EOS C80 Questions: Frame rate, card recos, best mount setup for heavy lenses

[Thefilmaddict]

Thanks for letting me join. I was wonderring about two things about the C80:

1. Can this camera record 60 and 120 fps in 4k? And will a v90 card that’s 300 mbs be able to handle those frame rates? I don’t see faster cards.

2. With the 24-105 rf 2.8 zoom at 3 pounds I believe, can it just be attached to the camera at all times and be supported that way or does it need a rail system that can help support the weight of the lens? I ask because I’ve read that the lens has a tripod support part.

Thanks!

[AtticusLake]

Hi,

---

1. Can this camera record 60 and 120 fps in 4k?

Yes.  You would use the Slow&Fast mode, and there is no audio.  You would be shooting in a Long GOP mode, either AVC or HEVC.  Your shooting bit rate will be up to 650 Mb/s, which is up to 81 MB/s.   ("M" is mega, i.e. a million; "b" is bits; "B" is bytes, which is 8 bits.)

You will find this in the manual, on page 112; but note that the manual quotes the playback bit rates, not the recording bit rates, which is what you are concerned about.

---

And will a v90 card that’s 300 mbs be able to handle those frame rates? I don’t see faster cards.

There is no such thing as a "v90 card that’s 300 mbs".  A v90 card is, by definition, rated at 90 MB/s -- mega bytes per second, which is 720 Mb/s -- mega bits per second -- for guaranteed, sustained minimum write speed, which is all we care about for video shooting.  The speed numbers printed on the card are marketing garbage -- they represent the best-cast instantaneous speed, which is useless for video.

v90 cards are the fastest SD cards currently available, and since the C80 records to SD cards, you can safely assume that v90 cards can capture anything the C80 can capture.  In fact, as I already said, for 120 FPS the speeds go up to 650 Mb/s, which is up to 81 MB/s, which is less than 90, so you're fine.  v60 cards would not work here.

---

2. With the 24-105 rf 2.8 zoom at 3 pounds I believe, can it just be attached to the camera at all times and be supported that way or does it need a rail system that can help support the weight of the lens? I ask because I’ve read that the lens has a tripod support part.

---

It's a valid concern, and personally I'm not super-clear on just how much weight the RF lens mount can hold safely.  Most of my lenses are in the 1kg range, which is 2.2 lbs, and I've never felt any doubt or concerns about the weight of the lens on the camera.  So my guess would be that you're OK.

Having said that, your lens does have an auxiliary mounting bracket.  Maybe someone who has that lens needs to chip in here.

[Thefilmaddict]

Thank you!!!

[AtticusLake]

If that was helpful, you might want to consider marking it as an accepted solution.  That way other people can find the same answer.

Cheers!

[Thefilmaddict]

I am waiting to hear back if the lens needs support or if it can just be attached to the camera (when the camera is on a tripod). 

[Hazel_T]

Hi Thefilmaddict,

For your lens question that depends on what you mean by having the lens attached at all times. If you are asking if it is okay to use the lens unsupported with the EOS C80 that will work. The mounts on our cameras are designed to support our lenses.

The RF24-105mm F2.8 L IS USM Z lens tripod mount is to give people options for where they want to mount the equipment to a tripod. For longer lenses it can be helpful to mount the equipment using the lens tripod mount since it better balances the weight of the lens and camera body on the tripod head. That can help make leveling the tripod head easier.

If you are asking if it is okay to keep the lens attached at all times whether the camera is being used or not that can be a different answer. When the camera is being transported from one location to another we recommend removing the lens. The vibrations during transport can be hard on the mounts if the camera and lens are left connected during transport.