KDS-POTO2

KDS-POTO2 is a camera designed and produced by myself – with lens from waiwai / shutter plate from Holga.
The overall production time (with drafting and designing) took around 2 months. Here’s how it looks like.
and here’s its features list:
1. swappable lens – waiwai 17mm lens / pinhole lens
2. swappable back – 135 / 120 back
3. bulb / normal shutter mode
4. single frame counter

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It is a record of how I made it.
first of all, I keep drawing lots of drafts whether or not i can actually make it
just do the design and technical problem will be solved


1. DESIGN
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initial design 1 – as I’ve did KDS-POTO1 before, I sort of understand the basic design of it,
but when i am designing KDS-POTO2, i have a sense of… wait, i can do a changable back…
so on this draft I started to draw a front shell with knobs + adaptor and back is the core but separtate thing

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initial design 2 – more refined drawings

135back
135 back’s design

120back
120’s back design

antiRollBackGear
anti roll back gearwork – stop film from loosing or rolling back

lensAdaptor
lens adaptor – so that pinhole lens / waiwai lens can be utilized

shellLock
shell locker – to hold the back in place after loading film


2.Testing
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as I’ve stick up KDS-POTO1 before, for the shutter plate, film distance from the lens are understood alread – so no more testing of focusing problem by semi-transparaent paper…

instead I’ve did some testing on gearwork with spring

and put it practically,

3.AI file design
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this is a long long part to do up the design in an AI file
have to consider the thickness, have to be very precise on any part
and as I am using a “sanded” acrylic board… orientation of the design matters !
(else some shiny faces will have to show up on the outer shell – which looks really bad if so !!!)

here’s the laser-cut acrylic board with my AI file

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4.Sticking it up !
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to stick up acrylic board, Chloroform is to be used

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and it will crystallize

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many other tools

a. the film frame counter module
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the basic framework which film can pass through

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with the 8-legged gear – it rotate once = 8 holes passes = 1 frame of film passes !
thx my friend “iamwen” to enlighten me on this gear XD

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with the top part stuck (there’s a triangle mark there for you to see if 1 rotation has been made)

b. the anti-roll-back gearwork
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spring with the leg

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the gearwork take-up spool

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when they combined – (just work as the video above)

c. the shell
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shell with lens adaptor

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behind it there’s a holga shutter plate

d. waiwai lens
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remove the lens module from waiwai – including the lens holder

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cut up the edges

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put it with the adpative rings – with the hood stuck to it, it will be done

e. pinhole “lens”
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get a piece of plastic

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sand it till the center part is very thin

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pin a hole on it

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stick it to the lens ~ done !!!

5.Putting everything together
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put a film roll for testing


here’s KDS-POTO2 with waiwai lens :D

6.Sample Photos
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by KDS-POTO2 with pin-hole “lens” :
pinhole at Lo Fu Kee

by KDS-PTO2 with 17mm waiwai lens:誠
coconut Tart

some double-exposures:smoking area X green firework in LeiTung
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