Just seeing if anyone has done this, obviously there will be a speed issue however if I was using it with a cf express card, and set the SD to JPEGs, I don't have the R5 yet, just trying to price out things, I already have a few V30 cards for with my current camera, then upgrading, the new camera, EF to RF adapter, spare battery, CF card and the reader for the pc, it would be great to not drop another couple hundred on a fancy SD card for now, as I am trying to move around the globe right now so the extra saving would be great, it would be a temp thing as I will upgrade once I get settled. thanks in advance guys
Welcome to the forum Yatys, you did not mention what type of photography you need a more advanced SD card for, for the majority of my photography I use cheap generic SD card, usually about 32 to 64 GB, purchased at the supermarket, this covers video, and stills, I have a gross of them so there is always one on hand, a simple format before I use them is all that is needed.
I do mostly wildlife, with some landscape thrown in and I plan to play around with astro once I get the chance, I know the camera will be fine running just the CF express card but I was thinking since the camera as 2 slots, I may as well throw something in just as a backup while I get settled
I don't buy the cheapest or highest end, I surely don't think it is needed to spend a few hundred on a SD card. I haven't spent more than 50 on a CF card in the last decade, But to be honest I have a couple of 32 and 64 gig cards and that is all i normally need for space. Looked on amazon, a SanDisk 256GB Extreme PRO SDXC UHS-I is about $55 and a 128gig is $30... I usually trust Sandisk and their mid tier cards and have never had any real issues. https://www.amazon.com/SanDisk-256GB-Extreme-UHS-I-SDSDXXY-256G-GN4IN/dp/B07H9VX76D/ref=sr_1_2?keywords=sd+sandisk+256&qid=1641480570&sprefix=sd+sand,aps,183&sr=8-2&th=1
Maybe it is a pricing difference where you are, 30-50 in USD is a small investment cost compared to the rest of the gear. I would not recommend going dirt cheap but a $30 sandisk should be sufficient.
I was asking in regards to the UHS-2 cards, V90 is £180 on amazon, or more so if they are required for this camera
Well your original post said you had CF express and asked about also grabbing expensive SD. There really was no context to why you would need such speed. The main answer is you don't need fancy memory card as modest priced memory will work and perform in most situations. You never mentioned if your shooting video you talked about raw +jpg. If your constantly shooting high burst rate you will want faster cards yes. If your shooting 4k you probably will need a very fast UHS -1 if not the UHS -2. You will probably need CF Express for 8k if your shooting that. Someone put a page together on that topic https://alikgriffin.com/best-memory-cards-canon-r5/
I use a UHS 1 card for jpegs in my R5's most of the time along with Delkin CFexpress Power cards for RAW. I never have a problem with them slowing things down. I also have a couple of Delkin UHS2 cards if I want to shoot RAW to both cards but I rarely do that. I bought those cards when I was also shooting an R6 but since I went with a second R5 they aren't used much now. I've been using the Delkins for 15 moths now and haven't had any problems at all and they are much cheaper than Sandisk and Sony CFexpress. I would also suggest the Pro Grade CFexpress UHS2 card reader combo, it's faster downloading than my Delkin CFexpress card reader.
Choose a memory card that suits you best in terms of compatibility and gives you an ample amount of storage to run through the tasks you want go in using that DSLR of yours to take some decent images and shoot a variety of quality videos. It all depends upon the purpose you want to use your camera for. So it's not always about how expensive gears and altercations you are going for in your journey. It matters by looking at the worthiness and durability to be at a notch when that is going to be needed.