Canon RF 1200mm Details Leak: Weighs only 0.25kg more than the RF 600mm f/4L IS USM
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Asobinet (like digicam-info) has some more details and speculates that the new RF 800mm could "be a lens equipped with a specially designed magnifying optical system on the RF400mm F2.8 L IS USM"? Could make sense with the "metalic tube" at mount on both lenses?:
asobinet.com
translation: https://asobinet-com.translate.goog...r_sl=ja&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=nui
RF1200mm F8 L IS USMはRF600mm F4と拡大光学系を組み合わせている？
大型掲示板にキヤノンの新しいRFレンズ「RF1200mm F8 L IS USM」のプレスリリースと思われるP…
asobinet.com
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"Doing the math, this means that a human head would completely fill the frame at MFD"
My new portrait lens!
My new portrait lens!
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This is truly amazing. I'll go to sleep and dream.
Jack
Sorry but I see it as much more exciting than that.
Jack
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It says it uses the same “front section optical design as the 600mm f/4”. I’m sure we will find out that the 800mm uses the front section of the 400mm f/2.8. It even looks like it if you look at the photos. They seem to have stuck some sort of magnifying tube/2x TC onto both of them.
Im intrigued. But it does seem like a pair of niche lenses. They will have to be a lot sharper than their original 400/600 + TC combinations for anyone to want to give up that focal length flexibility. Are there really that many people complaining about the iq of the 600mm + 2x TC? You are really fighting atmospheric issues at that focal length anyway, unless you are shooting small birds at a short distance.
I can’t wait for someone to perform some comparative tests!
Im intrigued. But it does seem like a pair of niche lenses. They will have to be a lot sharper than their original 400/600 + TC combinations for anyone to want to give up that focal length flexibility. Are there really that many people complaining about the iq of the 600mm + 2x TC? You are really fighting atmospheric issues at that focal length anyway, unless you are shooting small birds at a short distance.
I can’t wait for someone to perform some comparative tests!
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OK, but I'm a Canonite and presently do most of my shots at 800, although F8, as is. I'd be more interested in the 800 if it's light but can't afford it anyway. That's why I dream.
Jack
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A compact DO lens would have been more interesting to me. That's all I'm saying. I have no doubt they will be stellar optics regardless.OK, but I'm a Canonite and presently do most of my shots at 800, although F8, as is. I'd be more interested in the 800 if it's light but can't afford it anyway. That's why I dream.
Jack
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With custom "magnifier design" specifically made for the lens(es), the optical result should be (hopefully considerable?) better then using a "generic" 2x extender on the lens(es).
But I'm sure we will be seeing lots of practical comparisons telling us more about that...
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1) It would not be as sharp
2) Anyone who can afford the RF 1200 f/8 probably already has the other two
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My spidey sense got tingly too. That's why I went and looked up the 600mm optical design. The elements list show it's not just a TC glued onto the RF 600. Had Canon considered doing that, I don't think they'd expect to sell many, as there doesn't seem to be a downside to just carrying the 2x TC with the 600. I'm betting there's something more useful than an extended 600 to this.
We'll just have to wait for 1) the full press release to come out, 2) Canon's chosen people to give reviews where they don't directly compare image quality between this and Canon's other big whites, and then 3) wait for the supply chain to unkink enough so that some of the forum dwellers are able to get some actual time with it. So, in other words, June
.
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There would be no reason to ever do that.My spidey sense got tingly too. That's why I went and looked up the 600mm optical design. The elements list show it's not just a TC glued onto the RF 600. Had Canon considered doing that, I don't think they'd expect to sell many, as there doesn't seem to be a downside to just carrying the 2x TC with the 600. I'm betting there's something more useful than an extended 600 to this.
We'll just have to wait for 1) the full press release to come out, 2) Canon's chosen people to give reviews where they don't directly compare image quality between this and Canon's other big whites, and then 3) wait for the supply chain to unkink enough so that some of the forum dwellers are able to get some actual time with it. So, in other words, June
It would make more sense for them so sell a 600 with a built-in 2x teleconverter unless people would be dumb enough to pay more for a 1200 f/8 that is no better than a 600 f/4 with a 2x teleconverter.
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I would hope that a built-in, non-removable 2x TC that is designed for that specific lens would give better image quality than using the external, 'generic' 2x TC.
Having said that, I don't know how much improvement you could get when doing that and this is more about having fewer moving parts on a huge, heavy lens.
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At 7.4lbs or 3.36kg the RF 1200mm worth the upgrade.
EF 800mm is 4.5kg or 9.9lbs.
Will it cost below $17,000?
EF 800mm is 4.5kg or 9.9lbs.
Will it cost below $17,000?
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When you mount a TC on a lens, aperture diffraction doesn't change for a given aperture size, the light loss is not caused by a smaller size of the diaphragm hole. Just like it doesn't change if you mount an ND filter. Then there are the TC own effects, and it can't create resolution where it does not exist.
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for portraits with eyes widened in fright, because the look in the dark mouth of this huge white bazooka
now, for birders, they will have to decide whether they go for a 600mm f/4 plus 2x TC to be a bit more flexible or get the new 800mm. It'll also depend how well the latter one will work with TCs to get even more reach (and often catch more details of atmospheric blur
)
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