cf to sd

I have an XTI . I also have the adapter from CF to sd card . [movie camera uses SDand I borrow cards at weddings , parties etc] It is faster when I put SD cards into the adapter and put adapter into firewire reader .
The question is will the new SD cards make the camera git rid of the busy signal faster , if used with the adapter ?

Well, firstly, you probably have a SD to CF adapter (;

I don't really understand your question. Do you mean "are the newer SD-cards faster than the old ones?" or "are SD-cards faster than CF-cards?"?

In both cases, it depends on the card speeds. Should say so on the cards themselves. (SanDIsk for instance call their cards different things. Google the name to find out.)

Thanks , I get about 6 rapid shots [raw +jpeg on sandisk extreme III] , then a busy signal .
Since the newer cards are faster for video - did not know if camera software or card was the slow link .
I have looked on Canon site plus about a 100 reviews on the XTI but no one says the speed the camera is capable of [download picture from camera to card .].
I don't really see a difference when using different cards - but even if I took 6 shots , swapped cards , the picture sizes would change . I would like to get 8 or 9 shots before the busy showed up .
Yes I know - I am probably going to get either a 7D or T2I next month . Everything except the batteries and memory should fit . Hoping for a good sale for the 4th .

r.morales wrote in post #10426986
I have looked on Canon site plus about a 100 reviews on the XTI but no one says the speed the camera is capable of [download picture from camera to card .].

Really? Then you must have looked at 100 bad reviews. Or just not bothered doing simple math.

How are we supposed to use this information when you don't give us information on what cards you use?

Picture size? Do you mean filesize? This changes if you don't shoot the same thing every time (JPEG-compression)

400D uses CF. 7D uses CF. No incompatibility-issues.

Overall: Make your posts a lot clearer than the mess they are at the moment. (:

sorry --
Really? Then you must have looked at 100 bad reviews. Or just not bothered doing simple math.
So doing simple math , what speed card should I have / use ?
How are we supposed to use this information when you don't give us information on what cards you use?
The cards are sandisk extreme III , Sandisk ultra II , Lexar platinum II and a couple of transcends 133X .
Picture size? Do you mean file size? This changes if you don't shoot the same thing every time (JPEG-compression)
I shoot raw +jpeg either AV or TV - generally over expose 1/2 or 1 stop depending on shadows and if sence [Seen] is back lit .
400D uses CF. 7D uses CF. No incompatibility-issues.
The 7 d is heavier - cost about twice as much - but will use same CF cards . If I go for the T2I - I will have to buy SD cards and as far as I know - there isn't an SD firewire reader out there - yet .
Thanks for answering

r.morales wrote in post #10431417
So doing simple math , what speed card should I have / use ?

One that won't be a bottleneck to your system.

Jonta wrote in post #10393830
Seems there are two things that improve with faster cards:

1: Buffer clears quicker. Meaning: You can shoot a series of, say 20 pictures at full fps, and you can shoot again after 10 seconds, instead of 90 seconds.
2: Transfer rate from card to PC.

Well, like already quoted; incamera, the only thing that will improve is the bufferclearing. That's why you can read maximum number of RAW and JPEGs in a row in a camera's spec. It's independent of the memory card, and depends on the camera's buffersize.

This is information we already have, or don't need.

Look; have you ever noticed that some of your JPEGs are larger than others? Take a picture of something complex, and JPEG doesn't compress that much (dynamic compression), simpler things can be compressed more easily.

With 400D I get up to about 4 MB pr. image. 11 MB RAW if I'm not mistaken.

So, with RAW + JPEG, my guess is up to 15 MB pr. image.

Now, with a buffer rated to take on up to 10 RAW in serial shooting (27 JPEG at 4 MB is a lower number of 108 MB), you get 110 MB.

With me so far?

110 MB / 15 MB (RAW + JPEG) = 7,333 -> 7.

So... what to do?

You can stop shooting RAW+JPEG, which will get you from 7 to 10.

Unfortunately for 400D RAW users, one can't shoot RAW+JPEG at anything but JPEG L-fine.

Thanks , that makes more sense . When does the speed of cards come i ?
I shoot at 1/2 to 1 stop overexposing the shot . This increases the file size 5 to 10% , but you can bring out a lot more detail / colors in PS .
I shoot raw + jpeg because a lot of the time at a wedding on the way to reception includes a stop at a 1 hour photo - I drop off pictures - that wife to reception [She gets a table] then I go pick up pictures . Graduations parties anniversaries Church a stop at a 1 hour photo - I drop off pictures - that wife to party for table then I go pick up pictures . Then I copy the pictures from everyone else's camera cards and download to my mac .

Well, Rob Galbraith seems to not have a test for the XTi. You could maybe get an idea about practical limitations on card speeds in various cameras by interpolating between his XSi results and his XT results. Looking at the x0D models that are roughly contemporaneous with the XTi should also help. Just remember that SanDisk, for instance, upped the speed rating for their Ultra II and Extreme III cards along the way. If I had to guess, I'd say that the XTi probably was a bit faster than the 30D, maxing out at around 8 MB/sec for RAW and 6+ for JPEG. So anything much faster than the Extreme III would be empty speed unless and until you plan to upgrade cameras. Of course, faster cards will download much faster into your computer via a reader, too, so that's a gain.

Consulting the Galbraith database, the best CF card performance for RAW files was write speed of 32Gb/sec from a Nikon, and 19.8GB/sec from a Canon, and the best SDHC rate was 20.1 from a Nikon and 15.3 from a Canon. I am not impressed with SDHC performance. SDHC was invented for economy of manufacture. The fastest class of SDHC is 80GB/sec, while for CF+ and CompactFlash Revision 4.0 (2006) they added support for IDE Ultra DMA 133 for a maximum data transfer rate of 133 MB/s (UDMA 133).

Thanks - Jon and Wilt
With the money I have invested in CF cards , I will probably end up with a 7D . The big reason I went with the XTI was the fact I already had a bunch of CF cards . The cards were expensive then - not so much now . I have probably 20 CF cards from 8 mb to 16 GB . The SD cards I have go up to 2 gb . [for the canon movie camera .
The big reason for wondering / asking about speed / buffer / busy signal - is for people - I seldom use my 580 II . Someone blinks , nods , takes a breath . Using PS to replace closed eyes , Illustrator to put a smile on a face or cutting and paste-ing takes me too long .
I am just afraid getting the 7D is more camera than I will use or figure out .

Once you've got it, you'll have the incentive to figure it out . . . It's a very nice camera.