R7 vs R6 vs R5 vs R3

Which of course is because extenders multiply errors in the lenses by 1.4 or 2.0. If the lenses have very small faults to begin with, then the result is still very small.

In Swedish we say either teleförlängare or telekonverter. So we use both words. Förlängare can be literally translated as "lengthener", where the correct word would be extender.

But apart from that, yes, I've had good result with my two extenders (1.4X III and 2X III) on my 300 mm.

apersson850 wrote in post #19432137
Which of course is because extenders multiply errors in the lenses by 1.4 or 2.0.

It's so logical, they multiply errors by their extender factor. But is it really so? Why do 1.4 extenders have hardly any effect on sharpness, whereas 2x extenders are often considered to be marginal? If 1.4x are so great, maybe stack two of them to get to 2x instead of using a 2x. And that doesn't make any sense either.

Apart from that, it should be possible to design a teleconverter that improves sharpness, because additional lens elements can do that.

Just buy based on budget.

Archibald wrote in post #19432147
Apart from that, it should be possible to design a teleconverter that improves sharpness, because additional lens elements can do that.

That would have to be in a lens like the EF 200-400 mm f/4L IS USM Extender 1.4X, where the extender can be designed as an integrated part of the host lens.

CyberDyneSystems wrote in post #19403685
I've only just got it, but it'll be my second camera for wildlife. (Often I will shoot two bodies, one with a long prime one with a zoom like the 100-500mm.)

I am considering purchasing the R7 and using it in conjunction with the EF 100-400mkII. Do you happen to have any experience combining the R7 with an EF lens? How is the AF and how do the IBIS and IS work together?

MarcoEos wrote in post #19433149
I am considering purchasing the R7 and using it in conjunction with the EF 100-400mkII. Do you happen to have any experience combining the R7 with an EF lens? How is the AF and how do the IBIS and IS work together?

I use my EF lenses, especially the 100-400Lii a lot. I got the control ring RF to EF adapter but it works with the non control adapter, just wanted more controls.

MarcoEos wrote in post #19433149
I am considering purchasing the R7 and using it in conjunction with the EF 100-400mkII. Do you happen to have any experience combining the R7 with an EF lens? How is the AF and how do the IBIS and IS work together?

I would like to answer this with real in the field experience, but alas when I traveled recently although I packed the 100-400mm, I managed to forget the EF converter.

I can tell you that in tests, the 100-400mm seems to work just as well as it does on the R5, and I love that lens on the R5.

Archibald wrote in post #19432147
It's so logical, they multiply errors by their extender factor. But is it really so? Why do 1.4 extenders have hardly any effect on sharpness, whereas 2x extenders are often considered to be marginal? If 1.4x are so great, maybe stack two of them to get to 2x instead of using a 2x. And that doesn't make any sense either.

Apart from that, it should be possible to design a teleconverter that improves sharpness, because additional lens elements can do that.

Less expensive to get Topaz Sharpen AI (or Photo AI). ONI should soon release their combined NoNoise & Tack Sharp App. Already there in RP 2023. Other competitors will follow soon. With upscaling like Gigapixel combined with cropping do you need a TC these days?

MarcoEos wrote in post #19433149
I am considering purchasing the R7 and using it in conjunction with the EF 100-400mkII. Do you happen to have any experience combining the R7 with an EF lens? How is the AF and how do the IBIS and IS work together?

Are you asking how well they work together or how they work together.

Lot’s of people out there using R bodies with EF lenses. I can’t see R7 tech being any different to prevent smooth operation with that lens.

With R bodies IBIS and IS work together. There is no way to shut either off independently for either EF or RF lenses unless there is something about the R7 I don’t know. To turn stabilization off you shut the lens IS switch off and that shuts both off.

If you have a non stabilized lens then you can access the camera menus to shut IBIS off. This menu is greyed out when a lens with IS is mounted.

With R bodies IS/IBIS runs continually. It runs until the camera times out and goes to sleep (which is about 45 seconds minimum), you power the body off or you shut the IS switch off. The R7 might have added an additional menu for that I’m not aware of. I don’t have one yet but will one day so I’m curious about those few things. I have an R5 and that is how it operates.

My 100-400 II was wonderful on my R which did not have IBIS. I shot successfully with the adaptor and the 2X TC.

digital paradise wrote in post #19434451
Less expensive to get Topaz Sharpen AI (or Photo AI). ONI should soon release their combined NoNoise & Tack Sharp App. Already there in RP 2023. Other competitors will follow soon. With upscaling like Gigapixel combined with cropping do you need a TC these days?

I forgot to say I believe you can't stack EF V3 lenses.

I have the R5, 100-500 and RF 1.4. After shooting for 6 weeks in Portugal this past spring I decided that I didn't really like the TC for BIF. AF takes a slight hit and my keeper rate was better without it. Stills where great.

When I get my R7 I doubt I'll use the TC for BIF. With the crop factor that will put me at 800mm without a TC. That is getting up there for tracking birds. I'm sure looking towards static subjects with my TC. 1120mm.

I once put my R in crop mode, had my 400 DO II and 2X TC. That was 1280mm. Even stills were tough but the R does not have IBIS. Just had lens IS.

digital paradise wrote in post #19434451
Less expensive to get Topaz Sharpen AI (or Photo AI). ONI should soon release their combined NoNoise & Tack Sharp App. Already there in RP 2023. Other competitors will follow soon. With upscaling like Gigapixel combined with cropping do you need a TC these days?

Good question, not sure about the answer, but for now I think working without a tele extender is a good plan.

Archibald wrote in post #19434474
Good question, not sure about the answer, but for now I think working without a tele extender is a good plan.

I’ve seen a few of your crops.

digital paradise wrote in post #19434480
I’ve seen a few of your crops.

Lol, I crop every shot. And some are pretty severely.

Archibald wrote in post #19434484
Lol, I crop every shot. And some are pretty severely.

Those were the ones that came to mind.