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New EdMika Polymer FD to EF conversion kit
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PostPosted: Sat Mar 15, 2014 8:19 pm    Post subject: New EdMika Polymer FD to EF conversion kit Reply with quote
Mini-Review for the new EdMika Polymer FD to EF conversion kits.

I was scanning through the various ebay listings and came across EdMika's new Polymer mount conversion/converter/adapter kits.

http://www.ebay.com/sch/i.html?_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xedmika&_nkw=edmika&_sacat=0&_from=R40

He has recently added many more conversion kits for the FDn (New FD mount) series lenses and they are no longer made of Brass. The text of his ebay listing describes his reasoning for the change in material, and I think it is a good move. The Brass kits were extremely well made but they were heavy. I bet that in some cases the new brass mounts were heavier than the lens they were going on. The brass color also didn't really match the chrome plating of the camera mount and could also cause light reflections near the sensor.

These new Polymer mounts are also extremely well made, weigh almost nothing, and are completely black in color. I really appreciate the weight savings when I use the lens with my SL1. I am sure users with larger cameras will feel the same way.

I ordered the kit for the FDn 50mm 1.4 and it arrived in just 3 days. The package includes a new mount, "Ed Bushing" (to engage the aperture), and a EdMika EOS lens cap.

The kit does not come with any instructions so you have to watch all the videos on the ebay listing page to get a good idea of how the various FDn lenses are taken apart and them assembled with the new mount. The kit is very easy to install and fits really well.

Here is the video that applies to to FDn 50mm 1.4 because it uses the "Ed Bushing" that replaces part of the original aperture linkage.

https://www.youtube.com/watch?v=ats-wQOkreY

In my photos I show the partially assembled lens with the old silver colored ring beside the lens and the new "Ed Bushing" installed in position. The "Ed Bushing" is also black in color and made of the same Polymer material.

The new Polymer rear lens cap is interesting, and lower in profile, but I think I prefer the standard Canon cap.














Last edited by msowsun on Sat Mar 22, 2014 4:32 pm; edited 1 time in total


PostPosted: Sat Mar 15, 2014 11:35 pm    Post subject: Reply with quote
Wow an interesting piece of kit. Well engineered.

Is the acrylic cast and machined or is it done on a 3D printer?

Canon could have done this years ago in the way that Nikon converted non AI lenses.


PostPosted: Sat Mar 22, 2014 4:58 pm    Post subject: Reply with quote
The EdMika ebay listing says they are machined.

http://www.ebay.com/itm/Canon-FD-50mm-1-4-EDMIKA-EOS-EF-lens-mount-conversion-converter-adapter-kit-/181346869175?pt=US_Lens_Adapters_Mounts_Tubes&hash=item2a391d9fb7

Quote:
Machining tolerances have gone from holding all dimensions within 1/1000 of an inch to less than 2/10,000 of an inch, a 5X improvement. This is because the high performance polymer allows the use of large woodruff or key cutters that enable the deep underside cuts to be made in just one fixture setup. Brass required short cutters that forced me to machine one side and then the other and these multiple setups introduced some dimensional variation.
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