Re: [Cameramakers] MIDO system

2003-03-16 Thread Samuel Tang
Hi Alberto,

Good to hear that you also like the Mido original! I have found a webpage which
discusses the pros and cons of various 4"X5" holders:

http://www.butzi.net/reviews/filmholders.htm

All the best,

Sam.


Alberto Rodriguez wrote:

> Sam, you are not the only person on this planet using the Mido System.  I bought
> the Mido system since its introduction on the market several years ago.  Then I
> bought the MIDO II film holders, this model works as a regular film holder in the
> way that you introduce the film in the slots.
>
> I  use the MIDO system and it is very useful.  You can carry 50 sheets of 4x5 film
> in a small bag and have plenty of film for the day.  The Mido system is very light
> weight and compact.  You can get some of these MIDO film holder and the holder in
> some of the large format sites in the web.  I bought some more film holders at The
> F-Stop site, www/thefstop.com/
>
> Have a nice day,
>
> Alberto

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Re: [Cameramakers] McKenzie-Wishart

2003-03-15 Thread Samuel Tang
Hi Marty,

The McKenzie-Wishart system was an alternative to double darkslides in
the dry plate era. Each dry plate was put into a light-tight envelope,
and instead of the darkslide, a special holder was used. The envelope is
inserted into the holder, where it is opened and the plate put into
position ready for exposure, then the envelope can be closed up and
withdrawn.

The original Mido system was pretty much the same, of course the
envelopes were made for sheet films and were double-sided.

Best,

Sam.


[EMAIL PROTECTED] wrote:

> What is it?
>
> Marty

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Re: [Cameramakers] Polaroid 545

2003-03-15 Thread Samuel Tang
Hi Larry,

I often wonder if I am the only person left on this planet still using the
original Mido system, which is best described as a modern version of the
McKenzie-Wishart; even with a small camera bag I can carry my MPP, lenses and
enough loaded film for 12 pictures with ease.

Best,

Sam.

Larry & Pat Nieland wrote:

> I have not shot 4X5 for a while but when I was I always wished I had
> a 545 holder to go with the Fuji readyload films. - Carrying around about a
> dozen film holders and loading and unloading them is NOT my idea of fun!
> Properly utilized, the 545/readyload system makes for  lite weight and time
> savings!
> Regards,
>
> LARRY

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Re: [Cameramakers] 4 x 5 View Camera

2003-03-10 Thread Samuel Tang
Hi Jim,

I would also be very interested in having a copy of this as well; thank you so
much!

Best,

Sam.


Jim wrote:

> I have a PDF file covering the making of a 4 x 5 view camera from Popular
> Mechanics Magazine for October 1942. The file is 1,049 Kb in size. If anyone
> wishes this file please let me know.
> Jim Ketcheson
> Belleville, Canada

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Re: [Cameramakers] Sam's Off-lable use of scouring powder

2003-03-03 Thread Samuel Tang
Hi Murray,

Suddenly I remembered something; the last round of grit refinement takes 10
seconds rather than 30 seconds, my mistake. Sorry.

Sam.

Samuel Tang wrote:

> Hi Murray,
>
> This method is not my invention, but that of a fellow member of the
> Photographic Collectors Club of Great Britain. There is no need to go for
> the good name-brand scouring powder, cheaper generic brands actually work
> somewhat faster as they appear to contain sharper grits.
>
> Being of British, and in particular of the Leicestershire persuation and now
> Australian to boot, I do like the art of improvisation, especially if it
> works!
>
> Good luck, and tell us how it goes.
>
> Best,
>
> Sam.
>
> Uptown Gallery wrote:
>
> > Thanks!
> >
> > I like that, particularly because it's an off-label use and you made your
> > own abrasive.
> >
> > Now we need someone with a fuel cell to produce their own water!
> >
> > Murray
>
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Re: [Cameramakers] Plans for a studio stand?

2003-03-03 Thread Samuel Tang
Hi Matt,

You might want to consider building a portable stand based on the
Gandolfi design, which is basically a telescopic wooden vertical, with
three pivoted legs. The need for metal work is minimal, and when you
have finished you can fold it up and put it away.

Best,

Sam.

Matt McKee wrote:

> I am looking for ways to build an inexpensive camera stand for studio
> use. I remember seeing a set of plans years ago in a diy book for a
> monopod on wheels but can't find it again and can't remember if it
> was sturdy enough for a 4x5 monorail.
>
> I am working in a very small space with a low ceiling so most
> commercial camera stands are out. Also, they are more than I want to
> spend.
>
> Anyone have any suggestions for a 6 foot camera stand?
>
> Thanks,
>
> Matt

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Re: [Cameramakers] Sam's Off-lable use of scouring powder

2003-03-03 Thread Samuel Tang
Hi Murray,

This method is not my invention, but that of a fellow member of the
Photographic Collectors Club of Great Britain. There is no need to go for
the good name-brand scouring powder, cheaper generic brands actually work
somewhat faster as they appear to contain sharper grits.

Being of British, and in particular of the Leicestershire persuation and now
Australian to boot, I do like the art of improvisation, especially if it
works!

Good luck, and tell us how it goes.

Best,

Sam.


Uptown Gallery wrote:

> Thanks!
>
> I like that, particularly because it's an off-label use and you made your
> own abrasive.
>
> Now we need someone with a fuel cell to produce their own water!
>
> Murray

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Re: [Cameramakers] ground glass grinding

2003-03-02 Thread Samuel Tang
Hi Murray,

The method I use for making ground glass is to use scouring powder, refined to
discard the soap content and grit of incorrect size.

You need two large glass jars, lots of water and scouring powder. First put a
tablespoon of scouring powder in one jar, top up with water, stir vigorously,
leave it to settle, then decant the water off. Repeat until the water is clear.
Fill and stir again, and quickly decant into the other jar within 30 seconds;
the particles which have settled during this time would be too large and can be
discarded. Wait for it to settle again, decant the water off, leaving a slurry
below; this is the grinding paste I use.

Take two pieces of glass cut to the correct size, have one sitting on a stack
of newspaper, spoon out a little of the grinding paste to its middle, cover
with the other piece, and grind away. When you feel the resistance dropping you
have worn out the grinding paste so it has to be replaced, and progress can be
monitored easily, just rinse them in water.

This method makes very bright and finely matted ground glass, ink sticks to the
matt surface very well indeed.

Hope this is of help; I would like to see how this method works for others.

Best,

Sam.


Uptown Gallery wrote:

> I save all the digests, but that makes it harder to retrieve info too -
> takes a long time to search -
>
> If I use Silicon Carbide to make ground glass, what grade or grades should I
> use?
>
> Thanks
>
> Murray

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Re: [Cameramakers] Re: Anti-Newton

2003-02-16 Thread Samuel Tang
Hi Gui,

Not being in the US I am not familiar with the Elwood, but I use a couple of
large format enlargers: a Wasp IIIA (1949 model) and a Durst Laborator 35,
and found the original carriers unacceptable.

To replace them I constructed carriers or inserts, consisting of a support
plate with the aperture for the negative area, with a sheet of Contact®
paper stuck on top, cut out to position the negative, all topped with a thin
sheet of glass with a tape hinge. This keeps the negative flat, as the
negative tends to bow towards the emulsion side as it gets warm this is
countered by the weight of the glass. I have never suffered from Newton's
Rings with this configuration, but it is indeed possible to reduce the
likelihood by spraying the glass with a weak solution of gum arabic (as used
in gum bichromate printing) through a fine atomiser; if you can see a slight
mottled pattern when dry then it is OK.

Newton's Rings is an effect when light is bouncing off two surfaces in
proximity, but not parallel, again and again, and if you reduce the
reflection of one or both then you can elimate it. An idea is to use coated
glass, and the gum arabic spray is a way of making the glass to perform as
if it is coated.

Best,

Sam.


Guilherme Maranhao wrote:

> No, I don't have AN glass.
> And it is too expensive for me right now.
> I was thinking of buying a small piece of non-glare picture/painting
> framing glass and using it instead.
> My Elwood enlarger came with one piece of glass only on the carrier.

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Re: [Cameramakers] lens design reading?

2003-02-01 Thread Samuel Tang
Hi Philip,

I haven't read that article, but from your description it sure looks
like someone was trying to do something as suggested in LP Clerc's
Photography: Theory and Practice, Book I Fundamentals: Light, Image,
Optics, as revised by LA Mannheim and edited by DA Spencer (Focal
Press1970).

Some earlier lens configurations were discussed, and in section 143 the
Puyo & Pulligny Symmetrical Anachromatic lens of 1903 was discussed, and
was described as consisting of "two identical convergent menisci placed
one on either side of the stop, with their convex surfaces outwards and
separated by at least one-sixth of their common focal length. When the
necessary correction is made for focus, very agreeable portraits can be
made, covering a field of 30°. This is thus a way to achieve a soft
focus lens of deliberately imperfect definition."

With this information it would be easy to improvise something out of a
pair of close-up supplementaries, but with panchomatic material the
soft-focus effect would of course be greatly exaggerated.

Best,

Sam.

Philip willarney wrote:

> I read that article -- in brief, the author took a couple of
> off-the-shelf screw-on closeup lense, put
> them in a tube (back to back, "front" of each lens facing out of the
> tube), and experimented with
> different spacing, and adding pieces of card with holes in them to act
> as waterhouse stops.  Wound up
> with a couple of different usable camera lenses, mostly of the "soft
> focus" flavor.
>
> -- pw
>
> --- [EMAIL PROTECTED] wrote:
> > There was an article in ViewCamera Magazine,
> > July/August issue, on making
> > your own lenses. Would that help? John

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Re: [Cameramakers] Pathfinder

2003-01-30 Thread Samuel Tang
Hi Antoine,

You can have a look at this:

http://www.littman45single.com/

Best,

Sam.


[EMAIL PROTECTED] wrote:

> Hi
> I was wondering if any body has had any experience modifying a
> polaroid 110b or 110a for 4x5 use?
> I am in the process and just looking for inspiration.
>
> Thanks
> Antoine

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