RP: "undocumented product feature"

[SteveinLouisville]

At least that's what Microsoft calls their bugs.

I was having a strange experience with my RP. In Av and P mode, the camera would not increase ISO automatically to compensate for a Tv/Av combo that resulted in a shutter speed too slow for a blur-free exposure. (Yes, on my camera CF 1>6 safety shift is set to "2")

So, why was I getting 1/6 sec shutter speeds at ISO 320 and Av 7.1? ISO should have shifted to require a shutter speed of at least 1/40 of a second, and probably 1/60th of a second, but it didn't, even though the attached screen shot shows "Auto ISO>on."

So, what's going on? I looked through all the menu options and the camera was set up like it should be...except for one thing: Camera>2>external speedlite control>slow synchro was set to "1/180-30 sec. Auto." Setting it back to "1/180-1/60 sec. Auto" resolved the issue and the camera now behaves as expected in P or Av mode. (The downside is that in P or Av mode, the slowest shutter speed the camera will ever select is 1/60 of a second for anything longer than 40mm. No big deal: that is what M mode is for.)

Note: this setting is under "External Speedlite Control" and, silly me, I thought that it only applied when I had a Speedlite on the camera. Not so. This changes how the RP calculates shutter/aperture across the board and apparently disables safety shift, "auto ISO" whether there is a Speedlite on the camera or not.

Thought you all might find this helpful, though I don't know if it applies to any camera other than the RP.


Screen shot

 

[achill3s]

At least that's what Microsoft calls their bugs.

I was having a strange experience with my RP. In Av and P mode, the camera would not increase ISO automatically to compensate for a Tv/Av combo that resulted in a shutter speed too slow for a blur-free exposure. (Yes, on my camera CF 1>6 safety shift is set to "2")

So, why was I getting 1/6 sec shutter speeds at ISO 320 and Av 7.1? ISO should have shifted to require a shutter speed of at least 1/40 of a second, and probably 1/60th of a second, but it didn't, even though the attached screen shot shows "Auto ISO>on."

So, what's going on? I looked through all the menu options and the camera was set up like it should be...except for one thing: Camera>2>external speedlite control>slow synchro was set to "1/180-30 sec. Auto." Setting it back to "1/180-1/60 sec. Auto" resolved the issue and the camera now behaves as expected in P or Av mode. (The downside is that in P or Av mode, the slowest shutter speed the camera will ever select is 1/60 of a second for anything longer than 40mm. No big deal: that is what M mode is for.)

Note: this setting is under "External Speedlite Control" and, silly me, I thought that it only applied when I had a Speedlite on the camera. Not so. This changes how the RP calculates shutter/aperture across the board and apparently disables safety shift, "auto ISO" whether there is a Speedlite on the camera or not.

Thought you all might find this helpful, though I don't know if it applies to any camera other than the RP.


Screen shot

Thanks for posting! I did not have this issue but it reminded me I had an issue on the R, actually, not 100% sure if it was an issue or not because I did not thoroughly check it, but I saw once that it would not maintain the Auto ISO setting when shooting with flash. If Auto ISO was set it would always just drop to ISO 100 when the flash fired even though it was clearly adjusting ISO on the back of the camera. So I got used to shooting full manual with flash to avoid that. But, it appears that it works on the R5 with Auto ISO and E-TTL both enabled. At least I know if I have a good bounce with the flash on manual the Auto ISO should give slightly more consistent results. Even though it's not 100% necessary it is a nice to have for consistency's sake, although its kind of splitting hairs I like having the subject/background lighting balanced nicely from shot to shot.

Now what they need to add is a proper flash WB. Setting Auto WB for flash never works properly in my experience and the Flash WB preset is just a static setting like a manual WB so it does not work if the light color shifts as you move around a room or if the light ratio changes.

And while I'm dreaming, a real-time auto adjusting flash temperature adjustment would be great. If the EL-1 had that I would have been 10 of them already, LMAO.

 

[RLight]

Too bad we don't have a part of the site dedicated to nerd-humor.

On a serious note, that sounds like artifact NVRAM data that's incompatible with newer firmware; if I had to guess.

Not your fault (Canon's obviously here); you've updated the firmware at some point on your RP, yes? I'm actually asking not because you haven't, but I suspect this bug is a result from updating since clearing the setting clears the problem.

Dollars to donuts, the RP isn't the only model to share this "feature". Probably all of em (as they likely share the same code fork), till Canon fixes it...

Favor? Have you reported this to Canon USA support yet? You should. Get Canon's engineers started on fixing it. All of us R owners could in fact share this bug, including upcoming R's as it's probably the same code for this module being reused across the R's.

Good find. Happy Friday!

 

[SteveinLouisville]

Too bad we don't have a part of the site dedicated to nerd-humor.

On a serious note, that sounds like artifact NVRAM data that's incompatible with newer firmware; if I had to guess.

Not your fault (Canon's obviously here); you've updated the firmware at some point on your RP, yes? I'm actually asking not because you haven't, but I suspect this bug is a result from updating since clearing the setting clears the problem.

Dollars to donuts, the RP isn't the only model to share this "feature". Probably all of em (as they likely share the same code fork), till Canon fixes it...

Favor? Have you reported this to Canon USA support yet? You should. Get Canon's engineers started on fixing it. All of us R owners could in fact share this bug, including upcoming R's as it's probably the same code for this module being reused across the R's.

Good find. Happy Friday!

I updated the firmware to 1.6.0 so I have the latest. I will sent something to Canon, if I can figure out where to send it!

 

[RLight]

Too bad we don't have a part of the site dedicated to nerd-humor.

On a serious note, that sounds like artifact NVRAM data that's incompatible with newer firmware; if I had to guess.

Not your fault (Canon's obviously here); you've updated the firmware at some point on your RP, yes? I'm actually asking not because you haven't, but I suspect this bug is a result from updating since clearing the setting clears the problem.

Dollars to donuts, the RP isn't the only model to share this "feature". Probably all of em (as they likely share the same code fork), till Canon fixes it...

Favor? Have you reported this to Canon USA support yet? You should. Get Canon's engineers started on fixing it. All of us R owners could in fact share this bug, including upcoming R's as it's probably the same code for this module being reused across the R's.

Good find. Happy Friday!

I updated the firmware to 1.6.0 so I have the latest. I will sent something to Canon, if I can figure out where to send it!

https://www.usa.canon.com/internet/portal/us/home

Click the Feedback + symbol on the top left.

Product

File the feedback in comments

I'm told Canon reads them, btw.

 

[SteveinLouisville]

https://www.usa.canon.com/internet/portal/us/home

Click the Feedback + symbol on the top left.

Product

File the feedback in comments

I'm told Canon reads them, btw.

Thanks! I just sent this to the above link: I will let everyone know what answer I receive.

"EOS RP possible firmware bug: In Av and P mode, the camera would not increase ISO automatically to compensate for a Tv/Av combo that resulted in a shutter speed too slow for a blur-free exposure. (CF 1>6 safety shift was set to "2") I was getting 1/6 sec shutter speeds at ISO 320 and Av 7.1? ISO should have shifted to require a shutter speed of at least 1/40 of a second, and probably 1/60th of a second, but it didn't even though "Auto ISO>on." Checked menu options and camera was set up correctly, except:" Camera>2>external speedlite control>slow synchro" was set to "1/180-30 sec. Auto." Setting it back to "1/180-1/60 sec. Auto" resolved the issue and the camera now behaves as expected in P or Av mode. This setting is under "External Speedlite Control" and I thought that it only applied if a Speedlite was on the camera. Not so. This setting also changes how the RP calculates shutter/aperture across the board, even without a speedlite. I believe this is a bug in the firmware."