One of the often neglected but very useful pieces of camera equipment is the remote control. It gives us the ability to activate the shutter without actually physically touching the camera shutter button.
This could be particularly useful for:
1) long exposures when mounted on a tripod where touching the camera may result in some camera movement and affect the final image ( can be overcome with 2 second timer on camera)
2) intervalometer where you are shooting a subject at regular intervals (Sony has an app for this)
3) astrophotography for shooting multiple long exposures for stacking
4) when the camera is placed a distance away from photographer (where wireless remote would come in handy) e.g. for subjects which may scatter at the sight of anyone
5) to capture long exposures at a precise moment (where using the 2 second timer will make you miss the shot)
The remote control I bought a few years ago was the Pixel TW-282.
The main reasons I bought this were:
1) It could be used as both a wired and also a wireless remote control
2) It has intervalometer capabilities (you can choose interval between shots, length of exposure, and the number of exposures required) – perfect for astrophotography
3) The actual remote comes with a 2.5mm female socket, so different cables can be bought for use with different systems. I have not needed to buy a new remote for each system I have owned, as I just needed to buy the appropriate cable.
In fact, I could use this intervalometer to connect to the Gentled infrared trigger, to wirelessly trigger Sony NEX cameras such as NEX-3, NEX-5N which do not have a dedicated wired remote socket – so they could be used for astrophotography as well.
What could be improved?
1) It did come with a backlight function on the remote transmitter, but unfortunately mine stopped working a few months after I bought it. But it does not bother me, as I do not tend to use it anyway for astrophotography.
2) The price is fairly steep, but if you consider you can adapt it to most systems (Sony, Olympus Micro 4/3rds, Canon, Nikon, Panasonic etc), it is a good one-off investment which will have compatibility for most other brands if needed (someday).
Anyway, I have included links from Amazon below to the Pixel TW-282 remote control, as well as the cable for Sony A7R, A7, A6000 etc, which works with the Pixel TW-282 remote for your reference.
2.5mm Pixel TW-282 cable for Sony A7R, A7, A6000 etc. on Amazon Amazon
Pixel TW-282 remote on Amazon Amazon