Questions about Canon EOS 1300D Kit

Yes. As long as the camera and tripod have the quarter-inch screw hole, it is compatible.

Article 5764207 says it's digitec bundle with a spare battery included. The rest seems to be the same (seems, don't take this as an infallible answer, as I haven't bought these)

Yes, that works in principle. This is the same connection -> Canon EF. However, this camera here uses an APS-C format, the Canon EOS Elan II a full format. You can use full-frame lenses on APS-C (not vice versa). Note, however, the cropfactor, which usually increases the focal length by a factor of 1.5-1.6. A 50mm lens then becomes a 75mm lens, for example. Full-frame lenses are generally heavier and more expensive than APS-C lenses. PS: It is possible that the autofocus of older Sigma lenses does not work on the new cameras.

Hello, unfortunately you cannot connect an external mix to this camera.

I have pre-filtered for you all the compatible telephoto lenses available for this camera at Digitec (you can find more filters on the left): https://www.digitec.ch/de/s1/producttype/objektiv-59?f=647354-647340&tagIds=520

Yes, remote control and external flash (flash shoe available) is possible. The set you mentioned has an additional battery, otherwise the same scope of delivery/equipment. Enclosed is the link to the official product description from the manufacturer: http://de.canon.ch/for_home/product_finder/cameras/digital_slr/eos_1300d/ And all the technical data: http://de.canon.ch/for_home/product_finder/cameras/digital_slr/eos_1300d/specification.aspx