SteB wrote in post #18458438
I appreciate that most people won't have the MT24EX bracket. However, I've just identified the problem with the YN24EX bracket, and the problem is not the bracket itself, but the adapter rings. I've also got a Yongnuou YN14EX, which I designed the macro lite/ring lite diffuser for. There was no problem with that rotating, so I was just trying to compare the two to work out why the YN24EX bracket rotates and the YN14EX doesn't. When I dropped the adapter ring from the YN14EX into the YN24EX bracket, it was hey presto problem solved. On close examination the reason for this was immediately self-evident. The YN14EX adapter rings are very slightly thicker, or the YN24EX adapter rings slightly thinner, depending on how you want to look at it. I've only got some cheapo digital calipers so I couldn't get a precise reading as you'd need a micrometer, which I don't have to get that. However, it confirmed that the adapters sent with the YN24EX are ever so slightly thinner than those supplied with the YN14EX.
These adapter rings are identical to Cokin P filter holder adapter rings, which are pretty cheap. In other words you just need some new adapter rings of the right thickness. The rotation doesn't seem to be a design fault. They were probably designed it with the thicker adapter ring, by the adapter rings they shipped them with were slightly thinner than usual.
I haven't measured them myself but yes your are probably right about the ring being thinner. I'll have to see if I can make a new ring that is still strong enough otherwise I'll think of another way of tightening it up. If people want to buy these diffusers from me then I wouldn't expect them to have to buy something else so I'll try and supply something with them to fix the problem.
I hope you don't mind me making a few suggestions.
1) For field macro photography you could probably do with the option of a smaller diffuser face. This is because whilst these will give good lighting they will have similar limitations to the lens mounted light tent type diffuser such as my original cup diffuser. That is they are more likely to scare some insects (it is not such a problem as people tend to think as long as you are aware of it - there are several solutions such as shooting against the sun, so it is shining underneath the filter, and or lifting it up and putting it down over the subject - doing it slowly, increments), and they are likely to get in the way with some vegetation and some surface structure.
Ideally I'd rather not make the face any smaller as diffusion would reduce. I've also been testing these in the field and they don't scare the bugs any worse than any other diffuser I have tried so, for now I think the size is ok.
2) I'd design the diffusers so they fit together in the middle and give a seamless catchlight in the eyes of jumping spiders etc.
I have looked at this but that is not possible to do with 2 separate diffusers unless you restrict the angles of the heads, which you don't want to do because you need to adjust the angle for different magnifications. You can adjust the shape of the catch lights with the oval diffuser faces in with the kit, I'll also be doing other shapes for more interesting reflections
3) Ideally the diffuser housings and diffuser faces would be curved. I appreciate this may make them more difficult to design and possibly print.
I've not found the need to make them curved so I've not designed any that way. As I've mentioned before, I don't want to over diffuse my subjects so wrapping them in light is the opposite of what I want to achieve.
4) I'd change the design of those bounce flash shoes, and make them with adjustable height. My idea for this would simply be a bar with a clamp for the female part of cold shoe. It may not need to have a swivel part on this, and just use the swivelling mechanism on the flash to tilt the flash heads up and down. Certainly with these diffuser prototypes you need the option of lifting them up higher. In other words the bar part would just have a male cold shoe at one end, and the clamp holding the female cold shoe would slide up and down the bar. It would be great if the female cold shoe holder could have a mechanism where it clicks into place like with the flash bracket.
I have an idea for making them flexible rather than just being rotatable/height adjustable, I just need to draw up my design and test it out. These would be more versatile than just having adjustable rotation/height.
As I say these are just general suggestions, which you might not think are worthwhile yourself, would make the design and printing too difficult etc. I also appreciate that possibly you are designing these diffusers more from the perspective of "studio" macro photography, stacking, rather than field use. One problem with the field use of diffusers are flat surfaces such as the ground, or the top of wooden posts or stumps for photographing springtails, jumping spiders etc. They can limit how close you can get, or the angle you can get. This is why being able to raise the flash heads up would be useful, to give more clearance.
When using the YN24EX in the field I've found it better to put the right flash on the left hand side and vica versa. This is because the flash head cables come out of the wrong side of the head, droop down and tend to get tangled in vegetation etc. I rarely use power ratios, but if you do, you just have to remember they're the opposite way round.
Yes any suggestion is appreciated. These particular diffusers have been designed for field use more than stacking but I also get very good results when I use them to stack, especially when used my my extensions. You can also twist the flash heads to provide a nice top/flat diffuser from above without the extensions. I've not had any problems using them in the field up to 5x magnification but it does depend on the subject position. I've had more trouble getting the camera in position due to the adaptor ring sticking out at the bottom,especially when the subject is on a flat, hard surface like you say. There is not much you ca do about this though.
Good tip about the cables. Wireless would be great if it was reliable enough!
In addition, as regards the lens mounted light tent type diffuser. I've found it more practical if they are actually conical i.e. wider at the end than where they attach to the lens. My diffuser for the YN14EX is now like that and it makes it so much easier to get close to the subject.
Like I said above, I've not really had any problems with getting close enough to subjects, you just have to angle them at the correct angle.