Very wide/fisheye lens RF for R5/R3 system from Canon?

puffo25

EOS R5 - Fine art landscape, travel,astro and pano
Jul 18, 2017
146
50
57
italy
Hi all. I am looking for a very wide and bright lens (ie F/1,8) for my R5 full frame camera.
I do astro and landscape photo and sometimes I need a wide lens.
Currently I have the RF 15-35mm f2.8 which is of course great BUT in some occasions, a brighter and wider lens will be very much welcome.
Sadly the old (and still good) EF 8-15mm Canon fish eye does NOT cover properly the full frame of my R5 as it works better with a different sensor...

Why canon so far has NOT put in their production calendar a wide lens?
 

neuroanatomist

I post too Much on Here!!
CR Pro
Jul 21, 2010
28,090
8,303
Sadly the old (and still good) EF 8-15mm Canon fish eye does NOT cover properly the full frame of my R5 as it works better with a different sensor...
It should work on your R5 as on any FF camera – circular fisheye at 8mm, full-frame fisheye at 15mm. Is it not doing that?
 
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