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Fotasy Exakta to Nex Adapter - Avoid!
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PostPosted: Mon Apr 22, 2019 10:43 pm    Post subject: Fotasy Exakta to Nex Adapter - Avoid! Reply with quote

Hi folks,

I recently purchased a second adapter for my growing Exakta lens collection. Instead of going with another Fotodiox Pro Exakta to Nex adapter I went with Fotasy. For 15$ how could I go wrong... Rolling Eyes

I have other non "pro" labeled generic adapters, Eg lowest cost with no issue. Keep in mind this is probably because of the simplicity of the mount.

Right out of the box, most (if not all) of my Topcor lenses would not lock into the lever of the Fotasy adapter. Though other Exakta mount lenses would, like Kilfitt. So I decided to keep it.

After about a month the tooth on the lever sheared off and now no lens with lock on. I might try to transplant a lever from an old RE or Extension tube; but as the spring or screw hole might not match.

Just a warning for anyone who uses silly Exakta mount with Fotasy. The metal lever is soft and is almost too small for its purpose. The bayonet mount is also thin metal. I would avoid this particular Fotasy adapter, if you value your lens, or if you use Topcor.

I am very happy with the Fotodiox Pro Adapter for Exakta.

Regards


PostPosted: Sat May 18, 2019 8:26 am    Post subject: Reply with quote

Well,my experience with Kecay mount adapter ,was pretty much the same. First time I've tried to mount the Topcor on it,the lever has fallen out, lucky me i didn't lost the screw and spring. It took me a bit to figure out how to put back together, after that, i didn't take it out, as i think this would be the right thing,to let the lens attached to the adapter. One thing i don't like on the adapter, is that there is a gap between the lens and the adapter, in the original mount there is like a ring that protects the lens not to enter dust etc. , but in this adapter there is no such a ring, and the lens mounts by the thread only, leaving that gap÷3mm between them. The good thing is at least the lens is focusing right to infinity. Better option would be to replace the exakta mount to M42 and forget about troubles.....but that's more expensive.


PostPosted: Sat May 18, 2019 11:27 am    Post subject: Reply with quote

I'm using even cheaper unbranded one for $12: https://www.aliexpress.com/item/32777991607.html
It locks just fine and nothing fell off of it so far, but the gap between the lens and adapter with all the levers sticking out, sure looks ugly.

Someone really has to step up their game and give us a silver adapter to match Topcor lens bodies.
And cover that gap while they're at it.


PostPosted: Sun May 19, 2019 4:07 am    Post subject: Reply with quote

Just to add...

I did take delivery of two more Fotasy brand adapters, for other lens mounts, and they both interlock the bayonet fine.

One is a Nikon to NEX and the other a Minolta to NEX; both with macro helical built in.

They are nice...


PostPosted: Sun May 19, 2019 4:12 am    Post subject: Reply with quote

kiddo wrote:
... Better option would be to replace the exakta mount to M42 and forget about troubles.....but that's more expensive.


In the case of a temporary solution; a generic m39 to m42 step up adapter ring fits around the exakta mount. It can be held in place using a few spots of hot glue behind the lens bayonet tabs. Your mileage may vary.

The generic Exakta to m42 ring with 3 screws is a similar design. It can be added to a lens, without mod, as long as you use a macro focus helical instead of a standard fixed m42 to camera adapter. The 17-31mm m42 to NEX seems to cover well.


PostPosted: Sun May 19, 2019 7:30 am    Post subject: Reply with quote

aidaho wrote:
I'm using even cheaper unbranded one for $12: https://www.aliexpress.com/item/32777991607.html
It locks just fine and nothing fell off of it so far, but the gap between the lens and adapter with all the levers sticking out, sure looks ugly.

Someone really has to step up their game and give us a silver adapter to match Topcor lens bodies.
And cover that gap while they're at it.


About the gap, i thought about a 10mm black plastic ring, a little bit larger diameter then the mount, with a glued thin black foam inside of it, to prevent dust going inside that gap. The ring it can't be fixed to the lens, neither the adapter, but there should be a little window to acces the unlock lever from the adapter


PostPosted: Sun May 19, 2019 7:38 am    Post subject: Reply with quote

Blazer0ne wrote:
Just to add...

I did take delivery of two more Fotasy brand adapters, for other lens mounts, and they both interlock the bayonet fine.

One is a Nikon to NEX and the other a Minolta to NEX; both with macro helical built in.

They are nice...


I've got to have about 15 adapters ,some of them generic , others fotasy, or better novoflex which I've got in a lens deal. Of course novoflex is all quality,but i wouldn't pay that much money what is worth new, meantime,there are other cheaper options available wit the same results . I would rather get a helical Leica adapter to my camera's mount, or better the Yeenon adapter, some of them look like state of the art job.


PostPosted: Sun May 19, 2019 3:23 pm    Post subject: Reply with quote

kiddo wrote:
I would rather get a helical Leica adapter to my camera's mount, or better the Yeenon adapter, some of them look like state of the art job.

You are making a right call here in craving for a quality Leica helical.
I've tried a cheapest Chinese one and wasn't very satisfied.
It was good mechanically, but it exceeds mount dimensions and leaves not much space for the fingers.

For SLR lenses helicoid is a specialty adapter, but with rangefinders you'll want to use it more.
As such the ergonomic requirements should be higher.


PostPosted: Mon May 20, 2019 4:21 pm    Post subject: Reply with quote

Yeah, it would be interesting, especially with a limiting lever for infinity, or locking option to