Canon RF 300-600mm f/5.6L IS USM: What to Expect and When It Might Land

I really don't see the point in Canon releasing a 300-600 mm f5.6 lens especially since that with the RF 100-300 mm f2.8 x 2x TC I get a greater focal range at the same f-stop. Yes, I would expect the 300-600 mm f5.6 to be sharper, but I have shot a lot with the RF 100-300 mm f2.8 + 2x TC and the results are very good.

IMO Canon should have made a RF 300-700 mm f4-f6.3 lens. That I would have purchased. The RF 300-600 mm f5.6 I just don't see buying unless they make it significantly lighter than the RF 100-300 f2.8+ 2x TC. Missing the 200-500 mm f4 is a bit of a disappointment.
 
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When I put the RF 2x behind my RF 100-300/2.8, I get a 200-600mm f/5.6 so for me, not much interest in this lens. That combo is $10K, which is where I'd expect this lens to come (and that's not factoring in US price increases from tariffs).

Hoping for a new 600/4 with a built-in

When I put the RF 2x behind my RF 100-300/2.8, I get a 200-600mm f/5.6 so for me, not much interest in this lens. That combo is $10K, which is where I'd expect this lens to come (and that's not factoring in US price increases from tariffs).

Hoping for a new 600/4 with a built-in 1.4x TC.
How disappointing, unbelievable, yea only recourse now for good canon lens is to wait for the new RF 400 and 600, hopefully they get released in first Q of 2026. Its really disappointing that folks reported the 200-500 in the field, what a bait and click joke
 
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stupid move from Canon. 300-600mm f5.6 is not the same as 300-600mmf4.
Many pro would be disappointed f5.6. They don't care the weight 300-600mmf4.
many people in here say 100-300 f2.8 + 2x which is not bad.
or Canon should make 300-500f4 and build in 1.4x
the range 300-500 is f5.6 looks so bad for pro
 
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I have a problem with the constant push to raise prices and slow down aperture speeds. Personally, I would prefer a simple and fairly light prime with a built in TC. But, if I'm honest, with the expected 24% Japanese tariff, there is no way I would throw away as much as $2000 just to import it. Truthfully, there is a high likelihood that the purchase of any new Canon gear will be nuked by the politicians.
 
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The EF 200-400 adapts incredibly well, and has become incredibly affordable. While a newer generation with lighter materials and an overall smaller package would have surely been welcomed, there does not appear to be a new lens with the same versatility in the near future.
 
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I guess Canon is still selling more cameras and glass than the competition. Maybe if sales begin to slide, Canon will decide to step up to the plate. I was hoping for a 200-500 f4 L lens. Canon is too slow to react. If it weren't for the great customer support, I'd have jumped ship.
 
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If the 200 - 500 F4 was truely put on the back burners I’m really courious to find out what drove them to think this F5.6 was a better direction to go in. IMO canons niche has always been their lower F stop bleeding edge lens concepts, IMO this release is really going to be a litmus test for the future of their lens, oh well time will tell.
 
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I guess Canon is still selling more cameras and glass than the competition. Maybe if sales begin to slide, Canon will decide to step up to the plate. I was hoping for a 200-500 f4 L lens. Canon is too slow to react. If it weren't for the great customer support, I'd have jumped ship.
I really would not count on an expensive supertelephoto lens to impact Canon's market share. If sales begin to slide, they'll do things like lowering prices, expanding the selection of less expensive products, etc. Which sounds a lot like what they've been doing recently.
 
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I wouldn't pay more then 3k€ for this f5,6!! really guys!
I m hardly thinking about to switch to Nikon to have and use Canon EF, Sony E and Nikon Z!!! all in one system!!! this is the way! Not this shitty high priced or missing lenses what Canon is doing!

Canon is doomed in the tele area! There are soooo many great and "cheap" lenses - but not in the Canon section! You have to pay 500-3k€ or >12k€
 
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I wouldn't pay more then 3k€ for this f5,6!! really guys!
I m hardly thinking about to switch to Nikon to have and use Canon EF, Sony E and Nikon Z!!! all in one system!!! this is the way! Not this shitty high priced or missing lenses what Canon is doing!

Canon is doomed in the tele area! There are soooo many great and "cheap" lenses - but not in the Canon section! You have to pay 500-3k€ or >12k€
Nikon's 600mm f/6,3 (!!!) is 5200 EUR.
Really?
 
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Nikon's 600mm f/6,3 (!!!) is 5200 EUR.
Really?
Canon is always Doomed no matter what. Before full frame mirrorless they were doomed. then it was no rf mount apsc. Then it was no third party autofocus. now it's ohh the new super tele zoom is going to be too expensive and it's just a rumor. Doomed...
 
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Canon is doomed in the tele area! There are soooo many great and "cheap" lenses - but not in the Canon section! You have to pay 500-3k€ or >12k€
Nikon’s PF supertele Z lenses have been out for 7 years now. You can see the effect of that by the huge increase of Nikon’s market share…but you have to really squint and probably some psychedelics would help.

I have no doubt that Canon’s RF 600/11 and 800/11 sell far better than all manufacturers’ fast and fast-ish supertele lenses combined.
 
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I really don't see the point in Canon releasing a 300-600 mm f5.6 lens especially since that with the RF 100-300 mm f2.8 x 2x TC I get a greater focal range at the same f-stop. Yes, I would expect the 300-600 mm f5.6 to be sharper, but I have shot a lot with the RF 100-300 mm f2.8 + 2x TC and the results are very good.

IMO Canon should have made a RF 300-700 mm f4-f6.3 lens. That I would have purchased. The RF 300-600 mm f5.6 I just don't see buying unless they make it significantly lighter than the RF 100-300 f2.8+ 2x TC. Missing the 200-500 mm f4 is a bit of a disappointment.
Not singling you out in particular but a few people have said why bother when you can put a TC on the 100-300, but as I mentioned above, you can add one to this lens and go longer. From a bird photography perspectives, 600 isn't all that long. And you can't stack RF TCs, so for me the 100-300 would be of little use (though I still covet it).
 
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Not singling you out in particular but a few people have said why bother when you can put a TC on the 100-300, but as I mentioned above, you can add one to this lens and go longer. From a bird photography perspectives, 600 isn't all that long. And you can't stack RF TCs, so for me the 100-300 would be of little use (though I still covet it).
Agree that with the RF 100-300 f2.8 the maximum focal length is 200-600 mm f5.6. My concern with the 300-600 mm f5.6 is that adding a 1.4x TC gives you a 420-840 mm f8 lens. Sony just released a 400-800 f6.3-f8 lens for 3K USD and I think Canon is going to struggle to hit this price point against their competition. Lastly, at least for me f8 is awfully dark.

With that said, I might be interested in this lens if the price is decent and it is significantly lighter than the RF 100-300 mm + 2 TC.
 
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Not singling you out in particular but a few people have said why bother when you can put a TC on the 100-300, but as I mentioned above, you can add one to this lens and go longer. From a bird photography perspectives, 600 isn't all that long.
That certainly occurred to me (as one who said why bother because of the 100-300 + 2x), but for birds I’m using the 600/4 + 1.4x anyway.
 
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