I have looking at reasons for why my Yongnuo YN560IV would not fire at Highspeed sync on my Nikon D750. I tried some setups, but whenever I go further up than 1/250s shutter speed, the flash won't do the high-speed sync. It will not burst the flash at all, only a single flash.   Any idea why?
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I recently bought myself a pack of four YN560 IV's and a YN560-TX for my Canon camera, and apparently I got ahead of myself and didn't realise I should make sure the flashes support HSS.  I tried them out yesterday at home, and even on 1/128 and 1/250s on the camera, they were overexposing here and there. Unfortunately, I don't really have the space to move the flashes much further from my subject, so I was wondering if there is any way to trick them into HSS? I should mention that I also own a Canon 580ex II, which does support HSS. I was thinking I could perhaps use that mounted on the camera to trigger the Yongnuo's, but as far as I can tell that would render the 560-TX useless as the flashes can't be controlled wirelessly when in S1 or S2.  I guess I could buy an ND filter, but as I have lenses with differing sizes, this feels like more of a pain in the ass.  Is there any hack I can pull off here that you guys know of?  Thanks!
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I have flash brand X and would like to know whether it will work with camera brand Y. What do I need to consider to determine whether the combination will work?  Other questions of relevance:
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I have 10 Canon 5DmkII cameras which I want to fire simultaneously... How can I accomplish this task repeatedly and reliably?  NOTE: Although I mention 10 cameras, it will be a 'super bonus' if the solution is scalable to n cameras...
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I just bought a Canon 2X extender and I always believed that it would only result in 2 stops' loss of light and not change the aperture.    However, when I tested this extender on a Canon 135mm f/2 lens, the maximum aperture I could set went down to F/4.  So it kind of confused me, because if I step down the aperture to f/5.6, is it actually setting the aperture to f/5.6 or f/2.8 (i.e., 1 stop below f/2)?
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I know there are quite a few posts out there about the famous "Press Shutter Release Button Again" error. But mine seems to be quite weird. I own a Nikon D3200 with the standard 18-55 mm lens. It works great and takes amazing pictures but only if my aperture is fully open (f/3.5). Once I close it to, for example, f/4 it shows me the "Press Shutter Release Button Again" error. The weird part though is that it will take a picture, but the picture will either be way too dark or way too bright depending on the lighting.   I checked and the mirror is moving without any issue and the aperture "arm" is also moving freely. I think it might be the lens? I am not sure about this though since I am quite new to DSLR cameras.   I doubt that this is normal, don't know if anybody has some advice?
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I have a Canon 700D and YN-568EX ii external flash that I am using in slave mode. But whenever I try to fire the built-in flash pops up automatically and fires itself. Is there any option to use only external flash?
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I just bought Nikon 18 - 55 mm f/3.5 - 5.6G VR AF-P DX Nikkor from .  When I connected it to my Nikon D5100, the autofocus didn't work. There was nothing about this from the original seller's website.  Is there anything I can do short of returning?
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I set my D7100 to M (manual), set the aperture to f5.6 and the shutter to 1/250. After I take a picture the shutter speed changes.  Is this normal?
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Why don't they make all DSLRs with an electronic shutter? Is it technically possible?  Surely this would allow easier syncing with flashes (rather than the usual 1/200s or 1/250s max).  I could even imagine a special RAW format that basically recorded all data from the CCD for, say, a second and then in software you could retrospectively shorten that time window. eg. only use data recorded in the first 1/100h of a second...  Or am I being stupid?
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I've been wondering why I've never seen any official specifications of the maximum allowed torque that can be exerted upon lens mounts. It seems to me like a very useful specification, but I can't seem to find it from any manufacturer.  indicates that there might be no specifications for Nikon mounts. Are there really no manufacturer that publish these specification of their mounts?
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I've been trying to take some long exposure shots at night with my Canon 450D. The problem I'm having is that I can't seem to get a shot in focus. The low light conditions prevent AF from working at all, nor is there enough light for me to get the focus correct by hand. I've tried through the viewfinder and the LCD, but they're both so dark I can't tell if I'm in focus or not.  Perhaps this is a lens issue? I have the 18-55mm ƒ/3.5 kit lens and the 50mm ƒ/1.8 EF lens; neither of them have focus markings, so I'm not sure if I'm hitting ∞ or if my lenses are even capable.  Thank you very much for the suggestions. I’m not able to shine a light, as I’m hoping to get landscapes and night sky shots, and I don’t have anything powerful enough to reflect back. I tried focusing with the 50mm ƒ/1.8 wide open, but I couldn't see anything. I don't think lens speed is going to make a difference.  It sounds like trial and error is my best shot here, which is unfortunate.  Side note: It sucks that the 450D has no way to display the focal length. This info is recorded in the image metadata, so it would seem like it should be available.  I have two more options that I came up with:   Set up during the evening, when there is enough light to focus, then take the shot at night. Potentially impractical due to time, but I see no reason it wouldn’t work. Use another camera. I tried again with my PowerShot S90, and got significantly better results. I was able to manually set the focus to infinity, and the wider angle / smaller sensor meant that I didn't have to worry as much about depth of field causing blur. While the S90 only allows for 15s exposures, CHDK removes that limitation.
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I have been using my dad's old Metz mecablitz 18 B1 flash for a while with my Canon 7D and had no trouble with it, but just received some advice from a friend that using old flashes can fry the camera. Is this true? And if so, is there a safe way to use it (I'm trying to avoid having to buy a new flash – but also would like not to destroy my camera). The flash takes 3 x AA batteries and has a single hotshoe connection.
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What exactly is flash sync speed and should it be a factor in a buying decision?
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I currently have a Yongnuo YN560-TX trigger and a Yongnuo YN-560 Mark III. I would like to get a iTTL flash that also works with remote triggering.  How compatible are are different flash brands (Neewer, Yongnuo, etc.) when it comes to things like setting zoom, etc. ?
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I just bought a Nikon d5100 and everything seems to be working pretty fine. Except for the fact that I am unable to preview the shot I'm willing to take. When I turn my LCD it shows me what the camera is seeing. But when I change settings like iso, f stop etc and try to see how it has affected my frame, the LCD just doesn't show it. It still shows me what my camera is seeing.  If there are any adjustments I need to make in the settings please let me now. I would like to see how the change in iso or f stops would affect my image even before I click like in Canon, on my LCD. The reason I'm stressing on the same point again and again is because someone asked this question earlier and most of the people who replied didn't understand the question.
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I'm trying to get an idea of which Yongnuo flash will fit my requirements. I'd like to have a flash to pair with my SB-900 with TTL support for use both on and off camera (Nikon CLS-compatible). My camera is the Nikon D7000.  Power and flash zooming are not really important to me.  I'd be much happier with answers that let me understand Yongnuo's flash lineup. Thank you in advance!
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I can't figure out how to turn on the Bluetooth on my Nikon D5600. I have updated the firmware to the latest 1.01 and still the same problem.   Bluetooth is dimmed out on the camera and will not turn on. I get an error message saying, "This option is not available at current settings or in the camera's current state".  I have tried everything I can think of and no go. I can't find help for this problem anywhere on the internet and still no reply from Nikon.  How do I turn on my camera's Bluetooth?