>
>>>
>>>
>>> Thanks a bunch!  It looks interesting.
>>>
 Jostein

>>> --
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>>>
>>>
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>>> follow the directions.
>>
>>
>>
>>
>
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>
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Re: Tonight I got a little Messier

[Matthew Hunt]

On Wed, Dec 7, 2016 at 2:22 AM, Larry Colen  wrote:

> In simple terms, the definition of infinity focus would be to have parallel
> incident light rays. Divergent rays from a point source are closer than
> infinity. One could probably set up a calibration unit with parallel light
> rays using conventional optics. I suspect that a low powered laser would
> also work.

In case it helps your googling, what you're trying to achieve is
"collimation" of light.

When I taught astronomical instrumentation lab, we achieved this on
the bench with a white light shining onto a spatial filter (basically
a pinhole), with the spatial filter located in the focal plane of a
Nikon 200/2.8 or 300/4 lens (which was "locked down" to infinity
focus). The light coming out the front of the lens was (reasonably)
collimated. If you picture parallel rays coming from a star on the sky
and being focused to a point on the sensor, it's exactly that, except
the light is moving in reverse.

We then sent the collimated light into rudimentary lenses (e.g.
achromatic doublets) and viewed the spots produced, to compare the
actual aberrations with predicted spot diagrams from optical design
software.

The big caveats are:
1) Your collimating lens has to be focused at infinity and the right
distance from the point source, or the light that comes out isn't
collimated (it will "look" closer or farther than infinity). So this
just shifts the problem of finding infinity focus to another optic!
You may be able to get calibrated collimating lenses, making it a
mechanical positioning problem.
2) At least if you're trying to evaluate aberrations of the optics
under test, the collimating lens has to be optically superior to the
test lens, or its own aberrations will come into play. In our case,
with good Nikon lenses against doublets or triplets, this was the
case.

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Re: December PUG is Up

[David Mann]

On Dec 7, 2016, at 7:56 AM, John  wrote:

> Right now, I'm reduced to what I can do with a microwave oven & whatever
> small appliances I can temporarily place on top of it and having to wash
> dishes in the bathroom sink.

Luxury!  We had to eat half a handful of freezing cold gravel... actually we 
were surviving on takeaways for a few days.  We also used the microwave and the 
bathroom handbasin :)

The poor electrician had a long day today, he went home around 8:30pm but 
managed to get everything sorted out so we were able to cook again.  I'm liking 
the new induction cooktop but it's going to take a little getting used to.  
Just need to get the dishwasher installation finalised and we'll be fully 
functional.

The flooring goes in next Monday and I'll work out the lighting and final 
decorating at some stage.  Don't ask how much this is all costing :(

Cheers,
Dave


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RE: PESO:black and white cottage

[Malcolm Smith]

Philip Northeast wrote:

This the view defines Hobart to a degree, the city squeezed between the
river and Mt Wellington, note the communications/TV  towers on top

https://flic.kr/p/KitJnt
++

Thanks for that - great picture as well!

Malcolm 


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RE: PESO:black and white cottage

[Malcolm Smith]

Philip Northeast wrote:

yes it is glavanised  steel roofing, a common roofing material in Australia.

The TV antenna does not need to be high as the transmission towers for
broadcast TV are on a mountain that is close by, so clear line of sight.

The positioning of power entry wires are a bit unusual, but this house is
not typical of local architecture. This is one of the reasons for
photographing it.
++

Thanks Phillip, very interesting.

Malcolm


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Re: PESO:black and white cottage

[Philip Northeast]

Malcolm
This the view defines Hobart to a degree, the city squeezed between the 
river and Mt Wellington, note the communications/TV  towers on top


https://flic.kr/p/KitJnt

Philip Northeast

www.aviewfinderdarkly.com.au

On 7/12/16 6:16 pm, Malcolm Smith wrote:

Philip Northeast wrote:

https://flic.kr/p/PJY6zP
=

Interesting building, I take it near the top of a hill? Odd, for buildings
where I am not to have TV aerials mounted as high up as possible (chimney),
wires being fed in lower than gutter height, and is that a galvanised sheet
roof?

Malcolm




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Re: PESO:black and white cottage

[Philip Northeast]

Malcolm,

yes it is glavanised  steel roofing, a common roofing material in 
Australia.


The TV antenna does not need to be high as the transmission towers for 
broadcast TV are on a mountain that is close by, so clear line of sight.


The positioning of power entry wires are a bit unusual, but this house 
is not typical of local architecture. This is one of the reasons for 
photographing it.




Philip Northeast

www.aviewfinderdarkly.com.au

On 7/12/16 6:16 pm, Malcolm Smith wrote:

Philip Northeast wrote:

https://flic.kr/p/PJY6zP
=

Interesting building, I take it near the top of a hill? Odd, for buildings
where I am not to have TV aerials mounted as high up as possible (chimney),
wires being fed in lower than gutter height, and is that a galvanised sheet
roof?

Malcolm




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Re: Tonight I got a little Messier

[Subash Jeyan]

i always assumed other adjustments were done with other
programmes and one used something like starstax for stacking. stacking
multiple milky way photographs and creating star trail photographs was
what led me to it in the first place but i am just starting out...and
have absolutely no experience of other/similar software.

~subash

On Wed, 7 Dec 2016 08:57:39 +0100
Jostein  wrote:

> IIRC, StarStax is okay for blending the exposures, but not much else. 
> It's a very basic piece of software.
> However it's very cool for creating looong star trails from
> individual exposures.
> Jostein
> 
> Den 07.12.2016 03.46, skrev Subash Jeyan:
> > On Sun, 04 Dec 2016 11:47:34 -0800
> > Larry Colen  wrote:
> >  
> >> I tried that once and didn't have any luck with the software I
> >> used, it wasn't significantly better than what I got with one
> >> frame. I'm curious if anybody has stacking software they like that
> >> runs on macs (or linux)  
> >
> > StarStaX is a good option (a free application for windows,
> > mac and linux; the linux version is at 0.60 and the windows/mac
> > versions are at 0.71):
> >
> > http://www.markus-enzweiler.de/StarStaX/StarStaX.html
> >
> > there are excellent tutorials available and there is a flickr group
> > too...
> >
> > ~subash
> >  
> 


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RE: Tonight I got a little Messier

[Malcolm Smith]

Larry Colen wrote:

Thank you. Do you mean from the july 4 mount hamilton set?
https://www.flickr.com/photos/ellarsee/sets/72157667869222073/
+++

I do indeed. Lovely set.

Malcolm


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