Photoshop How To Use: rec.photo.digital - 15 new messages in 10 topics

rec.photo.digital
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Today's topics:

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TOPIC: Webcam vs DSLR Target Field of View
http://groups.google.com/group/rec.photo.digital/t/d0a7b8fbb27d6247?hl=en
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== 1 of 3 ==
Date: Fri, Apr 24 2009 4:55 pm
From: RonTheGuy@null.com (Ron)

Me <user@domain.invalid> wrote:

> Hughes wrote:
> > On Apr 24, 10:05 pm, Savageduck <savaged...@savage.net> wrote:
> >> ASAAR wrote:
> >>> On Fri, 24 Apr 2009 16:19:53 +1200, Me wrote:
> >>>> That's a really dumb question with an obvious answer. Either you've
> >>>> been reading far too much for your mind to digest (but are capable of
> >>>> regurgitating parts of it in a semi-coherent manner), or you're a troll.
> >>>> I'll give you the benefit of the doubt and suspect that it's just the
> >>>> latter, because I really wouldn't want to call you an idiot, as I'm
> >>>> usually too polite.
> >>> Because he simultaneously demonstrates knowledge, extreme
> >>> ignorance and a screwy lack of logic, Hughes can only be out for a
> >>> lark, a troll's walk in the park. I mean, instead of talking
> >>> pixels, he refers to sensels, yet hasn't a clue about cheap webcam
> >>> sensors. It wouldn't surprise me if this wasn't our pathetic
> >>> anti-DSLR sock puppet troll, tired of his old persona and trying a
> >>> new one on for size.
> >> I have to agree.
> >>
> >> This OP and the evidence of the "Matching Pixel Size and Telescope"
> >> debate together with his posts as "Eugene" seem to have established
> >> "Hughes" troll credentials.
> >>
> >> He is in total "mind fuck" mode.
> >>
> >> He may not be a troll, just blind to the ridiculousness of all of his
> >> posts. He may be sincere in hia alleged intellectual pursuit, but there
> >> is an esoteric quality to all of his posts which are beyond wacky.
> >>
> >> To "Hughes"
> >> If you are still into the "astrophotography" stuff
try:http://www.telescope.com/control/category/~category_id=astro-imaging
_...
> >>
> >> Regards,
> >> Savageduck- Hide quoted text -
> >>
> >> - Show quoted text -
> >
> > Naw. I just want to know how big is airy disc in each picture,
> > especially terrestrially.
> >
> > Now with many data shared by you guys, I now have narrowed
> > it to the following possibilities.
> >
> > For my Rubinar 4" Telephoto F/10 with 1.16 arcsecond dawes' limit
> > and 1000mm focal length.
> >
> > 1.16 arcsecond/2 = 206265 x pixel pitch/1000mm
> > optimal pixel pitch = 2.8 micron
> >
> If you can get your telescope to resolve at a level that makes a pixel
> pitch of 2.8 microns worthwhile (ie about equivalent to 40 megapixels
> give or take a few million at APS-C size), then I'll consume a pound of
> butter washed down with a pint of warm beer, video the result and post
> it on you tube, and post the link for your viewing pleasure.
> At f10 airy disk diameter is about 4x that pixel pitch, and the system
> is (severely) diffraction limited.
> Somewhere back in one of your threads you came to your own conclusion
> that pixel pitch of an old Canon 300d might be okay. You should have
> stuck with that. IIRC though, the 300d doesn't have MLU (without
> firmware hack).

Use the self-timer to get around the lack of MLU.

== 2 of 3 ==
Date: Fri, Apr 24 2009 7:33 pm
From: Bob Larter

David J Taylor wrote:
> Hughes wrote:
> []
>> Details:
>> 1/4" color progressive CMOS
>> 640×480pixels
>>
>> Lens Specification
>> F=2.4,f=4.9mm,View Angle 54
>>
>> See:
>> http://www.a4tech.com/ennew/product.asp?cid=77&scid=89&id=253
>
> So the lens has an entrance pupil of 2mm when wide open. Are you
> matching your telescope to that?

He says he's removed the lens. I have no idea how he's attached the
reflector to his webcam, & I'm a little scared to ask. ;^)

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------

== 3 of 3 ==
Date: Fri, Apr 24 2009 7:35 pm
From: Bob Larter

Hughes wrote:
[...]
> Now what's left to do is to look for the best webcam
> in the world. But first something I noticed. Digicam
> has pixel pitch the size of 2 micron while Webcam
> has pixel pitch the size of 5 micron. Why is the pixel
> pitch of Webcam larger?

Because it's much lower resolution than a digicam.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------

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TOPIC: B&W photography
http://groups.google.com/group/rec.photo.digital/t/2d29e1d10678cd2d?hl=en
==============================================================================

== 1 of 2 ==
Date: Fri, Apr 24 2009 5:54 pm
From: Nicko

On Apr 23, 11:58 pm, "Willem Wernsen" <fotowil...@planet.nl> wrote:
> Updated my photoweblog
>
> B&W photography
>
> www.fotowillem.com/weblog
>
> Comments and critiques are welcom

FWIW:

The white borders are almost painfully distracting, as is the white
font color. Otherwise, it's pretty nice layout.

I don't read Dutch, so I cannot comment on the written content.

--
YOP...

== 2 of 2 ==
Date: Fri, Apr 24 2009 6:27 pm
From: tony cooper

On Fri, 24 Apr 2009 17:54:07 -0700 (PDT), Nicko
<nervous.nick@gmail.com> wrote:

>On Apr 23, 11:58 pm, "Willem Wernsen" <fotowil...@planet.nl> wrote:
>> Updated my photoweblog
>>
>> B&W photography
>>
>> www.fotowillem.com/weblog
>>
>> Comments and critiques are welcom
>
>FWIW:
>
>The white borders are almost painfully distracting, as is the white
>font color. Otherwise, it's pretty nice layout.

Just goes to show. I would use the white borders too. When I submit
Shoot In entries, I select all and do a 3 pixel white stroke because
the PBase background - like this page - is black. The border shows
where the photograph ends and the background begins.

I also like the white letters. All in all, it's a good looking
effort.

We do agree on the Dutch not being understandable.

--
Tony Cooper - Orlando, Florida

==============================================================================
TOPIC: canon ps sx1 raw -> adobe camera raw
http://groups.google.com/group/rec.photo.digital/t/95ee196915c03e6a?hl=en
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== 1 of 1 ==
Date: Fri, Apr 24 2009 6:19 pm
From: sobriquet

Hi.

Since the recent firmware update, it's possible to shoot raw images
with the canon powershot
sx1 (.cr2 files).

The camera raw plugin for photoshop cs4 (version 5.3) however, doesn't
recognize these raw files yet, and the standard utility that canon
provides, "Digital Photo Professional" (version 3.6), can't save to
DNG or some other format that is compatible with camera raw.
I can save it as a 16 bit tif file and open it, but I don't know if
that has any drawbacks compared to using the original raw files or the
dng file format.

What's the best way to import those raw files into camera raw?

Greetings and thx in advance for any suggestions, Niek

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TOPIC: Why DSLR mirrors must eventually go
http://groups.google.com/group/rec.photo.digital/t/68febc4ea5622551?hl=en
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== 1 of 1 ==
Date: Fri, Apr 24 2009 6:19 pm
From: "Neil Harrington"

"Wilba" <usenet@CUTTHISimago.com.au> wrote in message
news:01fe3973$0$20652$c3e8da3@news.astraweb.com...
> Neil Harrington wrote:
>>> Wilba wrote:
>>>>
>>>> Leaving aside the ergonomics of manual focus, would it be practical
>>>> to focus by moving the sensor, thus doing away with focus within the
>>>> lens?
>>
>> Some other camera makers did, e.g. the Revere 33 stereo camera focused
>> by moving the pressure plate. But that had fixed lenses, of course. I
>> think there would be a problem trying to do that with interchangeable
>> lenses.
>
> What kinda problem?

With a conventional long lens for example, the forward lens movement to come
to near focus is relatively large. I doubt you could design a moving sensor
that would be able to move back far enough to accomplish the same change in
focus.

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TOPIC: new cheap wholesale original brand 3G iphone 16gb
http://groups.google.com/group/rec.photo.digital/t/d2c083c47b5e1e29?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Apr 24 2009 6:25 pm
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TOPIC: 210$ hot! wholesale brand original Nokia E90 ,n95
http://groups.google.com/group/rec.photo.digital/t/c53823a42369d187?hl=en
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== 1 of 1 ==
Date: Fri, Apr 24 2009 6:30 pm
From: peer88

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http://groups.google.com/group/rec.photo.digital/t/3b7c920ba090a741?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Apr 24 2009 6:31 pm
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TOPIC: Canon DSLR Live View
http://groups.google.com/group/rec.photo.digital/t/21ca0cd9457ba13c?hl=en
==============================================================================

== 1 of 2 ==
Date: Fri, Apr 24 2009 7:45 pm
From: Bob Larter

nospam wrote:
> In article <49f16b2c$0$1629$742ec2ed@news.sonic.net>, Ray Fischer
> <rfischer@sonic.net> wrote:
>
>>>> The original IBM PC...
>>> that was definitely proprietary.
>> The manual that came with it included a diagram of the electronics and
>> a listing of the BIOS. Hardly proprietary since anyone could develop
>> software/hardware for the machine.
>
> those who tried got sued. the publishing of the bios listing (which
> wasn't included with every machine) was to make cloning legally harder
> since ibm could (and did) claim people were illegally copying it.
> several were sued, and not until cloners did a clean room reproduction
> did the flood of clones begin. plus pc-dos was not exactly the same as
> ms-dos.

That's not the whole truth. The people getting sued were those trying to
clone the PC itself, not people who were merely designing expansion
cards for it.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------

== 2 of 2 ==
Date: Fri, Apr 24 2009 7:56 pm
From: Bob Larter

Dudley Hanks wrote:
> "Ray Fischer" <rfischer@sonic.net> wrote in message
> news:49f16b2c$0$1629$742ec2ed@news.sonic.net...
>> nospam <nospam@nospam.invalid> wrote:
>>> Dudley Hanks
>>>>>>> Has Sony ever made a product that wasn't proprietary and worked
>>>>>>> well?
>>>>>> How could a company make anything which wasn't proprietary?
>>>>> by using existing standards, not inventing their own like memory
>>>>> stick.
>>>> The original IBM PC...
>>> that was definitely proprietary.
>> The manual that came with it included a diagram of the electronics and
>> a listing of the BIOS. Hardly proprietary since anyone could develop
>> software/hardware for the machine.
>>
>> Of course, they were just copying what Apple had done with the Apple II.
>>
>> --
>> Ray Fischer
>> rfischer@sonic.net
>>
>
>
> Ray, I think IBM came out with the PC XT prior to the Apple II.

Definitely not! The original PC (not XT) came out in 1981, while the
Apple II came out in 1977.

<http://en.wikipedia.org/wiki/IBM_Personal_Computer>
<http://en.wikipedia.org/wiki/Apple_Inc.>

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------

==============================================================================
TOPIC: Matching Pixel Size and Telephoto
http://groups.google.com/group/rec.photo.digital/t/75c4b5506848d404?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Apr 24 2009 7:49 pm
From: Rich

Hughes <eugenhughes@gmail.com> wrote in news:73e6a9a3-3c81-4758-b9da-
ebfde76e42c3@c18g2000prh.googlegroups.com:

> Hi,
>
> My experience is mostly on astronomical telescopes
> and I now want to view terrestrial daytime subject
> like sceneries or trees/nature.
>
> I have a 4" 1000mm F/10 Telephoto. I want to get
> a digicam that can produce the optimum image
> quality.

If that's one of those old white Meade SCT's you've got (2045's), the
optics aren't good enough to be worrying about the camera. Likely 6
megapixels would be sufficient.

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TOPIC: Great forum!
http://groups.google.com/group/rec.photo.digital/t/ac2220a39a1c052b?hl=en
==============================================================================

== 1 of 2 ==
Date: Fri, Apr 24 2009 10:23 pm
From: "Atheist Chaplain"

"Focus" <dont@mail.me> wrote in message
news:O5ednaG9S-DnPmzUnZ2dnUVZ8gednZ2d@novis.pt...
>
> "Paul Bartram" <paul.bartram AT OR NEAR lizzy.com.au> wrote in message
> news:49effb50$0$14218$c30e37c6@pit-reader.telstra.net...
>>
>>> "^Tems^" <stevebrooks13@live.com> wrote:
>>
>>> A great forum with 7 posts with all but one of these made by Paul
>>> Bertram
>>
>> Wow, nearly had a seizure there. Had to go look to make sure I hadn't had
>> my identity stolen, but the surname is spelt differently!
>>
>> Paul
>
>
> Funny: he counts the posts, but reverses my name. And you too.
>
> ---
> Bertram Paul
> http://atlantic-diesel.com
> Digital Photography Forum
>

I notice that for such a "Great Forum" there are only 3 posters and you have
made (according to your profile) 582 of them.
--
[This comment is no longer available due to a copyright claim by Church of
Scientology International]
"I like your Christ. I do not like your Christians. They are so unlike your
Christ." Gandhi

== 2 of 2 ==
Date: Fri, Apr 24 2009 10:29 pm
From: "Paul Bartram"

"Focus" <dont@mail.me> wrote

> Funny: he counts the posts, but reverses my name. And you too.

Yes, I'm aware 'Bertram' has been used as a given name for a long time (I
think 'Bertie' is the common shortened version, as in Bertie Wooster, the
fictional character from the 1900s.) Also 'Paul' is a fairly common family
name (as in 'Henri Paul', Princess Di's driver.) However, this is the first
time I've seen the two together, so naturally I think of the names the
'other way round', like mine!

Paul

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