DX lens on FX using Teleconverter

[pistnbroke]

I thought photographers had imagination ?

First post seems fine to me ..if you dont have the equipment you can't try it . If you have you can ...I dont see a problem.

 

[BackdoorArts]

We do. Just not yours.

 

[Marcel]

OK, you got me curious Steve. So I tried the 35mm DX lens on my D600 with the Kenko 1.4 tele-converter.

Well, seems it does cover the full FX sensor. A little bit of vignetting and net loss of sharpness, but it did work… I'm surprised. Here's the pic to prove it:

 

[AC016]

Thankyou Marcel!!! If the question was asked clearly in the first place, we would not have had to gone through 3 pages of thread!

 

[pistnbroke]

Thanks marcell ..I am waiting the 1.5 so it might remove the vinyetting .....nothing wrong with the original post then ...

 

[Marcel]

Thanks marcell ..I am waiting the 1.5 so it might remove the vinyetting .....nothing wrong with the original post then ...

Guess not, but you must beware as some zooms have a protruding back element where the tele-converter has a protruding front element. You really don't want these two colliding while focusing.

 

[pist&broke]

Well my 1.5 converter arrived and no problem a 10-20mm DX sigma filled the FX frame with no vinyetting . a 18-200 also worked fine as a 28-300 zoom. No problems with exposure etc .The pictures looked fine on an imac 27 so I dont think it would be a problem for say wedding album size prints......
However if you zoom in to detail in say brickwork there is a substantial loss if you use the converter on FX or DX ...Now I know many use these for bird photography but this DX on FX is a very interesting senario and may be of use to some owners of DX lenses with FX bodies . This was a Kenko of 4 elements dating from maybe 1995 ( element is recessed so any lens can be fitted)
Maybe more modern Nikon teleconverters may give better results if you are able to fit your DX lens.

 

[WayneF]

Now try this....

Put a DX lens on a 1.5 teleconverter and fit to an FX camera ........fills the frame .......

It should work. Technically, you may need 1.7x instead of 1.4x, because DX is FX/1.5.

Here is FX with a 1.7x teleconverter on a 105mm lens. Lens does 1:1 by itself, which means it should show 36mm of a ruler.
At 1.7x, then 36/1.7 = 21mm should fill the frame, and it does. This is f/32, 180 mm.

Test is not a DX lens, because the Nikon teleconverter is only compatible with a few longer lens, this 105mm included. But the 1.7x teleconverter does show frame width / 1.7.

 

[Rick M]

Nice catch Sparky and Glenn . It's amazing how they hate us, yet try to get back in!