So Where's The Vignette?

With so many people having moaned about the 1.4 teleconverter not being FF and Pentax not producing a FF equivalent, I suppose it was inevitable that I'd have to try out the K1 in FF mode with the DA*300mm f4 + 1.4TC attached. And here are some results. JPG straight out of camera and resized, all at f8. So where's the vignette??

1.



2.



3.



4.



OK, OK, I cheated!!!

But it really isn't too bad with the right subject and can be used creatively if you know what to expect .




Steve

Looks very good. Can the vignette be corrected with software?

It does look very good.

Excellent set

Some very beautiful and moody images. I am really drawn to images 1,2 & 4.

Nicely shot Steve, I really like #3 for its simplicity and it would do well with a tighter crop.

They are a lovely set Steve and they do show that this converter is excellent with some (most?) lenses - I've had results from the converter where there is some vignetting and that is not always a problems to reduce/remove, but the image quality can suffer towards the edges. A little forward thinking could have resulted in a DFA converter (even though FF lenses weren't in production at that time, it was being considered/planned) to satisfy old FF, DA and future DFA lenses. Results like these illustrate how close they were to a universal converter

These images on an OLED screen, wow.

Where's the vignette? Here it is for a couple of lenses . Photos of the sky @ f8. It looks like a simple fix for PP but I haven't tried yet.

DA 300mm f4 + 1.4TC



DFA 70-210mm f4 @ 210mm + 1.4TC



DFA 70-210mm f4 @ 70mm + 1.4TC



And now for one which surprised me. The variation in brightness across the frame was natural variation across the sky, I could see it with my Mk I eyeballs. So where is the vignette?? (It's a bit of the guttering in the top LH corner, not strange vignetting )

FA28mm + 1.4TC



What the image quality is like in the corners remains to be seen...

Steve

Considering I've started to crop a lot more, I think these vignetting results are perfectly workable.

That's my view, too. IQ might tell a different story, but poor IQ in the corners might be OK for some subjects (as in the photos that started this thread). Something to investigate during the dull winter months, perhaps...

Steve