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through binoculars since it appears as a very small faint patch of light possibly requiring averted vision. But in a telescope, M107 is a larger and brighter fuzzy patch of light.
Another small, faint globular cluster in Ophiuchus, (M9) is very similar to M107, only slightly brighter. Another tough one, but possible to see with binoculars.
Another pair of globular clusters in Ophiuchus separated by about four degrees, M19 and M62. Fairly easy to find in binoculars, they are smaller than M10 and M12 though not quite as obvious. These clusters are not resolvable through small scopes, and appear as round fuzzy patches brightening towards the center. M19 is slightly brighter than M62.
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