Conundrum: Canon R7 + RF / EF adaptor + 1.4x Mk 3 extender + EF 100-400 II - will it work?

OMattB

OMattB

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Matt Brookes
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The 100-500mm RF looks great but is too expensive for me at the moment

So does anyone have any experience using the Canon R7 with an EF/RF adaptor plus the Canon 1.4x Mk 3 extender and the Canon EF 100-400mm MkII.

I mainly shoot birds and was wondering if buying the 1.4 xtender was worthwhile?
 
My experience is that the R series don't suffer from lack of AF with a TC (like the DSLR versions do) - you might find getting initial focus slower than you would like but generally once it's locked on it stays locked on - at least for BIF.

Birds on the ground against challenging backgrounds - tougher going.
 
As Jason says ^^, AF should work fine with a TC on a mirrorless body. I used a similar combination a while ago, a Canon M5, a Mk1 100-400 and the 2xTC mkiii. It worked fine on the M5, although the loss in light was too big an issue for me with the 2x, that TC is more suited to the big primes IMO.

Having never used your suggested combination though (although I do have an R7), I can't say for definate that it will all work and physically fit together but I would go as far as to say it should.

Just bear in mind that when you use a TC, there will be compromises and caveats involved.
 
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hunnymonster said:
My experience is that the R series don't suffer from lack of AF with a TC (like the DSLR versions do) - you might find getting initial focus slower than you would like but generally once it's locked on it stays locked on - at least for BIF.

Birds on the ground against challenging backgrounds - tougher going.
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Thank you hunnymonster !
 
Dale. said:
As Jason says ^^, AF should work fine with a TC on a mirrorless body. I used a similar combination a while ago, a Canon M5, a Mk1 100-400 and the 2xTC mkiii. It worked fine on the M5, although the loss in light was too big an issue for me with the 2x, that TC is more suited to the big primes IMO.

Having never used your suggested combination though (although I do have an R7), I can't say for definate that it will all work and physically fit together but I would go as far as to say it should.

Just bear in mind that when you use a TC, there will be compromises and caveats involved.
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Thank you Dale, understand the caveats and compromises but reckon I will give it a go can always sell 1.4x if I don't get on with it. Better that than selling loads of gear to buy a 100-500 RF :)
 
I'm out with my R6mk2, 2x Mk2 & 100-400 Mk2... It's 2120, sun is not bright (I am in Scotland after all)...signal-2023-06-06-20-58-05-502.jpg
 
OMattB said:
The 100-500mm RF looks great but is too expensive for me at the moment

So does anyone have any experience using the Canon R7 with an EF/RF adaptor plus the Canon 1.4x Mk 3 extender and the Canon EF 100-400mm MkII.

I mainly shoot birds and was wondering if buying the 1.4 xtender was worthwhile?
Click to expand...
I have been using the combination you mention, Everything works just fine but I will have to go and look for some images.

I get the feeling that 32mp on a crop body is getting a bit too much for IQ of this combo (100-400and 1.4x), without the 1.4X images are super sharp if shooting in good conditions with high enough shutter speed or a good support.

The 100-400 and 1.4x on the R7 is almost 900mm so not going to yield good images if not treated carefully

I'll be back with some images

D
 
ER7_0412_1000-2.jpg
ER7_0412_1000-3.jpg
ER7_4213_1000.jpg
ER7_4213_1000-2.jpg
ER7_4275_1000-full-frame.jpg
ER7_4275_1000.jpg
 
ER7_4304_1000.jpgER7_4304_1000-2.jpg
 
All these were taken on an R7 with 100-400Lmk2 and 1.4x ver 3 convertor, and for various reasons were taken at what I would consider to be "low" shutter speeds so even the combination of IBS and lens IS seems to work ok in these situations.

They have all had minimal processing, just a bit of highlight adjustment and a tiny teak of clarity and dehaze.

Any more questions just fire away :)

HTH

D

One more pair of images, not something I thought I'd be showing in public but shot at higher shutter speed than the othersER7_5167_1000.jpgER7_5167_1000-2.jpg
 
My main concern with 1.4x on 100-400 would be the loss of light I feel f8 is too dark for this country and it's weather.
Even the 100-500mm isn't ideal at f7.1 IMO.

Have you considered adapting something like sigma 150-600mm.
 
I often shoot motorsport with the 100-500 @ 500 F7.1 with a CPL on (rallys, so darkish conditions often). I've not had any problems by cranking the ISO up on my R5. might be different with the Crop sensor R7 though... However just wanted to point out that I haven't felt limited by the 7.1 unless i am in the trees on a dark/wet day, even then the images were ok.

This was 500mm, F7.1, 1/250s, ISO2500 - as you can see, I could probably have ramped the ISO up even more.
5G4A0202-Edit.jpg

Bit more of an extreme example - you can still see the detail and still sharp despite the conditions.

500mm, F7.1, 1/400, ISO3200

5G4A2952.jpg
 
edit: the upload seems to have really "crapped up" that last image, here it is without the comrpession

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A_S said:
I often shoot motorsport with the 100-500 @ 500 F7.1 with a CPL on (rallys, so darkish conditions often). I've not had any problems by cranking the ISO up on my R5. might be different with the Crop sensor R7 though... However just wanted to point out that I haven't felt limited by the 7.1 unless i am in the trees on a dark/wet day, even then the images were ok.

This was 500mm, F7.1, 1/250s, ISO2500 - as you can see, I could probably have ramped the ISO up even more.
View attachment 391859

Bit more of an extreme example - you can still see the detail and still sharp despite the conditions.

500mm, F7.1, 1/400, ISO3200

View attachment 391860
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You pictures actually perfectly make my point ;)
You are shooting at 1/250s and 1/400s in yours examples and your ISO is already pretty high.
For birds you'll need high shutter speeds to freeze them, not to mention they are a lot of times in the shade too (i.e. like your darkish conditions).
1/1000s kinda my starting point.
Yes I have shot birds at lower shutter speeds too but its not always going to work.
 
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nandbytes said:
You pictures actually perfectly make my point ;)
You are shooting at 1/250s and 1/400s in yours examples and your ISO is already pretty high.
For birds you'll need high shutter speeds to freeze them, not to mention they are a lot of times in the shade too (i.e. like your darkish conditions).
1/1000s kinda my starting point.
Yes I have shot birds at lower shutter speeds too but its not always going to work.
Click to expand...
Agreed I never shoot birds under 1/1000th unless they are static!
 
nandbytes said:
My main concern with 1.4x on 100-400 would be the loss of light I feel f8 is too dark for this country and it's weather.
Even the 100-500mm isn't ideal at f7.1 IMO.

Have you considered adapting something like sigma 150-600mm.
Click to expand...
Yes I have a 150-600 C but haven't used it too much on my R7 - think I need to use it a bit more. My 100-400 is always on and I've kind of forgotten about my Siggy :facepalm:
 
Thank you all for your responses, very useful. My plan is now to

1) Use my Sigma 150-600mm more - only used it a couple of times on my R7 and while some people mention focusing issues I haven't had any yet
2) Hire a 1.4x Extender from Lenslab for £18 for 3 days and see how I get on with it on my 100-400 II
3) Ignore the temptation to get rid of all my long EF lenses (100-400mm II / Sigma 150-600 C / 400 f5.6) in exchange for a RF 100-500mm
 
OMattB said:
Thank you all for your responses, very useful. My plan is now to

1) Use my Sigma 150-600mm more - only used it a couple of times on my R7 and while some people mention focusing issues I haven't had any yet
2) Hire a 1.4x Extender from Lenslab for £18 for 3 days and see how I get on with it on my 100-400 II
3) Ignore the temptation to get rid of all my long EF lenses (100-400mm II / Sigma 150-600 C / 400 f5.6) in exchange for a RF 100-500mm
Click to expand...

I don't know how much your glass is worth in total but if you can exchange your long EF glass for 400mm f4 DOii + 1.4x, that would be my suggestion to you.
in future you can add a 70-300mm or a 70-200mm f4 is you are really missing the "wider" ends. They can be had at fairly low prices if bought used.
 
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