Thingiverse
Parametric Olympus reversible lens hood sized for 75-300 by fiddaritt
by Thingiverse
Last crawled date: 4 years, 7 months ago
This is a remix of http://www.thingiverse.com/thing:240706 with a few enhancements:
It separates the bayonet flange from the inner end of the hood, so the diameter can be enlarged for reversibility.
There's a test mode (in the .scad version) that prints just the bayonet, for quick size testing.
It's a bit shorter (but this is easily controlled by parameters).
This is currently sized for a good fit on the Olympus m4/3 75-300mm, but is probably adaptable to other Olympus variations.
Pictures show an aftermarket copy of the LH-61E hood for comparison.
UPDATE
The v4 files incorporate a few improvements.
There's now a locking nub on the bayonet. This still isn't quite right, so look for a v5, but the fit is snugger.
There's a "filter" mode that creates a flat rim instead of a hood, so you can glue on Baader AstroSolar film (I did this for the eclipse).
Current files:
lens_hood4.scad is the parametric creator, from OpenSCAD
lens_hood4.stl is the rendered hood
lens_hood4-filter.stl is the filter-mode version
lens_hood4-ringonly.stl is just the bayonet ring, for test fitting
It separates the bayonet flange from the inner end of the hood, so the diameter can be enlarged for reversibility.
There's a test mode (in the .scad version) that prints just the bayonet, for quick size testing.
It's a bit shorter (but this is easily controlled by parameters).
This is currently sized for a good fit on the Olympus m4/3 75-300mm, but is probably adaptable to other Olympus variations.
Pictures show an aftermarket copy of the LH-61E hood for comparison.
UPDATE
The v4 files incorporate a few improvements.
There's now a locking nub on the bayonet. This still isn't quite right, so look for a v5, but the fit is snugger.
There's a "filter" mode that creates a flat rim instead of a hood, so you can glue on Baader AstroSolar film (I did this for the eclipse).
Current files:
lens_hood4.scad is the parametric creator, from OpenSCAD
lens_hood4.stl is the rendered hood
lens_hood4-filter.stl is the filter-mode version
lens_hood4-ringonly.stl is just the bayonet ring, for test fitting