Filter observations by camera model

[danaleeling]

@kastani

There are observation fields where you can input pretty much any existing parameters that come to mind, including camera model. And filter for personal observations works quite well.

There are some existing observation fields for cameras. A search for camera at will turn them up:
https://www.inaturalist.org/observation_fields/

Searching those fields may require using a search URL:

https://forum.inaturalist.org/t/how-to-use-inaturalists-search-urls-wiki/63