Kiev 10/15 Lens To Sony A7II-series Body Adapter

thingiverse

The Kiev 10 was the first Soviet-built 35mm SLR with automatic exposure, utilizing an internal linkage to control the body and regulate the lens aperture - a ring for controlling the aperture does not exist on the lens. The same lens mount is used by the Kiev 15 TEE, but nothing else, and the internal aperture linkage complicates adapting to another mount significantly. In http://www.instructables.com/id/Using-Kiev-10Kiev-15-Lenses-On-Digital-Cameras/, I demonstrated a method for hacking an adapter to provide a mount with an aperture control ring for Kiev 10/15 lenses, but it was cumbersome. The adapter shown here enables Kiev 10/15 lenses to be mounted and focused at infinity on a Sony E-mount body while providing aperture control using a less-than-20-degree twist of the lens in its mount - similar to my earlier Thing 137540. Sony has two "flavors" of E-mount, with the second being tighter, making adapters designed for the first not necessarily suitable; this E-mount flange is designed to fit the later version, as used by the A7II series cameras, and also fits the earlier version (with minor play). Printer Settings Printer Brand: MakerGear Printer: M2 Rafts: No Supports: No Resolution: 0.25mm Infill: 20-25% Notes: This adapter prints without supports in the orientation with the E-mount at the top and Kiev 10/15 mount on the bed. The one shown was sliced using Cura, adding a brim to ensure the Kiev 10/15 flange would stay flat and using two layers of skin with 20% fill; it was printed in red PLA at 120mm/s. The 20160404 version is a trivial improvement on the 20160403 version, simply rotating the Kiev 10/15 flange so that the lens sits perfectly upright when the internal coupler has the lens aperture wide open. Of course, as you turn the lens to change the aperture, it will not be sitting perfectly upright, but that's harmless. The third photo shows the 20160404 version printed in stainless steel PLA at 0.1mm and polished. From this it seems the adapter may be very slightly too long... I may be posting a revised version shortly. Post-Printing About the Red PLA... I have LOTS of 3D-printed adapters, so it's getting difficult to make sure I grab the right one. Thus, not only am I clearly labeling the adapters, but I've started color-coding them. Red seemed the obvious color for a Russian lens adapter, and the red PLA I have is a nice material, but it is far from opaque. In fact, it leaks a huge amount of red-tinted light, which isn't okay. The fix for both highly-visible labeling and light sealing is paint. The entire inside of the adapter was given two coats of a flat black latex paint. That paint doesn't bond very well to PLA, but it does nicely fill and bond to the gaps between extruded strands. The white paint used for the lettering is artist's acrylic. Both are applied with care. Flanges and dimensions After building many adapters, I've learned that published dimensions for lens mounts are often wrong... or perhaps I should say "referenced to things other than what you'd have guessed." There are also printing tolerance and extrusion dimension issues. Thanks to all that, there were four generations of not-quite-right adapters before the design posted here. The design elements here seem to work on both my MakerGear M2 and Wanhao I3, with the Kiev 10/15 flange quite tight and the Sony E mount just about perfect on my A7II, but your mileage may vary.... Note that a 0.25mm error in depth is the difference between my Mir 20 being in focus at infinity vs. 1m! Custom Section Using the adapter Although the adapter was designed for the newer A7II-style E-mount, it also works on the original mount (e.g., the original A7 shown in the above photo), but with a tiny bit of play. Bayonet the lens into the adapter before mounting the adapter on the camera. Also watch for, and remove, any plastic shaved off the Kiev 10/15 mount by the lens: this shouldn't happen after the first few times, but being careful is easier than cleaning shavings out of your camera body. The aperture adjustment is made by rotating the lens slightly in the mount; a little hook catches the internal lens aperture coupler. Be sure to hold the adapter, rather than the camera, when turning the lens in the adapter. Also be careful not to turn the lens enough to dismount it... there is no locking mechanism on this adapter.