R5 lunar photography with stacked EF extenders

Started Dec 14, 2021 | Discussions thread
J.K.T. Contributing Member • Posts: 555
Re: How did you stack the EF 2x III and EF 1.4x III

Bigger wrote:

John Crowe wrote:

That explains it! Thank-you. So a less risky, non-do-it-yourself would be an EF 2x II, any EF 1.4x, and Canon EF to RF adapter? I am just trying to keep future possibilities open.

I am not sure if you mentioned it somewhere, but did you get autofocus with this setup? Would the setup I mentioned maintain AF?

I would recommend the RF 1.4x over the EF 2x ii. It will AF to infinity with an EF/RF adapter between EF 2x iii & RF 1.4x.

I have not tried the EF 2x ii or 2x ii, but 1.4x iii is way better than 1.4x ii. I have not noticed a difference between EF 1.4x iii and RF 1.4x, but that pair is not yet fully tested.

If you go DIY, then I'm not sure the Commlite is the best choice. At least mine did not have springs behind each pin and it is prone to communication errors due to that. On the other hand, it was easy to dissamble for modifications. That made the cleaning easy.

 J.K.T.'s gear list:J.K.T.'s gear list
Canon EOS 7D Mark II Canon EOS RP Canon EOS R7 Canon EF 135mm F2L USM Canon EF-S 17-55mm f/2.8 IS USM +15 more
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