Haha I just wished for the RF 100-400. This system change will cost me after they have the pro high-res body.
Patent: Canon RF 100-400mm f/3.5-5.6L IS and more
- Thread starter Canon Rumors Guy
- Start date
Ah, you're right. For some reason, I was thinking the current lens was f/4.0 at the wide end.
As a current 100-400ii owner,I have been curious to see what the RF version would bring. Reduction in size at the wide end is appreciated. 2/3 stop increase at the wide end won’t be very useful for me, and dare I say for most users. I have no idea what that costs in terms of design, but I would be happy with f/5.6 throughout the zoom range if it saved some size or weight.
Oh well, some day I’ll own the RF version, but only after I can get it used and the extenders are available.
Oh well, some day I’ll own the RF version, but only after I can get it used and the extenders are available.
My thought exactly. There has to be something around 18-55 to sell for pretty cheap as the kit lens for this new RP. The f4 lens on the R is to expensive and the 24-240 seems like it would be an upgraded kit at best.
Thanks, guys, for pointing that out and showing my lack of precission
But there is also the real aperture of f/3.83*, so why not calculating with that?
*knowing, that the other patents are rounded, too
A 100-400 RF was a major point that i was hoping would come out soon, but i'm still waiting for a 5D SR replacement in a mirrorless body and a few more RF lenses to come out. I'm pretty impressed with the speed at which they are coming out, but i really want to see some f/4 L lenses (16-35 f/4, 70-200 f/4, or similar to be exact), that are in a better price range than all these 2.8 lenses i see coming out. I'd really like to see the 100-400 be one of the two or three main lenses i take with me backpacking, so i'm hoping the RF version will be lighter and a bit smaller.
I doubt if having f/5.6 throughout the range will make it significantly lighter. The size of the front element is determined by the f/number at the long end, not the short. Narrowing the short f-number won't narrow the diameter of the 400mm f/5.6. f/6.3 at 400mm would shave off significant weight.
Interesting what you say about extenders. More RF kit to buy and more EF kit to lose value.
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Robbing a bank is becoming an almost acceptable option (1,2/50, 1,2/85, 28-70 F2, 100-400 etc...)
Gimme gimme gimme!!!
Gimme gimme gimme!!!
So the big difference is the aperture at "wide":
EF 100-400 4.5 -5.6
RF 100-400 3.5-5.6
and obviously the size and weigth.
I think the general discussion about the long backfocus of tele could not be applied to zoom and different zoom optical designs can take advantage of short backfocus
EF 100-400 4.5 -5.6
RF 100-400 3.5-5.6
and obviously the size and weigth.
I think the general discussion about the long backfocus of tele could not be applied to zoom and different zoom optical designs can take advantage of short backfocus
When I leave my pro gear at home and go out hiking or for a walk in Venice i always put the cheap and compact EF 55 200 "USM" in the bag, the focal length is so "comfortable" on FF
, also great for traveling (compact and very light and cheap, again) and surprisingly fairly good and quick AF for the price.if an RF 50-250 will exist i'll have it for sure when i'll switch to the RF system
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16-35 plus 50-250 would be a pretty tempting two lens kit for me, depending on how the relative IQ of the 24-240 pans out. My current travel kit with 6D is 16-35/4 plus Tamron 28-300. IQ of the Tamron is perhaps surprisingly OK, but still leaves me wanting more.
Do you have either of the extenders? I'm wondering how the lens plus extender plus adapter feels to shoot with.Could be a great lens; I already like the 100-400 II adapted better on the R than on my 5D IV
Don't get too excited by the aperture at the wide end until we see the drop-off with increasing focal length. The recent EF 70-300 IS II only has 7mm of length at its widest aperture before it starts closing-down, a bit of a con really but enough to get f/4.0 into the name.
The EF 100-400 II makes it as far as 130mm before closing-down to f/5.0 and doesn't hit f/5.6 until 300mm.
Yeah the 1.4 extender but I don't use that with the 100-400 anymore; in that case I grab the 500. I know that on the R, the 500 plus extender performs well.
In the past I've shot the 100-400 with extender and that works ok, although slightly stopping down is a requirement. You're talking about f/9 then or even further.
Caveat: I'm not an engineer. As I understand it, from reading what Canon's engineers (white papers) released about the new RF lenses. They are able to redesign lenses utilizing gains from the larger mount coupled with the shortened flange distance. I would think the R lenses could/can be a little shorter than their EF counterparts. The other gain, as seen in the other post concerning the proposed/rumored RF 100-400mm f3.5-5.6L IS... note the f3.5 that's a 2/3-stop gain at 100mm over the EF Mark II version (f4.5 compared to f3.5). Because of the larger diameter it sounds like the engineers can correct for certain lens aberrations that are inherent when passing light (different colors of the spectrum) thru the various elements in a given lens... It will be fun to see what Canon comes up with and if there are any design changes to some of the "consumer" lenses that make them better performers than their EF counterparts.
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Once to market, it will be interesting to see at which focal lengths the max aperture changes - I suspect there may be some gains there too. (As in the max aperture holds a little bit longer as one zooms the lens towards the long end. We shall see.
The performance of the lens at 560mm depends on both the extender and the lens. I have had 3 1.4xTCs and 3 100-400mm IIs. My present ones pair really well and are excellent wide open.