Sony E-Mount body to Nikon F-Mount Lens adapter

thingiverse

This one is made based on Julian Toledo's lens adapter for using Nikon lenses on Sony NEX or A7, A7R and alike body cameras. Original one you can find here: https://www.thingiverse.com/thing:719655 Main changes for my edit are: 1) Corrected both Nikon and Sony side bayonet clearances, so neither lens nor body fit don't get loose. Nikon lens will hold on friction, adapter on the camera body will stay both using friction and body clamp. Original design was a bit loose at Sony side and WAY loose on Nikon's 2) Made some minor changes to the model structure, so it should print using only really necessary supports at the top, where "wings" for the Sony bayonet are. You can print using 5 degrees slope tolerance for the supports. Also, I have removed sharp edges within inner light diffuser, so there will be no stringing during printing process 3) Most of the problem after printing this adapter is to get actual infinity focus using manual lenses. Yeah, it's a pain :) And there is no perfect solution for when you stick lens' focus to infinity and actually to get one. Due to VERY small imperfections in printing process that can result even 150 micron delta between bayonets or just an uneven top surface you won't get a perfect infinity focus. I'll describe it below. So I've made a few editions of the adapter. Few more things considering adapter thickness for getting infinity focus: 1) AFAIK distance between top (that doesn't count "wings" that goes inside Sony bayonet) must be exactly 28.5 mm. That is how it is in the original design 2) "Safe" thickness is a bit smaller - about 28.3-28.4 mm. This way you can get "overshoot" beyond infinity, but at you'll get infinity focus for sure 3) When printing using ABS it ought to shrink a bit after cooling, making adapter's thickness a bit smaller. It's not very easy to say how much will it go, especially in top to down axis Now, how you can decide what to print - note that theese models are all the same except for being a bit different in their length: 1) F-E-Adapter_ABS That's one I've printed with ABS without any additional scaling for printing purposes. I've got really slight overshoot beyond infinity, but generally focus looks really good... Don't ask me why, but it is 0.7 mm shorter than the original design. And yes, the focus is almost perfect. Problem is that I cannot surely confirm infinity focus on other lenses since this Nikon lens is the only one with infinity for the lens itself. So it would be up to you to confirm it or not. But that's not all: I've checked this lens on Fuji S5 Pro camera with native Nikon bayonet and also got slight overshoot. So it is possible this adapter is the optimal one 2) F-E-Adapter_Generic This is the Julian Toledo's original one with 28.5 tolerance with my changes considering things I've described above. I's just a bit "upgraded" version of the original one. 3) F-E-Adapter_Experimental I've added 0.1 to the thckness of my ABS version. It looks it could fit perfectly in infinity focus using my printer, but I was lazy to actually print it. Again, please note that I couldn't make some serious testing since I have only one lens. If either of theese will fit your lens, please leave a comment. Note that shrinkage won't really make difference on adapter's diameter, author made enough of space for lens to fit anyway. Also, do not forget: if you print one with 0.2 or thicker layer, make it about 0.1 at the 28.2-28.6 height - otherwise it won't be precise enough If you can't insert lens in the adapter, just cut a bit inner lower edges of the adapter - it's just an "elefant's leg" effect making lower layers to bulge out a bit. This adapter was tested with Nikon E 28/F2.8 and Helios 81M 53/F2.0 (with broken focusing control) manual lenses. Helios was a bit loose (it has slight difference in construction), but also fit well.