HDTenEightyP/NetNews huggingface dataset:
From: robert@sys.sweden.dg.com (Robert Claeson)
Newsgroups: rec.photo,rec.backcountry
Subject: Re: What tripod do you use when backpacking?
Date: 11 Sep 92 08:02:35 GMT
Organization: Data General AB, Akalla, Sweden

In article <18ml7sINNkcj@hpsdlss3.sdd.hp.com>, johno@sdd.hp.com (John Ongtooguk) writes:
> In article <1992Sep9.141109.19044@sys.sweden.dg.com>, robert@sys.sweden.dg.com (Robert Claeson) writes:

> |> Yes, the Benbo tripods are very rugged and works great, but they are
> |> somewhat heavy, too. The Trekker is a smaller tripod, but I wouldn't
> |> say it can hold a 400mm lens steady. It has problems with my 80-200/2.8
> |> zoom. I'd use the Benbo Mk. 1 tripod instead.
> 
>    The 80-200 f2.8 doesn't have a tripod collar as I recall, which the
>    400 may have.

You must be talking about the Nikon 80-200/2.8. My Canon 80-200/2.8
does have a tripod collar.

-- 
------------------------------ END OF MESSAGE ------------------------------
Robert Claeson                Internet: robert@sys.sweden.dg.com
Data General AB                         robert@sys.dg.se
Box 28                             CEO: robert@sys.sweden.dg.com:dg-smtp
S-164 93 KISTA                     Tel: +46 (0)8-92 55 00
Sweden                             Fax: +46 (0)8-751 36 22
Xref: sparky rec.photo:15734 alt.cd-rom:3002 gnu.misc.discuss:2949 misc.int-property:933
From: bc@Apple.COM (bill coderre)
Newsgroups: rec.photo,alt.cd-rom,gnu.misc.discuss,misc.int-property
Subject: Re: Photo CD patent info
Date: 8 Sep 92 18:09:31 GMT
Organization: Apple Computer Inc, Cupertino, CA

brown@quorum.com (Robert E. Brown) writes:
|Here is some information I got when I called Kodak.

Thanks for all the information. Would someone like to find the exact
patent number and mention what it contains?

bill coderre
mildly interested
Newsgroups: rec.photo
Subject: Re: NEED INFO ON NIKON ME.  PLEASE!!!!(grovel..grovel.grovel)
From: fred-mckenzie@ksc.nasa.gov (Fred McKenzie)
Date: 15 Sep 92 10:55:29 EST
Followup-To: rec.photo
Distribution: world
Organization: NASA/Kennedy Space Center, Florida

In article <1992Sep15.053340.13340@iitmax.iit.edu>, keivjam@elof.iit.edu
(James Keivom) wrote:
> would anyone know anything about the Nikon ME.  i know someone with
> a Nikon E and its supposed to be good.  Would anyone know anything
> about this model and is it similar to the Nikon E.  whats its week
> points...forget the spelling mistakes...is it good for a first
> camera.  someone is selling it for $115.  is that a good price.

jim-

Could you be refering to the Nikon model EM?  If so, the EM is about 15
years old, and was sort of a bottom-of-the-line camera using a lot of
plastic, made to compete with the economy models of other major brands.

I don't mean to demean the EM.  It is a good camera, manual focus,
automatic only (aperture priority).  It was sold with the Nikon "E" series
lenses, which were optically fairly good but less rugged than regular
Nikkor's.  Most modern Nikkor lenses will work with it.

I paid about $105 for an excellent EM with 50/1.8 series E lens, about 3
years ago.  This seems to be the ball-park for used prices, since it is a
fairly common camera on the used market.

fred-mckenzie@ksc.nasa.gov
From: TSOS@uni-duesseldorf.de (Detlef Lannert)
Newsgroups: rec.photo
Subject: T stops (was: Designing fast non-50mm lenses)
Date: Tue, 8 Sep 1992 13:13:37 GMT
Organization: Universitaetsrechenzentrum, Heinrich-Heine-Universitaet, Duesseldorf
NNTP-Posting-Host: lannert.rz.uni-duesseldorf.de
Keywords: T-stops, f-numbers

Oops! In a previous posting I stated that the front element diameter
of a lens has to be larger than (focal length)/(smallest f-number).
Which is correct. But I attributed this to the light losses due to
reflection and absorption, and that was wrong. Many thanks to
Tim Lipetz and Per Danielsson who pointed this out.

In fact the f-number is not (focal length)/(aperture diameter)
but the quotient of the focal length and the diameter of the
entrance pupil (EP). The EP is the *image* of the aperture stop
that you see when you look at the front element (and can be much
larger than the aperture itself). It should ideally appear as
a circle of constant diameter, no matter from which direction
(within the lens's angle of view) you look at it. Otherwise
there will be (mechanical) vignetting (light fall-off at the
corners).

Therefore wide-angles need large front elements (as I
mentioned before): You can look at them sideways, and the
aperture still appears to have (about) the same size as when
seen from the front. For long telephotos with a sufficiently
small angle of view, however, the front element need not be
*much* larger than the EP.

The T-numbers are the f-numbers (as defined above) corrected
by the transmission losses; exposure calculations can be
based on T-numbers, but still the influence of focusing has
to be taken into account. It becomes significant (> 1/3
f-stop) when the subject distance is closer than ~9 focal
lengths.

BTW, it could be interesting to know the actual T-numbers for
35mm lenses; a multi-element zoom lens might well be more
than 1/3 of a stop slower than a prime lens of same f.l..

[This is still simplified a bit; corrections/additions are welcome.]

P.S.: Please check the FAQ; my impression is that the information
      concerning f-numbers doesn't get this T/f business right.
--
Detlef Lannert      DC3EK      E-Mail: tsos@rz.uni-duesseldorf.de
"No news is good news - not at all if the news system is broken."
Newsgroups: rec.photo
From: acs@csri.toronto.edu (Alvin Chia-Hua Shih)
Subject: Re: Morris Slaves and Nicads
Date: 16 Sep 92 01:02:31 GMT

In <1992Sep15.153016.7399@cis.ohio-state.edu> ray@anaconda.cis.ohio-state.edu (william c ray) writes:

>If you didn't hear it try to charge, and just sort of "never make it"
>for lack of a better description, then something else was wrong, and
>you shouldn't give up on the NiCads. 

This describes the situation with the Morris exactly.  Where do I go
from here?

Thanks.

ACS
-- 
 ___ ___ ___ ______________________________________________________________
|   |   | __|      Democracy is not a way of getting better solutions.     |
| - | --|__ |           It's just a way to spread the blame.               |
|_|_|___|___|______________________________________________________________|
Alvin_C._Shih____________________acs@csri.utoronto.ca______________________|
From: jspirer@rain.next.com (Jeff Spirer)
Newsgroups: rec.photo
Subject: Photographing Art
Keywords: Art
Date: 8 Sep 92 20:59:02 GMT

I have been asked by a starving artist (friend of a friend) to do slides  
for his portfolio.  I have never done this before and need some  
information on lighting.  The work is paintings with acrylic and some sort  
of gloss finish.  In addition there is some three dimensional texturing on  
some of the paintings.  

Any information/assistance is appreciated.  Email is fine.

Jeff

jspirer@next.com
From: serge@mais.hydro.qc.ca (Serge Oligny)
Newsgroups: rec.photo
Subject: Canon NEW EOS-5 (yes! EOS-5)...
Keywords: Canon SLR caemra AF
Date: 10 Sep 92 16:45:35 GMT
Organization: Hydro-Quebec (DSB)


Hi all netters !!

I just saw a small article in the daily paper a few minutes ago... There was
a picture of an SLR Canon camera identified as EOS-5... looks a lot like Nikon
F4 with the "large" battery pack except the prism housing was flatter than
Nikon's (much like the ELAN in fact).  

The article stated that this new Canon camera was able to auto-focus anywhere
in the viewfinder.  The exact position chosen by the camera to autofocus was
determine by the EYE DIRECTION of the photographer looking in the finder!!
They state that an infrared beam inside the finder is aimed at the eye and the
location of the cornea (the darker center of the eye) is detected, direction
of sight is figured based on that information...

This little marvle is proposed for a price a dash under the $900 (US) !!!

Hmmmmm... with the intro. of Minolta 9xi, Nikon N90 and now this one from
Canon, we are facing a new generation of AF-SLR...

Serge Oligny
(Montreal, QC)
----------------------


--
______________________________________________________________________________
                                      This is a personal opinion that have
serge @mais.hydro.qc.ca               nothing to do with my employer.
______________________________________________________________________________
Newsgroups: rec.photo
From: tjk@ee.uwm.edu (Thomas Krueger)
Subject: Minolta Rangefinder Info Needed
Organization: University of Wisconsin, Milwaukee
Distribution: na
Date: Tue, 8 Sep 1992 18:33:53 GMT

I bought a Minolta Hi-Matic 7 at a flea market recently, for $15. It
appears to be functional, but I have a few questions:

When you line up the red "A"s on the aperture and shutter speed settings,
does that mean it's fully automatic? 

What kind of battery does this camera use? An EPX-625 goes in, but what does
the manufacturer say?

Do you want to Xerox your manual for me?

Please reply via mail.

							- Tom
--

Thomas Krueger                       UW-Milwaukee Engineering Electronics Shop
tjk@csd4.csd.uwm.edu                                         +1 (414) 229-5172
    Moderator: rec.audio.high-end, Info-Fortune, and Mystery mailing lists
Newsgroups: rec.photo,rec.backcountry
From: eugene@wilbur.nas.nasa.gov (Eugene N. Miya)
Subject: Re: What tripod do you use when backpacking?
Organization: NAS, NASA Ames Research Center, Moffett Field, CA
Date: Thu, 10 Sep 92 17:11:19 GMT

While owning several tripods, and a monopod (more for video experiments),
a set of skipoles which can double as a mono pod, the discussion has left out
only one thing: C clamps with camera adaptors.  Light weight, simple to use.
Not perfect, just another toy, but some times handy (I rarely use mine).

--eugene miya, NASA Ames Research Center, eugene@orville.nas.nasa.gov
  Acting Associate Editor, Software and Publication Reviews
  Scientific Programming
  {uunet,mailrus,other gateways}!ames!eugene
Ref: Mathematics and Plausible Reasoning, vol. 1, G. Polya
Newsgroups: rec.photo
From: feldman@hal9k.cxo.dec.com (james feldman)
Subject: Re: 4x5 T-Max: your experiences
Reply-To: feldman@hal9k.cxo.dec.com (james feldman)
Organization: Digital Equipment Corporation
Date: Wed, 9 Sep 1992 20:46:15 GMT

In article <1992Sep9.165049.15014@col.hp.com>, sparks@col.hp.com (John Sparks) writes:
|>I don't really think this is true.  The point where they would cross (if
|>they cross) is so far out that it's not really a usable exposure (hours).
|>At 100 sec (the longest time listed by Kodak), TMY is still 1 1/2 stops
|>faster than TMX.  TMY has two emulsions, one T-grain and one conventional
|>grain (they may only be a single emulsion with both types of grains).  I
|>would guess that the conventional grains whimp out with long exposures,
|>so the T-grains eventually become the only effective emulsion if the
|>exposure is long enough.  This will probably asymptotically approach the
|>TMX curve with really long exposures (hours) so they end up being the
|>same speed.  Either film is much faster than conventional films with
|>really long exposures however.
All I can tell you is that during evening and night exposures (5-10 minutes)
using BW-2, TMX won out in holding the low zone detail, much better than TMY
did.  I shot both back to back using an rb67.  The TMY shadows were empty and
the transition was not pretty.  Like I said, this was just based on my
experiences.

|>The real reason for TMAX RS developer is to prevent dichroich (sp?) fog.
|>This is a staining of the negative and occurs sometimes (depending on
|>processing conditions and water supply) with sheet film and normal TMAX
|>developer.  You may never have a problem with it under your conditions
|>or you might without warning (do you really want to risk ruining your
|>negatives?).  Kodak recommends TMAX RS developer for sheet film even if
|>the developer is used one-shot.
Thats very intersting, I'd not heard the fog problem.  This implies a different
emulsion for the sheet films than the roll (which Kodak never mentions in their
data sheets).  To be quite honest, I've quit using TMAX developer for sheet
films, and use it rarely in roll film anymore.  It's a good thing it has
excellant keeping properties as a concentrate.

jimf

Xref: sparky rec.photo:15898 rec.backcountry:6981
From: robert@sys.sweden.dg.com (Robert Claeson)
Newsgroups: rec.photo,rec.backcountry
Subject: Re: What tripod do you use when backpacking?
Date: 9 Sep 92 14:11:09 GMT
Organization: Data General AB, Akalla, Sweden

In article <ptse.715999405@bcars65b>, ptse@bcars65b.bnr.ca (Paul Tse) writes:

> I use a Manfrotto tripod which is kind of heavy and therefore
> often left at home.  However, the Benbo tripod, with its odd
> single-lever design, looks like it was made for use out in the
> woods and the like.  The little clamp-on units look like they
> could be useful too if there are plenty of branches around to 
> clamp it on.

Yes, the Benbo tripods are very rugged and works great, but they are
somewhat heavy, too. The Trekker is a smaller tripod, but I wouldn't
say it can hold a 400mm lens steady. It has problems with my 80-200/2.8
zoom. I'd use the Benbo Mk. 1 tripod instead.

-- 
------------------------------ END OF MESSAGE ------------------------------
Robert Claeson                Internet: robert@sys.sweden.dg.com
Data General AB                         robert@sys.dg.se
Box 28                             CEO: robert@sys.sweden.dg.com:dg-smtp
S-164 93 KISTA                     Tel: +46 (0)8-92 55 00
Sweden                             Fax: +46 (0)8-751 36 22
Xref: sparky rec.photo:15954 alt.cd-rom:3060 gnu.misc.discuss:2995 misc.int-property:954
From: perl@dwrsun4.UUCP (Robert Perlberg)
Newsgroups: rec.photo,alt.cd-rom,gnu.misc.discuss,misc.int-property
Subject: Re: Time to boycott Photo CD
Date: 10 Sep 92 21:11:41 GMT
Organization: Dean Witter Reynolds Inc., New York

In article <1992Sep3.191310.17132@eskimo.celestial.com>, kurt@eskimo.celestial.com (Kurt Cockrum) writes:
> I hope all of the companies out there that wheel and deal in intellectual
> property litigation (as opposed to making innovations) hack and stab each
> other to death, as they roll tumbling over Reichenbach Falls.  And the more
> booby traps they encounter along the way, the better.

A nice sentiment, but it's not gonna happen.  As long as these
companies keep producing products people want, they will stay in
business.  Most Americans don't understand the free enterprise system
and just take whatever Soylent Green big industry makes available to
them.

This all reminded me of another example of this sort of thing I thought
some of you might be interested in reading about.  We have a number of
DEC and Emulex LAT terminal servers which we needed to use with our
Suns, so we got a software package that allows the Sun to accept LAT
connections.  For the uninitiated, LAT is a terminal server protocol
developed by DEC and the Emulex terminal server emulates the DEC
terminal server.  We had some trouble getting the software to work with
the Emulex servers, but not with the DEC servers.  We called the
software vendor for help and they explained the situation like this:
DEC owns the LAT protocol so if you want to make anything that uses it
you have to license the protocol from DEC.  Along with this licensing
comes the requirement that you implement the protocol exactly as
specified in the DEC protocol specs.  The problem is that DEC's own
systems do not conform to the specs.  The result is that no products
based strictly on the specs will work properly unless they are used in
conjunction with DEC equipment.  Here's a case where proprietary
licensing not only does not encourage quality, it actively prevents
quality!

Robert Perlberg
Dean Witter Reynolds Inc., New York
{murphy | philabs}!dwrsun4!perl
	-- "I am not a language ... I am a free man!"
Newsgroups: rec.photo
From: hchong@netcom.com (Hoi Chong)
Subject: Re: High speed useful ? (was Re: Nikon N90 technobabble)
Date: Tue, 08 Sep 92 00:35:20 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 

From article <272@metran.UUCP>, by jay@metran.UUCP (Jay Ts):
> luong@naxos.inria.fr (Quang-Tuan Luong) writes:
> : In article <PHR.92Sep4102515@soda.berkeley.edu>, phr@soda.berkeley.edu (Paul Rubin) writes:
> : 
> : |> They should also add TTL flash metering and a 1/8000 shutter (the more
> : |> recent FM2's already use the same shutter as the N8008) and call it
> : |> the FM3.
> : 
> : I don't understand the utility of high speed shutters. On my 8008, I think
> : I have never shot beyond 1/1000s, and I cannot imagine any real situation 
> : where 1/8000s would be useful.
> 
> Suppose you are using T-max P3200 at EI 25000 on the beach on a sunny day.
> (That would be 1/25000 sec at f/22 -- you would need some neutral density
> filters, too!) Or maybe Scotchchrome 1000 pushed 3 stops.  That would be
> 1/8000 at f/22, ok?
> 
> There also might be some really fast action you would like to catch.
> Hummingbirds, or something...

I agree with the previous paragraph, but the latter might be a bit
"not that true".  I believe at 1/8000th, the camera does not actually
capture the whole frame within 1/8000th of a second.  Instead, it might
say take 1/2000th of a second to take the frame, while taking portions
of the frame at a time. 

Let say the shutter moves downward.  At 1/8000th second, the upper leaf
actually starts moving downward before the lower leaf hit the bottom.
This will allow exposure done to portions of the frame at a time 
("analogly", of course).  Therefore, catching fast action might not
be completely true (or capable) at 1/8000th.

Can anyone say what is the highest speed w/o the shutter doing the
"portion-at-a-time" thing?  (specifically on F4s) 




Organization: Masters student, Industrial Administration, Carnegie Mellon, Pittsburgh, PA
Newsgroups: rec.photo
Date: Thu, 10 Sep 1992 10:11:52 -0400 
From: Predeep Menon <pm3l+@andrew.cmu.edu>
Subject: Lease a slide projector 

I need a slide projector for a slide show, during one of the forthcoming
weekends. Am willing to pay reasonable rental rates. If you have a slide
projector and are willing to lend it out (I assure you that proper care
will be taken), or know of someone/someplace from whom/where I can get
one, please e-mail me. Thank You.

Xref: sparky rec.photo:15729 misc.forsale:25653
From: scaruffi@flash.ATC.Olivetti.Com (Piero Scaruffi)
Newsgroups: rec.photo,misc.forsale
Subject: BRAND NEW CAMCODER FOR SALE
Date: 8 Sep 92 17:52:16 GMT
Followup-To: rec.photo
Distribution: ba
Organization: Olivetti ATC; Cupertino CA, USA


I am posting this for a friend.

BRAND NEW JVC VHS-COMPACT camcoder FOR SALE.

It's a new JVC GRAX2, a compact VHS-C  purchased one month ago in New York
(receipt available). Used only once.

VHS tape adapter
battery
battery charger
cable for AC power
cable for TV connection
additional battery, double capacity

Extended warranty.

Paid $910

Reason for selling: moving back to Europe, where the standard is not compatible.

Best offer.

Contact: piero at x3391 

Newsgroups: rec.photo
From: braun@dri.com (Kral)
Subject: Re: Minolta diff 5000,5000i,5xi (et al)
Organization: Digital Research Inc
Date: Tue, 8 Sep 92 15:31:01 GMT

(Normally, I would Reply instead of Followup, but I think my ending comments
are appropriate to the group.

In article <2307@devnull.mpd.tandem.com> bruceb@mpd.tandem.com (Bruce Burden) writes:

	... a good summary of the differences between the Minolta n0000,
	n000i, and nxi cameras  (Thanx!).  And then says:


>	Depending on the budget, a new 5xi might be the route. Or,
>    perhaps a used 7000i. I am not sure that I would bother with a
>    5000i/3000i, and definitely nothing older. The manual capability
>    of the 5xi/3xi make them much more competetive with the Canon
>    Rebel series, and they are about the same as a 7000i. Both systems
>    would handle what you are looking for, I would think. How much
>    does AZ mean to you?

I ended up springing for for the 5xi with the 25-105xi lens.  Before purchasing
the camera, I would have said that I didn't care much about AZ.  However, now
that I've used it, it comes in pretty handy.  The processor does a pretty good
job of initial framing for about 80% of my shots.  The override features
(something Bruce mentioned as a Good Thing(tm)) are easy to use (at least as
far as I have used them).  The camera, lens, case (room for camera and spare
lens, plus pockets for film, etc), all cost around $900 after tax (7.25 or so
around here).

Thanx for the info, Bruce.

-- 
kral   408/645-2031                                                braun@dri.com
Network Scapegoat in Training                                      Novell/DSG
That's the whole problem with science.  You've got a bunch of empiricists 
trying to describe things of unimaginable wonder." - Calvin
Newsgroups: rec.photo
From: DH02000 <DH02@polytec1.polymtl.ca>
Subject: RE: Nikkor 75-300/4-5.6 AF : your experiences needed
Organization: Ecole Polytechnique de Montreal
Date: Thu, 10 Sep 1992 16:15:37 GMT

In article <1992Sep10.112543.5664@cs.joensuu.fi> jpehko@cs.joensuu.fi (Juha Pehkonen) writes:
>Hi all,
>
> I'm thinking of purchasing the zoom mentioned in the topic and would like
>to hear your opinions about it or any other similar zoom. What does 5.6
>mean in practice? Do I have to use tripod even in daylight? Anything
>else I should know before buying it?
>
>Thanks in advance,
>
>Juha Pehkonen
>jpehko@cs.joensuu.fi
>University of Joensuu, Finland
>
>.
I own the lens in question and find it great!!  Yeah, the f:5.6
(at the 300 mm end) is a slight problem, but for the money (I paid
about US$450 for mine in June - mail ordered from B+H), you can't
do better for a AF NIKKOR:-(

SIGMA/TAMRON have AF lenses in the same range at half the price, but
I can't comment on them because I haven't seen them.

I've used the lens extensively outdoors (nature and street candids),
however restricting myself to 200 or 400 ISO film and sunny weather.
I think it is a well balanced and a solid lens (I'd owned a
(100-300/5.6 Hoya for my OM-10 before!) and have enjoyed using it.
Slightly on the heavier side (minimal plastics) and has a tripod collar.
Slides were *crisp* and I couldn't tell any fall-off at the edges!I
like the 2-touch operation (separate rings for focussing and zooming).

 -Tamal Ghosh
  Departement de genie chimique
  Ecole Polytechnique de Montreal
Newsgroups: rec.photo
From: acs@csri.toronto.edu (Alvin Chia-Hua Shih)
Subject: Re: Info. about the Sigma 28-70/f 3.5-4.5
Date: 9 Sep 92 20:04:37 GMT

In <1992Sep5.013033.1941@walter.bellcore.com> jchen@flash.bellcore.com (Jason Chen) writes:

>Upon writing this, one question stikes me: why there is no third-pary
>camera manufacturer to build Nikon/Canon compatible cameras? For budget-
>oriented people like myself, saving money on camera body would make more
>sense than saving money on lenses.

These manufacturers are pretty secretive about the workings of the
electronics.  For instance, I've never heard of a dedicated 3rd-party
flash that works with the AF Nikons or Canons in the more sophisticated
modes.  Sometimes, the AF of 3rd party lenses doesn't work quite right
either.

I read that Sigma is hoping to release an AF camera and thought about
going with the Canon EF mount, but decided to design their own mount.
Hmmm...

ACS
-- 
 ___ ___ ___ ______________________________________________________________
|   |   | __|      Democracy is not a way of getting better solutions.     |
| - | --|__ |           It's just a way to spread the blame.               |
|_|_|___|___|______________________________________________________________|
Alvin_C._Shih____________________acs@csri.utoronto.ca______________________|