Re: [Cameramakers] Making a Panoramic Camera
David, I want to make a round shot camera on 120 films. I got a 28mm lens 42mm mount that should be ok to start with. I already know how to make the film slide synchronised but I'm still stuck on the choice of the motor. ( yes I want to use a motor ! ) First I wanted to use a step motor + gears but I'm afraid about the lines it could make on the film. The second choice is a geared DC motor but how will I have an accurate positioning ? I thought about coupling a 360° pot or using a perforated disk with sensors kinda like in a mouse. I'll drive the motor with a microprocessor, PIC or basic stamp. I prefer the step motor because it's easier for me to drive it. For now I'm just at the draft drawing point, trying to put all my ideas on paper but I hope I'll soon have a prototype. I already made a few draws. The first ones where what I wanted to have but now I'm drawing something that looks like what I want but easier to build with the tools I have and the materials I can afford. I try to make it compact, easy to build, easy to use and not very expensive. That a tricky exercise ! I'll also try to include the possibility to switch from 28 mm to 50 mm if I have time to look for a solution of easy switching gears. Regards, Cedric. On Mon, 23 Sep 2002 19:39:21 -0700 (PDT), david hajjab wrote: Cedric, What type of panoramic camera do you want to make? David __ Do you Yahoo!? New DSL Internet Access from SBC Yahoo! http://sbc.yahoo.com ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers -- Cedric Malitte, [EMAIL PROTECTED] on 24/09/2002 ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
Re: [Cameramakers] Making a Panoramic Camera
If you drive stepping motors with a pair of 90 degrees out of phase sine waves (sine plus cosine) you will often find the motion to be much smoother (I assume you would have 2 phase motors). I suggest selecting motors with finer steps, 200 per revolution or more. I have seen 400 to 500 step, two phase motors in applications like plotters but you will need some luck or patience to find these; however, 200 ought to be good enough. Bob At 11:57 24.09.02 +0200, you wrote: David, I want to make a round shot camera on 120 films. I got a 28mm lens 42mm mount that should be ok to start with. I already know how to make the film slide synchronised but I'm still stuck on the choice of the motor. ( yes I want to use a motor ! ) First I wanted to use a step motor + gears but I'm afraid about the lines it could make on the film. The second choice is a geared DC motor but how will I have an accurate positioning ? I thought about coupling a 360° pot or using a perforated disk with sensors kinda like in a mouse. I'll drive the motor with a microprocessor, PIC or basic stamp. I prefer the step motor because it's easier for me to drive it. For now I'm just at the draft drawing point, trying to put all my ideas on paper but I hope I'll soon have a prototype. I already made a few draws. The first ones where what I wanted to have but now I'm drawing something that looks like what I want but easier to build with the tools I have and the materials I can afford. I try to make it compact, easy to build, easy to use and not very expensive. That a tricky exercise ! I'll also try to include the possibility to switch from 28 mm to 50 mm if I have time to look for a solution of easy switching gears. Regards, Cedric. On Mon, 23 Sep 2002 19:39:21 -0700 (PDT), david hajjab wrote: Cedric, What type of panoramic camera do you want to make? David __ Do you Yahoo!? New DSL Internet Access from SBC Yahoo! http://sbc.yahoo.com ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers -- Cedric Malitte, [EMAIL PROTECTED] on 24/09/2002 ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
[Cameramakers] Journey to the dark slide
Hello out there...
I am in the process of trying to build a light weight 20x24 camera
along with 12 single film carriers.. The initial stage is to build the
film carriers so that the ground glass can be positioned accurately.. I have
a idea for a New design for the film carrier which I will share with
everyone in the near future . It is amazingly simple {if it works}, will
be cheap to build and will have several serious advantages over a
conventional film carriers. I am still trying to figure things out at this
point.. There seems to be nothing new under the sun so maybe this will
end up not being a fresh idea after all...
I intend to make the film carriers and camera out of
Alloonneeyyuumm
My biggest obstacle at this moment is that I am hung up on the
design of the light trap for the dark slideAt $10 per sheet of film I
would like to come up with a fool proof design..
Are there any publications on making film carriers?
Presently I am also trying to decide on the material used for the dark
slide( I was thinking of using either black Formica or black rigid
Sintra which is a expanded PVC product.. see below ) Does any one have any
other suggestions as far as dark slide material or experience with this
Sintra? . I believe it is also manufactured under the name Komatex, and
Celtec... This material is very light and seems to be quite durable..
Sintra : ( written by a distributor)
Sintra is a closed-cell, expanded plastic that has high strength-to-weight
ratio for superior workability. The material is so easy to work with, you
can build your displays, exhibits, and signage in half the time. That means
half the labor and fabrication costs.
Sintra material is made to stay flat. But it has the formability to take on
any design. And its edges cut clean with uniform color throughout. No
fraying or unattractive inner core. Plus sintra is tough enough to be used
over and over again. So you can use your display, exhibit or sign year after
year.
This material can be fabricated using conventional wood tools. Saw it. Drill
it. Glue it. Die cut it. Nail it. Silk screen it. Truly a versatile material
for state-of-the-art displays, exhibits and signs. Plus it;s a UL-recognized
component with a 94VO fire rating for low flame spread.
Available in White, Black, and colors and comes in very thin 1/16 inch to
over 3/4 inch in thick...
Regards,
John Cremati
___
Cameramakers mailing list
[EMAIL PROTECTED]
http://rmp.opusis.com/mailman/listinfo/cameramakers
[Cameramakers] Panor
Alan, wouldn't you need some sort of device to keep the speed consistant? David You need very little effort to move a balanced pivoting lens. A light spring or elastic with an adjustable tensioner will work except for slow speeds. For slower speeds manual with a lever works better than you might think. AZ Maker of Lookaround panoramic camera. http://www.panoramacamera.us or keyword.com lookaround __ Do you Yahoo!? New DSL Internet Access from SBC Yahoo! http://sbc.yahoo.com ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
[Cameramakers] fluorescent light source for poly papers
Murray, Plain ol' cool white lamps work fine for graded or poly papers. If I were you I'd have a lamp custom made at a sign company - cheap$$! I can give you more details. AZ Maker of Lookaround panoramic camera. http://www.panoramacamera.us or keyword.com lookaround I am interested in more details as I am planning on building an 8X10 enlarger! ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
