EF extender stacking

Started 4 months ago | Discussions thread
OP J.K.T. Regular Member • Posts: 304
Re: EF extender stacking

Not quite. Mounting FDn 500mm f/4.5 L on 8mm thick FD->EF adapter and then on RF->EF and RF 1.4x, the maximum focus distance is about 35m. That is a bit too close for larger targets. That 8mm adapter acts as 10mm extension considering the flange distances.

I initially got an EF modified FD 1.4x, but the image quality of that is pretty abysmal compared to the RF 1.4x ... or even the EF 1.4x II. Unfortunately RF->FD adapter can't be used in front of RF extenders. The aperture lever does not clear the extender protrusion.

Admittedly this got a bit off-topic.

 J.K.T.'s gear list:J.K.T.'s gear list
Canon EOS 7D Canon EOS 7D Mark II Canon EOS RP Canon EF 135mm F2L USM Canon EF 300mm f/4.0L IS USM +13 more
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