Imitation is the greatest form of flattery.  I can only continue to thank
everyone else for their ideas which I keep embellishing.  This one being Dave
Blandston's.
This is the aperture mechanism, best I could mimic, of an old bellows camera.
Only the red ring and parts within are known to be like this shows.   The green
ring behind it is a guess, and not a good one so far because the pivot points
aren't well placed.  However the way in which the pivots slide within the red
ring notches is very close to the real thing.

Bob
--
omniVerse http://users.aol.com/persistenceofv/all.htm

Post a reply to this message

Attachments:
Download 'Iriss.mpg' (89 KB)

Semi-transparent this time.

Post a reply to this message

Attachments:
Download 'Irisx.mpg' (52 KB)

That's outstanding, Bob. I would never have been able to figure that out
just by looking at my wife's camera, and I doubt that she would be too happy
if I took it apart. :) I wasn't even close! The x-ray view made it much
clearer. I'll bet the camera/photography crowd would love to see that
animation! (Mrs. Blandston was certainly quite impressed!)

I am humbled by your ability, as well as by many folks around this
newsgroup.

Also, now's my chance to learn to use Chris Colefax's Clock file. I've been
meaning to get around to that, since all his other include files are so
incredible...

Thanks for posting the code. Before I plagiarize it I'm going to give the
animation one more try on my own, after viewing your animations.

Regards,
Dave

"Bob Hughes" <per### [at] aolcom?subject=PoV-News:> wrote in message
news:39738bfa@news.povray.org...
> Imitation is the greatest form of flattery.  I can only continue to thank
> everyone else for their ideas which I keep embellishing.  This one being
Dave
> Blandston's.
> This is the aperture mechanism, best I could mimic, of an old bellows
camera.
> Only the red ring and parts within are known to be like this shows.   The
green
> ring behind it is a guess, and not a good one so far because the pivot
points
> aren't well placed.  However the way in which the pivots slide within the
red
> ring notches is very close to the real thing.
>
> Bob
> --
> omniVerse http://users.aol.com/persistenceofv/all.htm

Post a reply to this message

they are damn good, so good infact I have just emailed them to my dad - a
serious photography fanatic!

Rick

"Bob Hughes" <per### [at] aolcom?subject=PoV-News:> wrote in message
news:39738bfa@news.povray.org...
> Imitation is the greatest form of flattery.  I can only continue to thank
> everyone else for their ideas which I keep embellishing.  This one being
Dave
> Blandston's.
> This is the aperture mechanism, best I could mimic, of an old bellows
camera.
> Only the red ring and parts within are known to be like this shows.   The
green
> ring behind it is a guess, and not a good one so far because the pivot
points
> aren't well placed.  However the way in which the pivots slide within the
red
> ring notches is very close to the real thing.
>
> Bob
> --
> omniVerse http://users.aol.com/persistenceofv/all.htm
>
>
>
>

Post a reply to this message

what clock file?  i missed something by chris colefax?  is it on his
site?

Dave Blandston wrote:
> 
> That's outstanding, Bob. I would never have been able to figure that out
> just by looking at my wife's camera, and I doubt that she would be too happy
> if I took it apart. :) I wasn't even close! The x-ray view made it much
> clearer. I'll bet the camera/photography crowd would love to see that
> animation! (Mrs. Blandston was certainly quite impressed!)
> 
> I am humbled by your ability, as well as by many folks around this
> newsgroup.
> 
> Also, now's my chance to learn to use Chris Colefax's Clock file. I've been
> meaning to get around to that, since all his other include files are so
> incredible...
> 
> Thanks for posting the code. Before I plagiarize it I'm going to give the
> animation one more try on my own, after viewing your animations.
> 
> Regards,
> Dave
> 
> "Bob Hughes" <per### [at] aolcom?subject=PoV-News:> wrote in message
> news:39738bfa@news.povray.org...
> > Imitation is the greatest form of flattery.  I can only continue to thank
> > everyone else for their ideas which I keep embellishing.  This one being
> Dave
> > Blandston's.
> > This is the aperture mechanism, best I could mimic, of an old bellows
> camera.
> > Only the red ring and parts within are known to be like this shows.   The
> green
> > ring behind it is a guess, and not a good one so far because the pivot
> points
> > aren't well placed.  However the way in which the pivots slide within the
> red
> > ring notches is very close to the real thing.
> >
> > Bob
> > --
> > omniVerse http://users.aol.com/persistenceofv/all.htm

Post a reply to this message

ryan constantine wrote:
> 
> what clock file?  i missed something by chris colefax?  is it on his
> site?

It is called clockmod.inc. You can find an excellent tutorial on its
use at Steve Stricklands web page -

http://www.puzzlecraft.com/cm/ClockMod.html

-- 
Ken Tyler - 1400+ POV-Ray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

Post a reply to this message

"Dave Blandston" <gra### [at] earthlinknet> wrote in message
news:3973dd66$1@news.povray.org...
| That's outstanding, Bob. I would never have been able to figure that out
| just by looking at my wife's camera, and I doubt that she would be too happy
| if I took it apart.

No, not a good idea to disassemble someone else's things.  Unless you're a
professional and a
stranger  :-)
The overlapping plates (still don't know a name for them) was fairly obvious but I had
to take
the lens ring off to actually know how they were moved in the front.  If I were
compelled enough
I might take the whole thing apart to see the back but I'm pretty sure of the anchored
ends
because I already got the correct movement like it is.  Just need to reposition some
some to get
a better pivot point on the back.

| Also, now's my chance to learn to use Chris Colefax's Clock file. I've been
| meaning to get around to that

It's a great thing to simply put in a clock type and go.  You've been missing out.  I
only used
it for this to open and close the iris for loopability.  Wasn't needed.
Good luck on yours, and glad you liked mine.

Bob

Post a reply to this message

"Rick [Kitty5]" <ric### [at] kitty5com> wrote in message news:39741ad6@news.povray.org...
| they are damn good, so good infact I have just emailed them to my dad - a
| serious photography fanatic!

I'll take that as a compliment, certainly so.  Hope he doesn't email me a small book
of things
wrong with it.

Bob

Post a reply to this message

In the first non-transparent animation, the movement seemed strange to
me ... but now, that's clear !
nice animation, really !

Denis.


Bob Hughes wrote:
> 
> Semi-transparent this time.
> 
>                 Name: Irisx.mpg
>    Irisx.mpg    Type: MPEG Video (video/mpeg)
>             Encoding: x-uuencode

Post a reply to this message

"Denis Corbin" <cor### [at] wanadoofr> wrote in message
news:39743B15.C2412DB0@wanadoo.fr...
| In the first non-transparent animation, the movement seemed strange to
| me ... but now, that's clear !
| nice animation, really !

Thanks, good to hear that.  Still looks strange to me.

Bob

Post a reply to this message