FocusED: Lens Mounts


In this week’s video, FocusEd presents a discussion of lens mounts. Not every lens fits on every camera, and not every lens from each manufacturer works on every camera from that manufacturer. This video examines cameras from Canon, Nikon, and Sony, their mount systems, and explains the differences between their respective mounts.


SD cards are not an issue for me. Never had one that failed in any way and since those little thingh came a lot more cheaper, I stopped recyclyng and I keep them as my "negatives" of the film camera era. Simply when they are full I make a copy of the files in it to other media (external hdd or a drive in a computer depending on the content of the card), write an identification on it and put it in a box to spare it so that when the external or internal media fail (and they will), I can replace every photo to the new one.

For the same reason I don't buy very large cards (no more than 32 gb) so that i don't keep, let's say much more than a thousand pictures in each. You guessed it: I have many cards stored.

Before stoping erasing and formatting them for use them again, the only reason for putting one aside was size, since it was  the era in which sensors began to grow very fastly.





Can you do a video about 3rd party lenses and the issues that could arise compared to non-3rd party lenses?

This informative video about lens mounts I think will help those who are new to the field.

I really enjoyed the humor; it made the whole video move right along.

A question. When using an adapter do you loose anything in the focal length... i.E. if I mount a Leica 28mm on a Sony 6000 do I get a 28mm or do I loose a little. If the answer is, "It depends on the adaptor, then how can I tell if/how much I loose.

As long as the adapter does not have any optics inside the effective focal length will not be modified by the adapter. They only adjust the mounting of the lens to maintain the proper focus distance of the lens on the sensor. There are some adapters that have optics (speed boosters) that do change the effective focal length, usually around 1.7 times. These are for use with 35mm sensor coverage lenses on crop sensor bodies. So the 28mm Leica you have for the a6000 will be a 28mm on that body, you will just need to take into account the 1.5 crop factor for that sensor size if you want to know the 35mm equivalent field of view. I hope that helps answer your question.

What is the life of a memory card???  How do you know when to replace the card??

Buy a Nikon with 2 SD slots and use the 2nd as back-up. A good card should last well  over 5 years. I only use 8 and 16G cards. This way it costs less when it goes bad, Especially at todays prices of under $15 each.