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Why is there no Nikon - Sigma SA adapter??

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wallpaperviking

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Why is there no apter for Nikon F lenses to the Sigma SA mount?

As far as I know, the only commercially available adapter for the SA mount is a M42 adapter (flange distance of 45.46) and that has a flange distance smaller than the Nikon (flange distance of 46.50), so in theory the Nikon should be easier to adapt??

People talk about there being a commercial need to make such an adapter but surely there are less M42 lens owners out there, than there are Nikon F users??

What am I missing here?
 
wallpaperviking said:
Why is there no apter for Nikon F lenses to the Sigma SA mount?

As far as I know, the only commercially available adapter for the SA mount is a M42 adapter (flange distance of 45.46) and that has a flange distance smaller than the Nikon (flange distance of 46.50), so in theory the Nikon should be easier to adapt??

People talk about there being a commercial need to make such an adapter but surely there are less M42 lens owners out there, than there are Nikon F users??

What am I missing here?
Click to expand...
There are converters out there. They don't provide infinity focus, so are basically useless if you want to focus to infinity. (Most of us do;-)

The only alternative is to change the mount, which I have done on my SD1M. It's not a trivial process, but I now have a Nikon mount Sigma camera.

If I had to do it again, I would not recommend it. The color casts which come from introducing "uncorrected" lenses to the Sigma SD1M at least, need work. Mainly PP and can be fixed, but makes it all so much more work.

If you are considering this for the SD Quattro or Quattro H, then I would wait to see what some pioneers have done first. Sigma could solve this problem by offering their own converter/mount, as Leica does with some of their cameras, but obviously this does not suit or make sense to Sigma at this time.

I know there seems to be less of an issue with mount changes and color casts according to other users on this forum who had done it on earlier Sigma cameras, and that in theory this might be reduced on the SD Q, however, I have done by stint pioneering in this field for now and will wait for a better solution.

As the SD Q H will have DNG support, I think the better way to get to your images, with them rendered as you expected them to be at exposure time is a good thing. So I won't be doing anything to slow this process down, even if it means spending some more money with Sigma on their own glass.

Welcome to Sigma camera world. It is a beautiful place.
 
mikeodial said:
mikeodial wrote: There are converters out there. They don't provide infinity focus, so are basically useless if you want to focus to infinity. (Most of us do;-) The only alternative is to change the mount, which I have done on my SD1M. It's not a trivial process, but I now have a Nikon mount Sigma camera. If I had to do it again, I would not recommend it. The color casts which come from introducing "uncorrected" lenses to the Sigma SD1M at least, need work. Mainly PP and can be fixed, but makes it all so much more work.
Click to expand...
I have, in addition to my Sigmas SD9, SD10, SD14 and SD1M a Kodak DCS14n full-frame Pro camera which I use for some specific work. I have a number of Nikkor lenses for it but honestly, I would not bother to use any with the Sigmas as in general, the Sigma lenses I have are superior.
 
There used to be one adapter from F to Sigma SA mount and it was done by JTAT in Japan. That Japanese guy stop to answer emails and vanished around 2012/2013.

What is left is a Sigma mount change to Nikon mount (reversible) by SigmaCumLaude.
 
LaMeule said:
There used to be one adapter from F to Sigma SA mount and it was done by JTAT in Japan. That Japanese guy stop to answer emails and vanished around 2012/2013.

What is left is a Sigma mount change to Nikon mount (reversible) by SigmaCumLaude.
Click to expand...
Mr. TSUBOI Masakazu, who makes the JTAT adapters, answered my e-mails in October 2016. He still has the Nikon adapter in stock for SD10 but the one for SD1 is sold out and he has no plans to make it again.
 
But SD10 and SD1 have the same SA mount (they use the same lenses).

Why a Nikon F to Sigma SA adapter for SD10 wouldn't fit into a Sigma SD1?
 
LaMeule said:
But SD10 and SD1 have the same SA mount (they use the same lenses).

Why a Nikon F to Sigma SA adapter for SD10 wouldn't fit into a Sigma SD1?
Click to expand...
Both cameras can fit Sigma lenses without problems, but the mounts have physical differences. Originally, the SA-mount was a dual-bayonet mount with inner (SA-IB) and outer (SA-OB) bayonets, the latter being a feature intended to mount heavy telephoto lenses, but never utilized by Sigma and consequently dropped with the release of the SD14 in 2007. Using Nikon lenses on SD14, SD15 and SD1 requires the second version of the JTAT adapter, the one that is now out of stock and no longer being made.
 
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Thanks a lot for the clarification.
 
Here is an email correspondence that I got from Adam at SK Grimes regarding a Nikon - Sigma SA adapter..

My email to him.....

"Hi Adam,

I would like to get a quote on changing the rear mount of the Samyang 24mm TS-E lens to a Sigma SA mount.
As far as I know, this lens comes in Nikon, Canon, Sony A and Pentax K mounts.
No Sigma SA unfortunately..
Given that the Pentax K has the greatest flange distance (45.46mm) I assume that this is the best candidate for the conversion? Is that correct?

I also have a Hcam Master (Canon Eos - Sony E mount tilt/shift adapter) that I use with my Sony A7RII and was wondering if an additional (thin) adapter could be made to connect it to that?
Or have I gotten it completely wrong and the best candidate for the job is actually the Canon mount lens which has the same flange distance of 44mm as the Sigma SA?

This is somewhat of a separate query but I was also wondering if there was the possibility of having a Nikon F - Sigma SA adapter made? That would be the best option by far...
As far as I know, there was a Japanese company called "JTAT" that had previously made such adapters and I think they are out of business.. I also know that there is currently a M42 - Sigma SA adapter that is commercially available and that has even less flange distance room to work with than the Nikon registration..
So in theory, a Nikon - Sigma SA adapter should be possible..
If I was able to get a Nikon - Sigma SA adapter made up, then I would also be able to use the same lens on my Hcam Master through commercially available Nikon - Canon Eos adapters..
So yes, a Nikon - Sigma SA adapter would be the best option and am hoping this could be made.

Phew, hope that all made sense!
Look forward to hearing your thoughts and to see if this should be possible? "

and his response.........

" Thank you for the inquiry. I looked over a couple images of the Samyang 24mm TS-E lens. I was hoping to find a image of the back portion of the lens where it connects bayonet to figure out what type of material and spacing we have to work with. From what I can tell, the bayonet mount is part of the rotational componentry of the lens. The spacing differences between models are probably all contained within this component. but just in case they are not, the Pentax K mount would probably be the best option. Subject to inspection, this type of conversion ranges in the $275 –$500 range.

Since the Sigma SA and Canon both have the same 44mm flange to focal distance, the lens will need to be setup for one or the other. To use the lens on a Sony E, you will need a Sigma SA to Sony E adapter. Regarding the Nikon to Sigma SA adapter, the dimensions of the bayonets and their offsets present a very unique challenge. Basically, the bayonets are about the same size, so when you space the Nikon receiving mount 2.5mm off the bearing surface of the Sigma lens mount, you end up placing the Nikon bayonet knobs into the wall/channel of the Sigma camera mount. Orientation and manufacturer tolerances would be critical as it be easy for a variation in the Sigma camera or Nikon lens to result in a jammed or not functioning adapter. Introducing a locking pin this adapter would would also require a batch run of probably a couple hundred pieces to get the required leaf spring mechanism. It’s not really an adapter we are interested in making at this time."

So basically, as much as I would like to try a Sigma SD Quattro H, its inability to adapt other lenses, particularly tilt/shift lenses, seems all too hard..

I am also still confused as to those that say that Pentax K lenses can be adapted and still maintain infinity focus, as the flange distance of the two is different...

Can anybody explain please?
 
I just stumbled into this thread hoping there was once again a nikon adapter.

To answer the pentax question. The k mount is the same as the SD sigma mount. So you can take a k mount lens without pins pushing out and it will just mount fine on a sigma camera. Since the pentax registration distance is 45.5 an sigma is 44, the infinity mark will be beyond infinity, so you need to step back a bit.

I used an m42 to k mount adapter to correct a pentacon 6 to m42 adapter that was 1mm too long. So now it fits perfect on sigma camera.
 
The art lenses are optimized for the SS q cameras and anything else will never give you the results you wish for

the Nikon to SA adapter I once had was extremely difficult to use and only accepted a few Nikon lenses

I wouldn't dream any further in this direction if I were you
 
adegroot said:
The art lenses are optimized for the SS q cameras and anything else will never give you the results you wish for

the Nikon to SA adapter I once had was extremely difficult to use and only accepted a few Nikon lenses

I wouldn't dream any further in this direction if I were you

--
When you change the way you look at things, the things you look at will change. -Wayne Dyer (this is already true on the molecular level: the observed is influenced by the observer).
Click to expand...
Been there done that, this is not a trivial issue with modern lenses. My solution was to change the mount on the camera for my SD1M. The results, I have a great black and white camera now and a good color one with some additional PP steps. Aside from the focusing issues outlined earlier in this thread. (It is necessary to have good focus, focus confirmation and the ability to focus to infinity). Otherwise why make such a big investment in lenses. Many of the Nikon lenses have protruding bits, do not support manual focus and manual stop down which are all get in the way of making this work.

Be careful or you may do a lot of expensive damage to your camera with some $10 chinese bits and a lot of enthusiasm.

I am thinking of what I will do now as I am considering a SD Q H purchase. There are four options that may/will give you good results.
  • Just buy Sigma Art lenses (works but expensive)
  • Change your Nikon to Sony A series and buy a Sigma E adaptor (also requires changing all your Nikon lenses out ... not so good)
  • Change the mount on the SD Q or SD1M. I have done this on the SD1M and this works well with some limitations. (BW image taken yesterday attached). To my knowledge no one has tried this on an SD Q or SD Q H yet
  • Keep the Sigma mount and modify the lens mount (Leitax has a solution for this and yesterday provided me with an example of this working for Leica lenses ... nice). This will mean you have Leica (or perhaps other) lenses which will be converted to a Sigma mount.
Given that the new Quattro seems to create great OOC jpegs, it might make sense to go with the first option. Perhaps with the new Art zoom, or use the 24-35 Art as a baseline. I have one with a Nikon mount I am considering converting to Sigma mount (heresy) for landscape.

Sorry if this answer creates more questions or dilemmas for you, but I started out on this path a long time ago, and have come to understand the importance of the connection between lens, sensor and the software which makes all the adjustment so things turn out well. If you don't enjoy doing a lot of PP then I would suggest the "native Sigma" route, despite the cost that may entail.

There are good Sigma old lenses out there as well, if you are willing to manual focus, like the 70mm Macro 2.8.



SD1M with Zeiss 50/2 Makro-Planar with Nikon Mount adapter
SD1M with Zeiss 50/2 Makro-Planar with Nikon Mount adapter



Good luck.
 
adegroot said:
The art lenses are optimized for the SS q cameras and anything else will never give you the results you wish for

the Nikon to SA adapter I once had was extremely difficult to use and only accepted a few Nikon lenses

I wouldn't dream any further in this direction if I were you

--
When you change the way you look at things, the things you look at will change. -Wayne Dyer (this is already true on the molecular level: the observed is influenced by the observer).
Click to expand...
Can you make photos like the ones that can be seen here?

http://www.verybiglobo.com/extremely-swirly-bokeh-short-tutorial/

I'm planning to get a Petzval 85mm lens in Nikon mount, which I'll be using on my Sony cameras (yes, there is an adapter, and I already have one). I want to mount it on my Sigma camera(s) too, so when I find a Nikon to SA mount adapter, I will buy it, as long as it's not too expensive. Otherwise I'll use a Nikon to M42 mount adapter and an M42 to Sigma SA mount adapter. I won't worry so much about the distance, because I'm not going to be using it for shooting stuff at infinity anyway (mostly macro shots of flowers and close-up of model portraits - 15 feet or closer).

--
Scott Barton Kennelly
http://www.bigprintphotos.com
 
Last edited:
Scottelly said:
adegroot said:
The art lenses are optimized for the SS q cameras and anything else will never give you the results you wish for

the Nikon to SA adapter I once had was extremely difficult to use and only accepted a few Nikon lenses

I wouldn't dream any further in this direction if I were you
Click to expand...
Click to expand...
 
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