topic Re: Canon EOS R10 or (used) EOS 5D Mark IV in EOS DSLR & Mirrorless Cameras

Canon EOS R10 or (used) EOS 5D Mark IV

kalanfuga — Fri, 08 May 2026 05:51:20 GMT

Hi everyone,

I’m considering upgrading my old Canon EOS 750D setup and would really appreciate some advice.

Right now I’m torn between the Canon EOS R10 and a used Canon EOS 5D Mark IV with a fairly low shutter count (under 30,000). Both options are available at roughly the same price.

I mainly shoot nature and wildlife photography, especially birds, along with the occasional family event and vacations. I haven’t explored video much yet, though I might in the future with the right setup, so video performance isn’t my top priority.

Which option would you recommend for my use case, and why?

Thanks in advance!

Re: Canon EOS R10 or (used) EOS 5D Mark IV

p4pictures — Fri, 08 May 2026 08:56:24 GMT

Firstly let me say I have the EOS R10 and previously owned the EOS 5D Mark IV so I feel I have some background to this.

EOS 5D Mark IV

The best general purpose DSLR camera that Canon will ever make
30MP stills, great for most needs
Full-frame sensor
Capable AF when well setup for the subject being photographed
Dual card slots - 1x CF card, 1x SD card
4K video - crop mode only
EF lenses only can be used, not EF-S or RF. No more EF lenses will be introduced
Larger and heavier than EOS 750D
Uses LP-E6 type batteries, greater battery life

EOS R10

Entry / mid-range camera in the R-series, based n EOS R7
24MP stills, enough for many needs
Intelligent AF for easier tracking of moving or potentially moving subjects
Single SD card slot, supports faster UHS-II cards
4K video using full sensor, plus 4K 50/60 fps with additional crop
EF / EF-S / RF / RF-S lenses can be used - use your existing lenses with adapter and then transition to RF / RF-S versions. RF-S 18-150mm kit lens is a great all-purpose choice
Smaller and lighter than EOS 750D
Uses same LP-E17 batteries as EOS 750D, similar battery life too

Personally I would go for the EOS R10 at this point in time. It gets you in to the R-series models, works with your existing lenses via the EF to RF mount adapter and offers more capability and features than your current camera.

Re: Canon EOS R10 or (used) EOS 5D Mark IV

SignifDigits — Fri, 08 May 2026 10:23:47 GMT

My colleague is the expert here, but I would agree and add the R10 for the following reasons in your use case:

Although you're giving up pixels, the APS-C sensor give you an effective 1.6x boost in focal length. More real image on the sensor is better than cropping every time.
Mirrorless is great. What you see really is what you get.
Electronic and silent shutter is super nice to have when shooting family
7frames per second vs 15 fps on the R10 means the R10 wins here - you EF lenses may or may not be able to fully support this, but if they do this really helps with birds and wildlife
You're futureproofing by moving to mirrorless and RF lenses over time

Re: Canon EOS R10 or (used) EOS 5D Mark IV

jrhoffman75 — Fri, 08 May 2026 15:42:37 GMT

Agree with both previous responses. The autofocus systems on the RF bodies is just short of magic. That will be a great benefit for birds/wildlife.

Re: Canon EOS R10 or (used) EOS 5D Mark IV

wq9nsc — Fri, 08 May 2026 16:18:18 GMT

One additional consideration point is whether weather sealing is important to you because the 5D IV is much more robust in that sense. So it depends where your nature photography takes you and how much care you need to take when photographing.

This is a concern with entry level in pretty much any of the genres/platforms but it is something to consider for the outdoor photographer.

Rodger

Re: Canon EOS R10 or (used) EOS 5D Mark IV

LeeP — Fri, 08 May 2026 17:06:59 GMT

I began using Canons in 1998 when continuing with Pentax was untenable due to their horrific slide in quality and reliability. Canon has been a joyride since.

My first mirrorless camera was the R100 3 years ago. I had a bunch of EF lenses, so my plan was NOT to buy RF lenses, but to just use the converter. That changed and the only Canon EF lens I have now is a 28-135 IS zoom.

The EVF was a wild improvement for me, game-changing in fact. I quickly added an R8. My satisfaction was such that I wondered why I had not jumped to Canon's mirrorless cameras sooner.

I have no experience with the R10, but I would highly recommend buying modern--i.e. mirrorless--rather than a used DSLR with the clock ticking on Canon support. Yes, all cameras lose service support over time, but the R10's clock isn't ticking yet, thus longer service support time.

The EVF for me makes it such that if I'm looking through an optical viewfinder it had better be a 35mm SLR.

Re: Canon EOS R10 or (used) EOS 5D Mark IV

Waddizzle — Fri, 08 May 2026 17:15:06 GMT

Back when the 5D4 was first released I couldn’t decide which body I wanted to upgrade from a 6D.

I was choosing between the 6D2 and the 5D4. I was all aboard with 5D4 until I noticed that it had NFC communication, while the 6D2 used Bluetooth.

That settled it for me. A Bluetooth enabled camera is a better choice over one that’s not.

Now what about the sensors. I would choose full frame all day long. The R8 is a better choice than the R10, IMHO.

Re: Canon EOS R10 or (used) EOS 5D Mark IV

stevet1 — Fri, 08 May 2026 19:24:05 GMT

kalanfuga,

Two things that Brian sort of alluded to:

1) The 5D Mark IV is going to be bigger and heavier than the R10. 890 grams for the 5D vs. 429 grams for the R10 (with battery and card).

That's almost twice as heavy. These days, weight is an important consideration for me. Holding that much weight up to my face for a long period of time simply isn't enjoyable anymore.

2) Because of the R10's light weight, longer, heavier lenses (which you might be using in your birding shots) make the camera/lens combination front heavy, and you have to be careful not to let your front drop and you lose focus. When you take pictures, especially handheld, you have to really support your lens.

Lastly, I would go with the R10 because that's what I'm saving up for 😃

Steve Thomas