OTHER: Lens change with Red on?
- Thread starter rawfa
- Start date
DustinSchmidt
Well-known member
I have done this many times on the Komodo and also other cameras. Sometimes this has been with PL mount, sometimes EF mount, sometimes RF mount.
I don't know the specifics of it impacting the camera, but to your point, often I don't have time to boot up and down.
cyvideo
Veteran
I was advised some time back by Sony that it is best to power down first before a lens change for two reasons.
1) On all cameras when power is on to the sensor it has higher static properties and attends to attract more floating dust. A number of the later Sony cameras have the ability to close off the sensor when the power is off to keep the sensor shuttered during lens changes.
And
2) Most mirrorless, (Sony specific here) cameras with IBIS or equivalent park the sensor when powered down and that the IBIS will correctly reinitialise to its correct Steady Shot setting on powering back up to match it to the focal length of the lens that has just been attached. That's assuming the menu setting for this Steady Shot lens focal length function is set to AUTO. Apparently this doesn't always reinitialise correctly with a hot lens swap with some Sony native lenses that have this lens focal length communication capability. Also involved in this reinitialising process is the correct communication between the camera body IBIS protocol and the lens OSS protocol if an OSS capable lens is fitted. To guarantee 100% correct operation of all the Steady Shot protocols that involve lens focal length calculations and IBIS/OSS related functions you need to power down, swap and then power up. Especially so when in video mode, where there are extra protocols on some lenses such as 'Active Steady Shot' that can be engaged. The Active Steady Shot protocols are very lens specific and stored in the lens file memory chip and this information has to be correctly passed on to the camera body. This is a 'cold logic process' and all happens at power up.
Though I was also assured that there is a logic safety control to prevent unsafe power throughput until all contact pins have communicated their contract status when hot lens swaps are carried out.
I have done hot lens swaps under time constraints and have nor really experienced any adverse effects but as a general working practice, for the above reasons I will always whenever possible power down, swap lens and then power back up. A bit more background on these Steady Shot focal length functions in the following video.
Chris Young
1) On all cameras when power is on to the sensor it has higher static properties and attends to attract more floating dust. A number of the later Sony cameras have the ability to close off the sensor when the power is off to keep the sensor shuttered during lens changes.
And
2) Most mirrorless, (Sony specific here) cameras with IBIS or equivalent park the sensor when powered down and that the IBIS will correctly reinitialise to its correct Steady Shot setting on powering back up to match it to the focal length of the lens that has just been attached. That's assuming the menu setting for this Steady Shot lens focal length function is set to AUTO. Apparently this doesn't always reinitialise correctly with a hot lens swap with some Sony native lenses that have this lens focal length communication capability. Also involved in this reinitialising process is the correct communication between the camera body IBIS protocol and the lens OSS protocol if an OSS capable lens is fitted. To guarantee 100% correct operation of all the Steady Shot protocols that involve lens focal length calculations and IBIS/OSS related functions you need to power down, swap and then power up. Especially so when in video mode, where there are extra protocols on some lenses such as 'Active Steady Shot' that can be engaged. The Active Steady Shot protocols are very lens specific and stored in the lens file memory chip and this information has to be correctly passed on to the camera body. This is a 'cold logic process' and all happens at power up.
Though I was also assured that there is a logic safety control to prevent unsafe power throughput until all contact pins have communicated their contract status when hot lens swaps are carried out.
I have done hot lens swaps under time constraints and have nor really experienced any adverse effects but as a general working practice, for the above reasons I will always whenever possible power down, swap lens and then power back up. A bit more background on these Steady Shot focal length functions in the following video.
Chris Young