I've been using the EF180mm extensively the past week and what I'd to see is a gadget to get me nice, soft light. Could be a simple as a softbox you velcro around the lens hood and attach to an on-camera flash.RF 200mm f4 macro ,focus stacking special lens
That would be a fantastic travel lens!17(20)-70/4L IS USM
The front elements of these two will have the same size (500/5.6 vs 550/6.3). Both will need a 95mm filter sizeRF 500mm L f~5.6 DO. Or RF 550mm L f~6.2. (Light Weight)![]()
Quite so. I would prefer the 550/6.3 as we would get up to 10% extra resolution. As I have written elsewhere, the loss of a 1/3rd stop can be compensated for by upping the iso if the light is poor and down resolving to the f/5.6 size. I'd buy either of them at a drop of a hat if Canon could keep the price down to that of the Nikon 500/5.6 PF.The front elements of these two will have the same size (500/5.6. 550/6.3). Both will need a 95mm filter size
You wouldn't be thinking of putting a Nikon 500/5.6 PF on a 5DSR or R5? Surely not.A Nikon F mount (for E lenses) to Canon RF converter![]()
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Yeah. Looking for the sweet spot of the most magnification in a sharp, lightweight prime that just hits the diffraction limit on an R5 with a 1.4X TC. Somewhere in this area.The front elements of these two will have the same size (500/5.6. 550/6.3). Both will need a 95mm filter size
I'd also like to 2nd this one! A single extra wide lens that reaches 70mm to avoid needing 24-70 when traveling light. Canon did a 17-70 patent but at a slower variable aperture. I think the 17-70mm f4 L IS USM would be a MAJOR seller for Canon!17(20)-70/4L IS USM
It could also be 17-70 3.5-5.6 L serving decently enough as an astrophoto lens (at 17mm f/3.5) for these cases where we really want to take only one travel lens (in addition to our birding lens of course !I'd also like to 2nd this one! A single extra wide lens that reaches 70mm to avoid needing 24-70 when traveling light. Canon did a 17-70 patent but at a slower variable aperture. I think the 17-70mm f4 L IS USM would be a MAJOR seller for Canon!
In fact, I think a 17-70 would be in such demand that Canon could justify 2 versions of it which would both sell very well:
17-70mm f4 L IS USM $2000+ (the highest quality possible, and the one I'd buy)
17-70mm ~f5.6 $1000 (affordable with possibly higher max magnification and "good enough" quality)
So far, all the lens companies have had difficulty make an L quality lens that is sharp over that entire zoom range. Probably possible in a non L f~3.5-5.6 lens.It could also be 17-70 3.5-5.6 L serving decently enough as an astrophoto lens (at 17mm f/3.5) for these cases where we really want to take only one travel lens (in addition to our birding lens of course !)
I'd agree with that statement in general, but with this additional comment: Canon making a lens of full L quality would mean their best seals, materials, and best optical design they could do, which IMHO would be the best *anyone* could ever hope for, and thus I'd consider it a "real" L lens if the MSRP was $2K or more as I'm sure it would be "superb enough" for that difficult range. I'd be happy with either the fixed f4 or variable f3.5(or whatever)-5.6 as long as it's their best L version & quality possible.So far, all the lens companies have had difficulty make an L quality lens that is sharp over that entire zoom range. Probably possible in a non L f~3.5-5.6 lens.