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Yashinon DX 40mm F1.7 converted to Sony E mount
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PostPosted: Thu Jun 23, 2016 3:20 pm    Post subject: Yashinon DX 40mm F1.7 converted to Sony E mount Reply with quote
Thought I would share a couple of my other conversions as of late, and I said to lightshow I would show him this one a while back, this one comes from a Yashica GX 35

This is actually the easiest lens I have done, If you use the body cap itself to create the holes for the focus rails all you need to do is adjust the base of the lens to the correct distance to give you infinity focus

The sharpness is superb and it's a nice small lens. I have done the conversion to the yashinon 45mm F1.7 from the Yashica 35 GS, but I rate this lens higher in regards to colour and sharpness

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Sorry I don't mean to spam this section, but I was doing some product images today and thought I would do these too for people that might be interested


PostPosted: Mon Jul 18, 2016 1:14 am    Post subject: Reply with quote
nicely done Like 1 small
I used body cap too years ago. but now I prefer thin M42-NEX adapter or reverse ring adapter to NEX


PostPosted: Mon Jul 18, 2016 1:48 am    Post subject: Reply with quote
Good job!

I have a broken 35CC (35/1.8 lens) lying around here, maybe I should give it a try...


PostPosted: Mon Jul 18, 2016 3:59 pm    Post subject: Reply with quote
Great conversion. I use NEX to C Mount for most of my conversions, all metal and very thin.

https://www.amazon.co.uk/Fotga-Canon-mount-NEX-3-Adapter/dp/B009GFX1C4/ref=sr_1_2?ie=UTF8&qid=1468857420&sr=8-2&keywords=c+mount+to+nex


PostPosted: Mon Jul 18, 2016 4:23 pm    Post subject: Reply with quote
Lloydy wrote:
Great conversion. I use NEX to C Mount for most of my conversions, all metal and very thin.

https://www.amazon.co.uk/Fotga-Canon-mount-NEX-3-Adapter/dp/B009GFX1C4/ref=sr_1_2?ie=UTF8&qid=1468857420&sr=8-2&keywords=c+mount+to+nex

The opening is too small if you use the lens on a FF camera. Better use Click here to see on Ebay or thicker one Click here to see on Ebay .


PostPosted: Tue Sep 06, 2016 9:14 am    Post subject: Reply with quote
Apologies for the long delay...family matters,

Yeah the only thing we really get here are the body caps, I always mean to get some of the reverse ring adapters but always procrastinate.

with this lens in particular using the body cap made it very easy to convert, almost the perfect thickness and used the body cap for the rail guides


PostPosted: Tue Sep 06, 2016 3:51 pm    Post subject: Reply with quote
Boris_Akunin wrote:
Good job!

I have a broken 35CC (35/1.8 lens) lying around here, maybe I should give it a try...


I actually tried to do a conversion on one of those, spacing isn't an issue at least but there isnt a manual iris in the lens, I sort of screwed the conversion up as I tried to install one but couldn't get enough space.

I must say I am very impressed with the 40mm, the 45mm from the electro GS was fantastic but this lens surpasses it.


PostPosted: Wed Mar 07, 2018 12:49 pm    Post subject: Reply with quote
That's interesting. Was looking for a fix to the 40-45mm. Among mirror old lens like that found nothing. Came across alterations from rangefinder cameras. Saw a photo of this yashinon 40mm and 45mm on Sony A7. The Chinese comrades even made an adapter specifically for the 40mm. https://www.ebay.com/itm/Camera-Adapter-For-COLOR-YASHINON-DX-40mm-F1-7-35GX-40-1-7-Lens-to-Sony-NEX/371926349513?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

p/s I'm not good friends with a hammer and chisel, but what the hell can I try ) Rolling Eyes


PostPosted: Sun Apr 29, 2018 4:47 pm    Post subject: Reply with quote
May I ask, what's the second smallish lens is for?

Is it just a decoration, or it had some functional purpose?
I've seen an old bodies with a second lens for viewfinder, could this be it?


PostPosted: Sun Apr 29, 2018 7:17 pm    Post subject: Reply with quote
aidaho wrote:
May I ask, what's the second smallish lens is for?

Is it just a decoration, or it had some functional purpose?
I've seen an old bodies with a second lens for viewfinder, could this be it?


It is a photocell that measures the light for setting the auto-exposure.


PostPosted: Sun Apr 29, 2018 8:08 pm    Post subject: Reply with quote
dan_ wrote:
It is a photocell that measures the light for setting the auto-exposure.

Thanks for the info, dan_.

Even if it's useless today, I love the unique look.


PostPosted: Sun Feb 24, 2019 12:41 am    Post subject: Reply with quote
lovely job. i use a nex reversing ring and file off the filter thread.
most of my conversions are to m39 now, then i can use the lenses on other cameras. anyone any idea where i can get m39 male threads cheaply?


PostPosted: Thu Oct 08, 2020 6:36 pm    Post subject: Reply with quote

This Yashica Yashinon-DX 40mm/1.7 has become my favorite standard-carry lens the past year. This thread and others here have been very inspirational and informative. Tried it again today.


PostPosted: Wed Sep 22, 2021 6:47 am    Post subject: Reply with quote
Hi,

I appreciate I'm five years late to this discussion, and maybe most of you are no longer here, but I'm looking for further info on how this conversion is done. Unfortunately half the links in this thread no longer work either.

Could the OP or anyone else point me to a step-by-step guide on converting the 40mm to E mount? I've found a few guides to the 45mm but I understand this is a little different.

Will I need a 3D printer or can I get away with grinding adapter rings? Which ring is best to use as the basis?

Any help appreciated as I'm keen to use my mint 40mm.

TIA.


PostPosted: Wed Sep 22, 2021 1:26 pm    Post subject: Reply with quote
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PostPosted: Wed Sep 29, 2021 2:52 pm    Post subject: Reply with quote
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PostPosted: Sun Oct 03, 2021 11:20 am    Post subject: Reply with quote
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PostPosted: Fri Jan 28, 2022 7:44 am    Post subject: Reply with quote
diplo2020 wrote:
petersongame217 wrote:
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PostPosted: Wed Feb 02, 2022 10:05 am    Post subject: Reply with quote
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