02-03-2019 03:01 AM
.. Which Memory card is best for your camera? ..
.. Know your Memory Card..
This question is repeatedly asked by many and hence, I am trying to give an answer in a non-technical manner.
My suggestion is to understand some of the Letters or Markings on a typical SD Card. And this in turn, will guide you to decide your Card. Understanding a little bit of these details (we will not go technical) will help you in future too.
Markings' on a typical SD (Secured Digital) Card: (Referring to the image, given above)
Mark -1: 32 GB = this indicates the storage capacity of the card, which you already know. (Can be 16, 32, 64, 128, 256, 512GB [up to 2 TB])
Mark -2: SDHC or SDXC – This again describes the Storage Capacity; if the card carries the mark:
Tip: Depending upon your selection of 32 or 64GB, this LETTERS will automatically follow.
Mark -3: Rated Speed: this figure is ‘Data Transfer Speed’ claimed by the manufacturer – usually, the read speed of the card is mentioned, which is higher than the write speed.
Tip: For practical purpose, to shoot without ‘Drop of Frames’, we need a rated speed (I recommend) of 60 MB/s or above.
Mark -4: Speed Class 10: this is an earlier classification & we need Class 10 (10MB/s minimum; the actual speed may be much higher, than 10 MB/s)
Mark -5: U3 (UHS Class): one of the latest standards, defining the minimum (sustained) write speed: we need U3 (30 MB/s, minimum).
Tip: (for Point 4 & 5): When we say U Class 3, Class 10 automatically follows – ie, we need U3 with C10.
Mark -6: SDHC-I (or SDXC-I) (ie. UHS Class I): Up to 104 MB/s sustained write (bus) speed – we need UHS Class I Card.
Mark -7: V30: Video Speed Class – we need V30 for best, high resolution video recordings & playback.
NOTE: for High quality (4K, like) video recording, we need (ideally) up to 100 MegaBITS/Sec. (Mb/s) = 12.5 MegaBytes/Sec (MB/s) recording speed.
Tip: (for Point 6 & 7): For Stable, continuous Video recording, UHS Class 1 & Video Class V30 is most ideal for 4K, 360 Spherical, Virtual Reality, etc.; hence we need UHS I & V30.
NOTE: The international organization, the 'SD Association', framed different specification, (from time to time) through different Versions 1, 1.1, 2, 3 etc., enabling better speed, capacity & other parameters. Thus, different Figures, Characters, etc. came on SD Cards - Few of these markings are repetitions/overlapping.
Hope, these data will help you to identify your ideal card….
What is not marked (& Important for you):
The Pro Series Cards, normally are very sturdy (ie. Usually, Shock-proof, temperature-proof, waterproof and x-ray-proof, etc., with longer guarantee periods). The indicative price of a Standard, regular 32 GB card is around $12, when the Pro card will be around $16 (with the above parameters).
‘LOCK’ on a SD Card is to enable / disable the Write (Edit [modify], delete, etc.) protection only; one can read the content of a Locked card.
NOTE: Technically speaking, these parameters are common for Standard SD Cards and Micro SD Cards – ie. For your Modern Mobile cameras capable of shooting with 4K resolution or DSLRs & Mirrorless, these specifications are recommended.
PS: Those who are interested to know further details, are welcome.
My previous Technical Post - Starburts Here