DX lens on FX using Teleconverter

Re: DX lens on FX

I think my post fully explains it. However I wanted to know if anyone had tried it or would try it and let us know the result.

A far as I know you can only get FX teleconverters which in simple optical terms take the centre of image and spread it over the full frame to give the effect of a 1.5 increase in focal length.
So logic would dictate that if you fit a DX lens to a FX converter it will take the centre of the image and spread it to FX

Ie you in some circumstance can use a DX lens on an FX body and have it fill the frame.
 

BackdoorArts

Senior Member
Re: DX lens on FX

Fills the frame, but I suspect it also compromises clarity via the TC. I'm guessing that 10-16MP's with the DX crop would give you enough resolution for 95% of what you might want to do with the shot anyway, and for the other 5% good software upscaling might still beat what you lose on the TC.
 

gqtuazon

Gear Head
Re: DX lens on FX

I think my post fully explains it. However I wanted to know if anyone had tried it or would try it and let us know the result.
Well, no it does not explain anything that makes sense. Nikon has a 1.4x TC, 1.7x TC and 2x TC and not a 1.5x TC which is why I questioned it. The Nikon 1.4x TC is only compatible with certain FX AF-S lenses and there are no DX lenses that can use it without damaging or modifying your lens (physical limitation). So both of your suggestions are non-starter to begin with.

This is like suggesting to match male connection to another male connection.

 
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Re: DX lens on FX

kenko teleplus 1.5 . full electronic coupling and worm drive for older lens.

Remember Quantazon a mind that is not fully open is fully closed.
 

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jdeg

^ broke something
Staff member
Re: DX lens on FX

kenko teleplus 1.5 . full electronic coupling and worm drive for older lens.

Remember Quantazon a mind that is not fully open is fully closed.

Okay, you should've said that in your first or second post to avoid confusion. It looks like that would work on a DX lens, but add in what backdoorhippie said above...

Also, I'm pretty sure Glenn's mind is wide open. There's a photography joke in there somewhere........ (more ellipses = thought & upside down question marks ¿)
 

gqtuazon

Gear Head
Re: DX lens on FX

kenko teleplus 1.5 . full electronic coupling and worm drive for older lens.

Remember Quantazon a mind that is not fully open is fully closed.

So, lets say we are using a Nikon 35mm f1.8G DX with this Kenko 1.5x TC, mount it on a FX camera, you get an equivalent 52.5mm FOV which is the purpose of the TC.

The Kenko that you suggested will not register the correct aperture adjustment with the Kenko TC using a DX lens unlike when you use a Nikon 70-200mm f2.8 VR and the newer Kenko 1.4x TC, it will display the correct aperture of f4 instead of f2.8. Using other lenses with the Kenko will still work regardless whether you use it with a full frame or DX camera.

If you are expecting to get a full frame experience by using a DX lens plus a TC, then I am interested in learning on how you can achieve that. I will be surprise on how you can make a D800 produce 36mp file using a DX lens plus TC if that is what you are expecting.

But again, your post lacks the details and the overall objective. It would have been more appropriate if you asked: What will happen if you use a discontinued Kenko 1.5x TC with a DX lens and mount it on a FX camera?
 

BackdoorArts

Senior Member
I took the intent of the original post as more a "gee whiz" thing than as an actual suggestion, and had more to do with getting a frame full of light from the DX lens than it did with a practical solution that someone might look to implement. Technically, while the 1.5x is discontinued and impractical from a functionality point of view, you could also get a full frame from a 1.7x or 2x converter as well (and probably a 1.4x with a zoom in some/most of its focal length).

The real question is "Why?" given that you've likely gone FX for image quality reasons, and every part of this game of numbers - from the traditionally at-best-equal-but-probably-inferior nature of DX glass, to the reduced IQ introduced by the TC - does nothing but introduce impediments to image clarity and quality? If I like my DX glass then I'll just shoot in cropped mode and be happy.
 
here we go again moderators jumping in all over it again ....all I said in the first post was now try this .......and in the second asked if someone had tried it

we only need OHK and I get banned again just for making a suggestion .......

5..4...3...2...1 banned

 
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gqtuazon

Gear Head
Is that a homophobic comment !!!...can the moderators arbitate !!!!

hey humour on Nickonites thats a first ......

Hey Pist - Let me make this clear with you. Whether I am a moderator or not, I try to answer most of the peoples posts here at Nikonites. Regardless on who makes the post, moderator or not, if someone is posting an inaccurate or wrong information, I tend to question it and it so happen it includes most of your post. If your post were correct, then I will leave them alone or I might even say great post and thanks for sharing this useful information.


To answer your question, since your initial question did not specify current teleconverters and since this is a nikonites website, it is implied that we are talking about Nikon equipment unless it is specified otherwise. The picture that I posted should answer your question on why it is not possible to use a Nikon TC with a DX lens which is a true statement and there is nothing for me to explain further.

However, you still have not addressed my question to YOU from post #9. Well, let me take that back, you don't need to since you are a very busy pro. :rolleyes: LOL!
 
Like I said waiting for the 1.5 to arrive before I can answer your questions but as it has all the pins and feeler it should be ok.
Lets say you have an 85mm f 2.8 DX lens and buy a D600 you may still want to use it at F4 on the D600 and get the same field of view.
 

§am

Senior Member
all I said in the first post was now try this .......and in the second asked if someone had tried it

NO! What you actually said was "now try this" and also "fills the frame". You then asked in a later post if anyone had tried it?
So in your original post, you not only implied that it fills the frame by making it a statement, but also by the introductory words were telling people to do something, as opposed to asking them, or suggesting they try something!!!

Maybe a crash course in correct use of grammar & spelling and 'talking to people' etiquette is needed.


The original post would have been a better if it was worded along the lines of;
"Would putting a DX lens on an older/discontinued 3rd party 1.5x TC and attaching it to a FX body fill the entire frame?"


I'm not posting this with my 'moderator cap' on, merely as a member of the Nikonite community, and as with all my posts, whether posted as a mod or not, I am subject to the same rules & regulations and punishments as anyone else on here.
 
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dear dear may the lord preserve us...

I make a suggestion....no one comes back and says its been tried..see post 2xxxx
No world war three breaks out .......

If you have a suitable converter try it and let us know ..if not wait till mine arrives .....

Whats the problem ...???
 

BackdoorArts

Senior Member
I have to be honest and agree with everyone who was absolutely confused by your original post. It seems like an absolute assertion. Perhaps the use of alternate punctuation next time, because a '?' would have certainly helped in places that '....' may have left too much to the imagination.
 
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