Black Spots on Dendrobium, Tiny Yellow Spots on Paph

[KristofferNgo]

Hi

There are some black spots on the leaves of my dendrobium. It appeared after I placed the dendrobium on direct sunlight at the garden, and the leaves, I assumed, got burned, then these black spots appeared. After 2-3 weeks, the other leaves that had this recovered and are now in normal condition, however this one is still there. Is this some type of fungal/bacteria infection, but my plant had the resistance to make the other leaves recover?

Secondly, I have a Paphiopedilum that has tiny yellow spots with a black dot at the middle. There are also tiny yellow spots on 2 other leaves. After 1 week of observation, the spots don't seem to grow. Is this something I should be concerned about? The yellow spot is similar to the 3rd/bottom picture that I got from Google, but is an enlarged version. I assume the yellow spot would grow at that size if left unchecked. Is this a type of Pseudomona?

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