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Archive 2022 · Stacking Extenders on RF Lenses

nmerc_photos
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p.1 #1 · p.1 #1 · Stacking Extenders on RF Lenses

Hello All,

Apologies if this topic has already been brought up. I did several searches on Facebook, Google, and FredMiranda and wasn't able to find anything.

I have successfully been able to stack extenders on the:

RF 800 F11
RF 100-500 F4.5 - 7.1

but cannot get it to work on the RF 600 F4

just wondering if anyone has any ideas why that might be, or things to try differently.

my interest is especially peaked now, because the newly released RF 1200 F8 appears to just be an RF 600 F4 with an internal 2x.

I suppose Canon must have better technology and knowledge to make it work, but now that it seems it is possible... I'd love to be able to stack extenders on the 600mm f4

Any thoughts or feedback are appreciated.

Edited on Feb 28, 2022 at 08:55 AM · View previous versions

Feb 25, 2022 at 12:09 PM

nmerc_photos
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p.1 #2 · p.1 #2 · Stacking Extenders on RF Lenses

So I got to to thinking, and wondered if order matters.. and it does! if I stack the R5 + 1.4x + 2x + 600 in that order, it works. If I try R5 + 2x + 1.4x + 600, it does not.

Feb 25, 2022 at 12:41 PM

drimer
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p.1 #3 · p.1 #3 · Stacking Extenders on RF Lenses

How well does it work?

nmerc_photos wrote:
So I got to to thinking, and wondered if order matters.. and it does! if I stack the R5 + 1.4x + 2x + 600 in that order, it works. If I try R5 + 2x + 1.4x + 600, it does not.

Feb 25, 2022 at 01:10 PM

stanj
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p.1 #4 · p.1 #4 · Stacking Extenders on RF Lenses

nmerc_photos wrote:
I have successfully been able to stack extenders on the:

RF 800 F11

Yeah but as pictured your lens is not in the shooting position, so I don't think you will actually be able to take any photos like so

Feb 25, 2022 at 01:14 PM

nmerc_photos
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p.1 #5 · p.1 #5 · Stacking Extenders on RF Lenses

drimer wrote:
How well does it work?

I haven't tried the 600 with stacked extenders yet. I'll need to find some place with subjects far away enough haha.

My main plan will be Yellowstone in May. Not sure if I'll find something before that

I expect it'll work slightly better than the EF 600 III + stacked extenders, which has historically resulted in great images

Feb 25, 2022 at 01:25 PM

Snowfella
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p.1 #6 · p.1 #6 · Stacking Extenders on RF Lenses

Non related to lenses and extenders.
I might be paranoid but always think it's a good idea to sanitize the GPS information from shots like this. Your phone GPS in this situation looks like it's accurate down to a few yards.

Feb 28, 2022 at 12:58 AM

nmerc_photos
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p.1 #7 · p.1 #7 · Stacking Extenders on RF Lenses

Snowfella wrote:
Non related to lenses and extenders.
I might be paranoid but always think it's a good idea to sanitize the GPS information from shots like this. Your phone GPS in this situation looks like it's accurate down to a few yards.

well that is scary. I had no idea people could pull GPS coordinates from photos.

thanks

Feb 28, 2022 at 09:02 AM

Snowfella
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p.1 #8 · p.1 #8 · Stacking Extenders on RF Lenses

I use an addon to Google Chrome called "EXIF viewer", if an image has exif information still attached (including GPS information) all I need to do is hover the mouse over it to see the info. If there's GPS data included it will give a clickable button that opens Google Maps showing the captured location.

Feb 28, 2022 at 04:21 PM

nmerc_photos
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p.1 #9 · p.1 #9 · Stacking Extenders on RF Lenses

bumping this up with new information.

I don't know what I was talking about back in Feb when I mentioned extender stacking working on the RF 600, because it does, but not fully.

When you stack extenders on the 600, you lose infinity focus which makes it pretty much useless. you can shoot close up subjects, but not far away.

I now have the RF 800 5.6 which is supposedly just the RF 400 f2.8 with an internal 2x, and this lens works perfectly with full AF and infinity focus.

so I'm stumped

Jan 23, 2023 at 02:30 PM

J.K.T.
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p.1 #10 · p.1 #10 · Stacking Extenders on RF Lenses

Well it can have an extender construction inside, but it is not the same extender design RF 2x has. It COULD BE related to EF 2x III.

Why did I bring up the EF extender? That's because the way to stack extenders is to use EF lens, EF extender and RF extender. Optically it works well, but the EXIF looses the second extender and the IBIS won't work at full efficiency as it doesn't see the correct focal length. With long teles that likely won't matter much, though.

Jan 24, 2023 at 01:32 AM

nmerc_photos
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p.1 #11 · p.1 #11 · Stacking Extenders on RF Lenses

J.K.T. wrote:
Well it can have an extender construction inside, but it is not the same extender design RF 2x has. It COULD BE related to EF 2x III.

Why did I bring up the EF extender? That's because the way to stack extenders is to use EF lens, EF extender and RF extender. Optically it works well, but the EXIF looses the second extender and the IBIS won't work at full efficiency as it doesn't see the correct focal length. With long teles that likely won't matter much, though.

I hadn't considered the possibility that they were using the EF extender inside. Initially that seemed lack it would be a step backwards for progress.

Definitely a good possibility though.

Jan 24, 2023 at 11:50 AM


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