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Taylor Hobson Studio Varotal lens TV88 / image-orthicon adapter (M43, NEX)

3D model description

Taylor Hobson Studio Varotal zoom lens from the 1950s.. is not usually a trouble free mount to DSLRs! Here are a couple of prints to adapt the lens to M4/3rds or Sony E-mount/NEX cameras.
1) You will need 4 off M3 screws to attach the adapter print to the lens
2) the prints need to be bolted to the lens flange, this is easily achieved if you can drill and tap M3 holes in the aluminium flange. A template print to line these up is included: if you are not very accurate with this, it's best to use the template for the top two holes, then use the adapter to line up for the bottom holes. Drilling these holes does not affect the use of the lens on it's original mount. The TV flange is easily removed from the lens to do the drilling and threading: unscrew the rear lens block to reveal 3 screws that hold the TV flange.
3) Versions of the TV88 flange (image-orthicon, Marconi, Pye, EMI etc.) with 4 locating screw holes. Version 1 of the adapter wasn't designed with these in mind, but it is an easy change to the position of the "new" M3 screws if the version 1 placement is in a void.
4) There is no obvious flange depth adjustment on the lenses I've seen (other than the depth to which the rear lens group is screwed in). The prints (v1) have no adjustment either, other than adding shims.. so it's possible there will be some slight error and the lens will not be exactly parfocal. However, both the M43 and NEX versions worked satisfactorily on my copy of this lens.
5) Obviously the lens is too heavy for a 3D printed mount, but if the lens is supported, the prints are quite capable of holding and supporting small DSLRs, eg BMPCC, GH4 or Sony A7.

3D printing settings

FDM, 0.2mm layers work for my printer..

  • 3D model format: STL

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