p.1 #1 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
Hi. I've just joined this forum and I've just purchased a Fuji X-T5 with no prior knowledge of the Fuji system, although I do already own a Sony A7.
I just noticed in the Movie Mode settings on the X-T5 the message ' cannot use S.S. slower than frame rate' message for all choices. At first I thought there was some setting I had to turn on or off in order to enable this , but I read the relevant chapter in the manual and there is no mention of this .
I read posts on several other forums from people who also wanted to experiment with slower shutter speeds in their film making - frustrated that their Fuji camera seemed not to be able to do it. Some responses to these posts suggested that you can't take the shutter speed below the frame rate from a purely physics point of view but contrary to that, I found information on the internet saying that you can, but not all cameras will do it.
My Sony A7 has manual exposure mode which allows you to freely adjust the shutter speed regardless of the frame rate setting - so it appears that you can do it , at east on that camera.
So is this a limitation of the Fuji X-T5 or is there a workaround? If the X-T5 cannot do it, is there a Fuji camera that can? I have only just purchased the X-T5 so as much as I like it already, it's not too late to return it for an exchange for a camera that does what I want it to do.
p.1 #2 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
I’m not an expert on movie formats but you might try changing from long GOP to all intra in the settings
Oct 15, 2025 at 01:52 PM
Steve Spencer Offline • • • • • • • Upload & Sell: On
p.1 #3 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
The Flying Man wrote:
Hi. I've just joined this forum and I've just purchased a Fuji X-T5 with no prior knowledge of the Fuji system, although I do already own a Sony A7.
I just noticed in the Movie Mode settings on the X-T5 the message ' cannot use S.S. slower than frame rate' message for all choices. At first I thought there was some setting I had to turn on or off in order to enable this , but I read the relevant chapter in the manual and there is no mention of this .
I read posts on several other forums from people who also wanted to experiment with slower shutter speeds in their film making - frustrated that their Fuji camera seemed not to be able to do it. Some responses to these posts suggested that you can't take the shutter speed below the frame rate from a purely physics point of view but contrary to that, I found information on the internet saying that you can, but not all cameras will do it.
My Sony A7 has manual exposure mode which allows you to freely adjust the shutter speed regardless of the frame rate setting - so it appears that you can do it , at east on that camera.
So is this a limitation of the Fuji X-T5 or is there a workaround? If the X-T5 cannot do it, is there a Fuji camera that can? I have only just purchased the X-T5 so as much as I like it already, it's not too late to return it for an exchange for a camera that does what I want it to do.
Many thanks in advance for any help and advice...Show more →
I wish I could help more. I generally set the shutter speed to 2X the frame rate, so I have never tried to do what you are trying to do. Are you looking for a special effect? If you could help us understand why you want to go so slow with the shutter speed maybe we can help figure out a work around.
p.1 #4 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
The Flying Man wrote:
Hi. I've just joined this forum and I've just purchased a Fuji X-T5 with no prior knowledge of the Fuji system, although I do already own a Sony A7.
I just noticed in the Movie Mode settings on the X-T5 the message ' cannot use S.S. slower than frame rate' message for all choices. At first I thought there was some setting I had to turn on or off in order to enable this , but I read the relevant chapter in the manual and there is no mention of this .
I read posts on several other forums from people who also wanted to experiment with slower shutter speeds in their film making - frustrated that their Fuji camera seemed not to be able to do it. Some responses to these posts suggested that you can't take the shutter speed below the frame rate from a purely physics point of view but contrary to that, I found information on the internet saying that you can, but not all cameras will do it.
My Sony A7 has manual exposure mode which allows you to freely adjust the shutter speed regardless of the frame rate setting - so it appears that you can do it , at east on that camera.
So is this a limitation of the Fuji X-T5 or is there a workaround? If the X-T5 cannot do it, is there a Fuji camera that can? I have only just purchased the X-T5 so as much as I like it already, it's not too late to return it for an exchange for a camera that does what I want it to do.
Many thanks in advance for any help and advice...Show more →
Maybe I’m being dense — it happens, and I might be suffering from the aftereffects of today’s covid vaccination ;-) — but it seems like it would be literally impossible to set the “shutter speed,” or exposure time to a value longer than the interval between frames — e/g: 1/frames-per-second..
To use simple numbers, let’s say that your frame rate is 30fps. The camera has to produce a new image every 1/30 second. A longer exposure would require more time than that between successive frames, right? With successive 1/20 second exposures, there is only time for 20 of them in 1 second (ignoring necessary time between frames, which will reduce that a bit more), so a 30 fps rate isn’t possible at a longer-than-1/30 second exposures.
Basically, A second is not long enough to hold 30 1/20 second exposures. 30 x 1/20 second exceeds 1 second.
p.1 #5 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
I agree with Dan's maths. I'm just wondering whether some trickery is involved with electronic shutters and frame rates for movies. But that would mean some timing overlap with consecutive frames, and I'm not sure what the purpose would be.
p.1 #6 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
Historically, in the days of film and mechanical cameras, the frame rate set the 'shutter speed', 16fps was 1/30 from memory. On fancy cameras you could reduce the exposure time from that, usually only for scientific reasons as the slight amount of blur given of moving objects helped the eye's 'persistence of vision' to give the necessary seamless movement. As Dan says it is impossible to get longer than the frame rate allows.
p.1 #8 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
Steve Spencer wrote:
I wish I could help more. I generally set the shutter speed to 2X the frame rate, so I have never tried to do what you are trying to do. Are you looking for a special effect? If you could help us understand why you want to go so slow with the shutter speed maybe we can help figure out a work around.
Thanks Steve - Yes I've been learning about the 180degrees rule in filming so I'll generally be starting with 24fps and a shutter speed of 1/50 but my interest mainly lies in abstract and artistic experimentation so I'm wanting to experiment with motion blur and see what interesting effects slower shutter speeds can create . On the Fuji X-T5 you can drop the shutter speed equal to the frame rate - so that's slowing it down below the 180degrees rule a fair bit - but you definitely can't go below .
I tend to agree with Dan and Gerry - the maths would suggest that it is impossible to take the shutter speed below the frame rate and if that is the case then I accept that and move on - but then why does my Sony A7 do it? In manual exposure mode at 24 fps I can drop the shutter speed to 1/4 and when I move the camera sideways , what I see in the display screen is a ghost-like whited out image with lots of motion blur . I think Geoff may be right - there might be some electronic trickery going on here that defies the physics/maths and maybe only certain cameras can do it?
Steve Spencer Offline • • • • • • • Upload & Sell: On
p.1 #10 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
The Flying Man wrote:
Thanks Steve - Yes I've been learning about the 180degrees rule in filming so I'll generally be starting with 24fps and a shutter speed of 1/50 but my interest mainly lies in abstract and artistic experimentation so I'm wanting to experiment with motion blur and see what interesting effects slower shutter speeds can create . On the Fuji X-T5 you can drop the shutter speed equal to the frame rate - so that's slowing it down below the 180degrees rule a fair bit - but you definitely can't go below .
I tend to agree with Dan and Gerry - the maths would suggest that it is impossible to take the shutter speed below the frame rate and if that is the case then I accept that and move on - but then why does my Sony A7 do it? In manual exposure mode at 24 fps I can drop the shutter speed to 1/4 and when I move the camera sideways , what I see in the display screen is a ghost-like whited out image with lots of motion blur . I think Geoff may be right - there might be some electronic trickery going on here that defies the physics/maths and maybe only certain cameras can do it? ...Show more →
I don't know what Sony does, but what they could do and you could do with a lot of work is duplicate some of the frames. Let's say you wanted to shoot at 1/15 but play it back at 30 fps. You would have just 15 frames in every second if you shot a continuous burst, but you could duplicate every frame and have 30 frames to play back. I don't think the play back would be close to smooth, and would look a bit like time lapse footage, but it would produce a video feed. In fact if you shot at 1/15 and playback at 30 fps and didn't duplicate the frames you would in fact be playing a type of time lapse where you doubled normal time. Depending on what you are trying to do you might think of this time lapse analogy to help you create what you want to create. I have never done anything like that so this is mainly to point you in a direction you might want to try, and it would be some work, but I think it is possible to shoot continuously at a slower speed and turn that continuous shooting into video footage, but you would either have to duplicate frames or the video footage would be depicting the scene in a faster than real time fashion. Some of these effects might be cool, but I don't think they would be easy to implement.
p.1 #11 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
AZ Photo wrote:
Interesting - thats the change that works on my X-H2S - the X-T5 must be different
So its not just a Sony thing
That's interesting - so your X-H2S can do it but only when you select All Intra? I've only had the camera two days so it's possible I just don't know what to turn on /off in order to get it to work or as you say, the X-T5 might be limited in some way - this is what I need to find out - if the X-H2S can do it then I might consider returning this X-T5 for an exchange. If you have any detailed instructions as to what you change in the menu to achieve a SS below a frame rate of 24fps let me know and I'll see if I can reproduce it .
I have emailed Fuji tech support in the UK with this one - I'm hoping they'll reply swiftly with a definitive answer!
p.1 #12 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
I'm afraid you're out of luck -- Sony has a S&Q mode which lets you slow the frame rate down to 1 fps (therefore allowing a shutter speed as slow as 1sec), but Fuji does not have this functionality. The lowest is 24 fps.
Oct 16, 2025 at 10:41 AM
Steve Spencer Offline • • • • • • • Upload & Sell: On
p.1 #13 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
mdude85 wrote:
I'm afraid you're out of luck -- Sony has a S&Q mode which lets you slow the frame rate down to 1 fps (therefore allowing a shutter speed as slow as 1sec), but Fuji does not have this functionality. The lowest is 24 fps.
How does that work? If it is shot at 1 frame per second and played back at 1 frame per second how is that different from a slideshow? Doesn't really sound like video at that point.
Oct 16, 2025 at 11:11 AM
AmbientMike Offline • • • • • • [X]
p.1 #14 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
Regular video framerates are in the neighborhood of 30fps. If you are using 1/8 , you can pretty obviously only get about 8 per second.
Not sure how its gonna look, I'd think you need 30fps or so to get it to work on most platforms
p.1 #15 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
The Flying Man wrote:
That's interesting - so your X-H2S can do it but only when you select All Intra? I've only had the camera two days so it's possible I just don't know what to turn on /off in order to get it to work or as you say, the X-T5 might be limited in some way - this is what I need to find out - if the X-H2S can do it then I might consider returning this X-T5 for an exchange. If you have any detailed instructions as to what you change in the menu to achieve a SS below a frame rate of 24fps let me know and I'll see if I can reproduce it .
I have emailed Fuji tech support in the UK with this one - I'm hoping they'll reply swiftly with a definitive answer! ...Show more →
Media Rec Setting : H.265 ALL-I 420 MOV
Move Mode : 4K 16:9 29.97P
then its possible to use shutter speed less than 1/30 second
it works as expected - presumably more than one frame contain the same image
p.1 #16 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
AZ Photo wrote:
Media Rec Setting : H.265 ALL-I 420 MOV
Move Mode : 4K 16:9 29.97P
then its possible to use shutter speed less than 1/30 second
it works as expected - presumably more than one frame contain the same image
YES! YES! YES! - With that particular combination of settings the message does not appear and it is possible to reduce the shutter speed right down below 24 fps - giving the same ghost-like, whited-out screen and motion blur that I was seeing on the Sony A7 earlier today .
The message appears again for: DCI HQ 17:9, 6.2K and 4K HQ but all the other choices in Movie Mode are clear .
Problem solved! Thanks AZ Photo! Guess I'll be keeping the X-T5 after all!
p.1 #17 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
Just for fun, at the opposite extreme I used a Fastax 16mm for a while in the 60s, industrial motion analysis. Camera would do 10,000fps in theory although we never were brave enough (nor had the need) to go higher than about 6k. 400ft of film didn't last long! Needed arc lights to get a decent f stop.
And we had a projector that would run down to 2 fps.
All made it asy to see what was going on in a production machine.
p.1 #18 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
Steve Spencer wrote:
How does that work? If it is shot at 1 frame per second and played back at 1 frame per second how is that different from a slideshow? Doesn't really sound like video at that point.
Not sure what you mean by "how". It just records images every second and then compiles them into a video, instead of some other fraction of a second (e.g. 1/24, 1/60, 1/120).
Oct 16, 2025 at 03:46 PM
Steve Spencer Offline • • • • • • • Upload & Sell: On
p.1 #19 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
mdude85 wrote:
Not sure what you mean by "how". It just records images every second and then compiles them into a video, instead of some other fraction of a second (e.g. 1/24, 1/60, 1/120).
Yes, but if it records an image for a whole second and plays that image for a whole second wouldn't it look like a slideshow and not a video?
p.1 #20 · Fuji X-T5 - 'cannot use S.S. slower than frame rate' message
Steve Spencer wrote:
Yes, but if it records an image for a whole second and plays that image for a whole second wouldn't it look like a slideshow and not a video?
I suppose so, in the same way that if you took a roll of cinema film and examined each frame every second then it would look like a slideshow.
