Dngallagher Loc: Wilmington De.

A couple of real handy links if you want info on SD cards, speeds and comparisons....

http://www.sdcard.org/about_sda/

http://www.cameramemoryspeed.com/

Revet Loc: Fairview Park, Ohio

I just got a D7100. One of the few knocks about this camera is the small buffer size if you are doing continuous shooting. You can help this with a fast SD Card because it will write to your camera faster (emptying the buffer). I bought an ultrafast 32 Gig Sanyo model (95 Mbps read speed) but from what I understand this is overkill. I tend to overdo things and it was not very expensive so what the heck!!

dcampbell52 Loc: Clearwater Fl

Micro card adapters to SD will not work in the D7100 and should not be used in any Nikon DSLR. Having said that, I have had good luck with one compact flash to sd adapter in the D70s but others I have tried have been terrible. The D90 uses SD cards and, while all of your high speed cards for the D7100 will work in the D90, The slower cards for the D90 may cause some issues with the D7100, especially in trying to shoot quickly and the camera stalling while writing to the card.

spdmn54 Loc: Avon Lake, Ohio

Your best bet is to purchase high speed sd cards, watch your write speed as the higher the better, this allows faster picture transfer from the buffer memory to the camera

Pentkon Loc: Middle TN

I too recommend carrying smaller cards. Having had cards fail before. The last time We were away from home when the card failed after around 10 shots. I lost all of those but I reached into my bag swapped it out for another and continued with the day. I carry a couple of smaller 8GB cards so I don't lose all my shots from the day. I also empty the cards and RIC when I get home. So they are always ready to go empty and clean.

singleviking Loc: Lake Sebu Eco Park, Philippines

Speed of the SD card is a relative thing, so if the SD or CF card speed exceeds the camera's buffer speed, you're paying for speed that actually can't be utilized. Read/write speed comes into play during BURST photography so that the buffer can transfer data to the SD/CF card fast enough to enable the next photo to be taken without additional delay in order to accomplish the camera's fastest burst rate. This burst speed is also related to the pixel count of the camera, so higher pixel count typically means larger photo files.

Just remember that during burst photography use, the camera can not continue to take photos until the buffer has cleared so having a memory card that's 10 times faster than your camera's buffer/processor will only empty your wallet faster and not make your camera function faster.

Your camera's manual will state the buffer speed and recommended card write speed. The card's read speed only comes into play during files transfer to your computer, so under USB 3.0 format, this is limited to a bit over 6 gigabits per second.

Hope this clears up your question.

Larrymc Loc: Mississippi

I just bought a Pentax K-3 which has a 24mp sensor dual SD slots and shoots bursts at 8.3 frames per second so it needs a pretty fast SD card to keep the buffer from slowing everything down. I found some 32gb Sony SD cards at B&H that are claimed to have a max write speed of 90MB/s which is damn fast. So far they have lived up to my expectations.....a bonus is you can buy them right now for $29.95 buy two and you get free shipping. link http://www.bhphotovideo.com/c/product/1071441-REG/sony_sf32uz_tqn_32gb_sdhs_uhs_1_u3.html

Larrymc

Dngallagher Loc: Wilmington De.

Nice speed and price if it is real - only a real test will determine though - most cards only cluck about the READ SPEED, write speed is usually half of what the read speed is.

I ran out and bought a pair of Transcend 32 GB cards that claimed 90 MB/s 600x - well, on real world testing shooting a burst of 14 bit lossless raw files they were a tad sluggish, ended up a FPS rate of 1.53 shots per second, 46 shots in 30 seconds.

Using a $20.00 Samsung Pro 32 GB read 90/write 80 I get 79 in 30 seconds, 2.63 FPS

I put those transcends in the spares case ;)

mborn Loc: Massachusetts

I use 16-32 G SD class ten cards in my D7100

busmaster2 Loc: College Point NY

Any type of card can be adapted to a larger card. For example my Sony a100 uses the largest cards, whereupon I've purchased two adapters for micro and sd cards. Put them all together and you can use micro cards in an sd slot and in turn, the largest cards.

Dngallagher Loc: Wilmington De.

Class 10 only means 10 MBs read minimum.... they could be 95 MBs or 10 MBs read, or 5 MBs write....

For me the write speed is important, I want to clear out that teeny tiny buffer as fast as possible.

Dngallagher Loc: Wilmington De.

What advantage is there to using a micro card with an adapter in a SD card slot on a camera? Other then using the same cards in a phone & camera of course.

blackest Loc: Ireland

android tablet for one, you might not want to review images on a phone, but a tablet screen works well. It is also one step less to social media or perhaps reporting. Although a wireless card could perhaps also be a handy alternative.

elee950021 Loc: New York, NY

Yes, your current SD cards will work in a new D7100. Download a D7100 manual from the Nikon website and check the cards they recommend. Superfast cards are a waste if the buffer only has so much capacity.

The "adapters" mentioned might be those that often accompany micro-SD cards for use in phones and tablets. They allow use in cameras using regular sized SD cards or for reading or transferring images or music, using a card reader, for those phones or tablets. I've been testing their usage in my D800 and they work fine. Of course, my type of photography doesn't require speedy cards. The other type of "adapter" allows one to use any SD card in a camera that takes Type 2 CF cards which are slightly thicker than regular CF cards. I have Canons, 1Ds, 1Ds2 and 1Ds3 and a D300 Nikon which can use these cards. Advantages are lower prices as SD cards are cheaper than CF's and available everywhere.

There are a number of different SD cards: SD, SDHC and SDXC and they differ in their capacity and speed. "Faster" cards are needed if you do video; your D90 I believe can use SD and SDHC while the D7100 can use all 3 types.

I hope this info is useful and best wishes and happy holidays and new year to all.

singleviking Loc: Lake Sebu Eco Park, Philippines

With the proper APP installed, you can plug the micro-SD cards right into a tablet computer or Smartphone and open photos or upload them to cloud storage. Most tablets and Smartphones do not have built in slots for the large SD cards. APPLE's iPad needs an optional adapter.