Canon EOS R7 pre-sales discussion, hypothesizing, and prognosticating

C Scott IV wrote in post #19407816
I miss the push-pull too. At one time my main lenses were the 28-300L and 100-400L v1, which both have it. Now I'm always turning the zoom ring the same way. I think the 100-400L II can be used as push-pull though. I may have to try it.

I've always thought that someone should make a TC that has as low a magnification as can be made to work with minimal aberration, for lenses that change volume when you zoom, to keep dust from blowing onto the sensor. For RF->EF adapters, it should be possible to just put in a high-quality coated-glass barrier.

C Scott IV wrote in post #19407816
I miss the push-pull too. At one time my main lenses were the 28-300L and 100-400L v1, which both have it. Now I'm always turning the zoom ring the same way. I think the 100-400L II can be used as push-pull though. I may have to try it.

100-400 Mk ii most definitely can be used as push pull.

C Scott IV wrote in post #19407816
I miss the push-pull too. At one time my main lenses were the 28-300L and 100-400L v1, which both have it. Now I'm always turning the zoom ring the same way. I think the 100-400L II can be used as push-pull though. I may have to try it.

I agree with you about the push pull on the 100-400. It's easier and faster to zoom in and out than twisting a dial. Never really understood the hate it received for this feature. I didn't know the mk2 allowed you to do both

rndman wrote in post #19407665
That's not the future.
Future is when your camera gets up at 5AM, attaches an appropriate lens and TC to itself, goes to a birding place and returns before noon with tack sharp photos and uploads them for post processing to an AI powered machine, that then throws the final ones onto your screen at the dining room wall when you are having your lunch for that day.

And the photographer gets credit for programming the camera, lol. The night before.

graham121 wrote in post #19407819
100-400 Mk ii most definitely can be used as push pull.

"Can be used as" and actual push pull remain a very very different experience. No mileage variation applicable.

The old 100-400 allowed instant framing changes in a way that no twist zooms can replicate. If I was more full time photographer, I swear I would have torn down the mkii and made it push pull somehow.

graham121 wrote in post #19407819
100-400 Mk ii most definitely can be used as push pull.

I've noticed that many lenses can be push/pulled even though they have zoom rings. I just wonder if that doesn't wear out the gearing faster, though, as the stresses are not the same as using the ring.

I may be wrong but I would think doing push pull on a zoom ring lens isn't the best for maximizing its lifespan

John Sheehy wrote in post #19407817
I've always thought that someone should make a TC that has as low a magnification as can be made to work with minimal aberration, for lenses that change volume when you zoom, to keep dust from blowing onto the sensor. For RF->EF adapters, it should be possible to just put in a high-quality coated-glass barrier.

Good idea. And the filter version of the RF->EF adapter could be used if there are any coated-glass inserts for it.

CyberDyneSystems wrote in post #19407898
The old 100-400 allowed instant framing changes in a way that no twist zooms can replicate. If I was more full time photographer, I swear I would have torn down the mkii and made it push pull somehow.

couldn't you just grab the end of the lens and push and pull it? that's what i used to do with my sigma 150-500mm...i never twisted it

CyberDyneSystems wrote in post #19407897
"Can be used as" and actual push pull remain a very very different experience. No mileage variation applicable.

John Sheehy wrote in post #19407908
I've noticed that many lenses can be push/pulled even though they have zoom rings. I just wonder if that doesn't wear out the gearing faster, though, as the stresses are not the same as using the ring.

Jeff USN Photog 72-76 wrote in post #19407950
I may be wrong but I would think doing push pull on a zoom ring lens isn't the best for maximizing its lifespan

Have had my 100-400 ii since early 2015 and having been using either twist or push pull to zoom at will throughout the past 7.5 year over tens of thousands of images….just relaying my real world experience.

CyberDyneSystems wrote in post #19407898
The old 100-400 allowed instant framing changes in a way that no twist zooms can replicate. If I was more full time photographer, I swear I would have torn down the mkii and made it push pull somehow.

I think the Sony 200-600 would surprise you if you tried it.
It's internal zoom and like most internal zooms, very little force is needed to zoom.
The zoom ring only rotates 62 degrees. (The EF 100-400II rotates about 100 degrees)
It's very easy, handheld, to use your left thumb (with left hand supporting lens) to zoom the full range.
I can also use index or middle finger.

I can zoom my 100-400II with my thumb but it's difficult. If I try my index finger it's painful (at the knuckle) and then achieving full zoom range becomes a 2 step process.

* Zoom throw: I had typed "about 70 degrees" for the Sony, 62 degrees came from Bryan Carnathan at TDP.
100 degrees for 100-400 II is my estimation, it's easy to see it's more then 90 degrees. It's probably more than 100 degrees.
Googling the Sony will show all kinds of ridiculous claims. eg, 2 inch or 2.5 inch, one half a turn or even the third of a turn which I'm sure I have repeated on these forums.
I only just now decided to see if I could discover the real spec.

Crutchfield is showing the R7 (tele zoom) and R10 (standard and tele zoom) kits as being in stock. Low stock for the R7. Body only is out of stock for both.

DPReview TV reports that EF lens performance is inconsistent
and does not get the best out of R7 autofocus.

https://www.youtube.co​m/watch?v=0Zb0WjQKILY&​t=517s

Radha-krishna wrote in post #19411933
R7 kits arrived to local camera store in Sacramento, ca. They did not get ANY "body only" boxes.

Normally, the kit lenses for the last few generations of Canon releases were decent lenses, not some crap tossed in the box to appease the newbs. One could buy a model that included a kit lens and sell it and fair better than buying just the body. There was always a market for them. I know nothing about the kit lens on the R7 ... is that still the case or is the kit lens paired with the R7 something nobody wants/uses?