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DIY zoom/focus gears


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#1 stewsmith

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Posted 21 October 2010 - 10:45 AM

Fed up with being ripped off for items such as zoom gears, I want to build my own. Has anyone else done this and if so, do you have any info about materials. Any photos of the finished items would be cool. I would also like to know if there were any teething problems.

Stew

Canon 5D MK2 - Sea and Sea housed - 17-40L 100mm - Sigma 15mm FE - twin YS250 pro's and gadgets galore

 

http://www.euphoticzoneimaging.com

 


#2 antacid

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Posted 21 October 2010 - 06:56 PM

Fed up with being ripped off for items such as zoom gears, I want to build my own. Has anyone else done this and if so, do you have any info about materials. Any photos of the finished items would be cool. I would also like to know if there were any teething problems.

Stew



exactly! my friends and i made a couple of zoom sleeves for the 10-17 and 12-24 for use in S&S housings about 3-4 years ago. raw material cost was about $20 and we made 5-6 zoom gears with material left over. i'll go dig up pictures, but essentially the materials are:

1. 3M double sided mounting tape
2. rubber mat (like a car-mat) with grooves to act as "teeth" to engage the zoom gear on the housing

so we just cut strips of the rubber mat with and stuck them on the mounting tape (1 strip with grooves on the lens, and another strip with grooves facing outwards), and wrapped them round the lens we wanted to use to get the right circumference. then we used electrical tape to stick both ends together and that was it!

just slip on the sleeve to use, and take it off after that. they were incredibly lasting and my friends are still using them now.

the key is to find a rubber mat with the right grooves. somehow the one we had was a perfect fit, and the mat was actually bought to line the floor and we just stared at it and said "let's make zoom gears!"

teething problems:
1. the mounting tape we used was white, so it shows up in the reflection of the dome port when the sun is in the frame. so we used black markers to colour them black.

other than that it's been smooth sailing!
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#3 btroxell

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Posted 22 October 2010 - 06:00 AM

Take a look at :
http://wetpixel.com/...showtopic=31326
and
http://wetpixel.com/...showtopic=15291

Ben

#4 stewsmith

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Posted 23 October 2010 - 03:57 AM

Very good. Its nice to see some inspiration. I have just spent this morning rummaging through my tools and a box full of bits and bobs and have managed to build an amazing little focus/zoom gear for the 100mm Canon.
I am not sure if the Sea and Sea gear works on the 100mm and also the 100mm with a 1.4TC as well and also the EF25, but I have constructed mine so it works with the 1.4TC/EF25 or without it.

Materials used.

1 x aluminium door push plate, cut in 2 strips about 20mm wide.
1 x H & S sign, cut to the desired length
1 x toothed fan belt, cut to desired length
5 x rubber bands
5 x 4mm rivets
plumbers solvent cement

Tools used.

Tape measure
Battery drill
4mm drill bit
File
Stanley knife
Rivet gun




I have tested the gear with the 100mm and the 1.4tc on and also with just the 100mm on land. The only thing left to do now is to wait for the rain to stop so I can take it out side and spray it matt black. Its construction is pretty solid but quite light, and best of all was about 300 cheaper than purchasing 2 seperate gears to use with the 100mm and 1.4TC/EF25 combonation. Obviously I have told Louise that I now have 300 to put towards additional camera gear. :)

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Edited by stewsmith, 23 October 2010 - 04:31 AM.

Canon 5D MK2 - Sea and Sea housed - 17-40L 100mm - Sigma 15mm FE - twin YS250 pro's and gadgets galore

 

http://www.euphoticzoneimaging.com

 


#5 hanachan

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Posted 24 October 2010 - 03:14 AM

my products:

for E-3 ZD11-22mm
http://hanachan.ddo.jp/!!kosaku/20...1122mmport.html

for GF1 45mm macro (magnetic ring)
http://wetpixel.com/...showtopic=33742