I feel that the driver could be the issue with my MF-01. The inital problem was uneveness in one bank, before becoming a continuous Turbo issue with the same bank. In very brief testing, I have been able to get it to operate as it initially did. However, after only one cycle through the modes, the bank returns to itās current constant Turbo state.
So, my lightās issue does no appear to be grounding/shorting, as JasonWW speculated. Just a more extreme case of the driver issue.
I have yet to receive any further communication from BG. So, I continue to waitā¦and wait, and wait, and wait.
Forgive me, all. Iām really not trying to be a buzzkill on here. Itās just that itās a little more than frustrating that after a week, my MF-01 still sits idle, and I still have no resolution for my light.
What did Banggood say? Did they want you to send the light back for repair? Did they offer you a partial refund and you keep the light? Have they ignored you?
You have an interesting device. Thank you for posting :+1:
Compared to sunlight, 219C seems to be higher in color temperature.
Peopleās eyes get used to it, so it looks different from the one you see at night at different impressions.
The last valid response from BG, is that that they had contacted the MFG and were waiting for a reply. Freeme stated that the head of the MF-01 project would contact me soon, but that was two days ago.
2 days? Iād wait at least 2 weeks and if they got back to me before then, Iād consider it a win.
Itās possible they might want you to send the light back to them and they send you a new one. So maybe youāll have a working light in 6 to 8 weeks maybe? I would not be holding my breath.
It was sitting in one of the many cardboard boxes I never opened for about 3 years, since my last move in a new apartment.
I really donāt know if it is still accurate but I used it a lot, long time ago with a toyo-view D45M and an old rolleiflex, both almost beated to deathā¦but all is a matter of good lenses. Japaneses and germans were the best at making great tools, lenses, cameras.
I tried to measure the temperature of the MF-01ās beam but there is too much variations over the beam to have something relevant.
Hereās mine in lowest mode.
There are some slight differences (that I really donāt care) in tint and brightness but nothing that follow the pattern of the 3 banks of 8 LEDs. Probably only the small difference/tolerance within a batch of LEDs. Or two different batches mixed before soldering them.
Left / right 219C middle XP-G3(CW) WB5000K
In Japan it is said that the color temperature during the day is 5000K to 5500K in the daytime.
It may be correct that the camera is set to 5000K and 219C appears in white.
But actually you are looking for a color like this oneā¦.
I have used some Ā«knownĀ» lights, doing ceiling-bounce (over 1 meter), to build up a
possible reference table (in lumens for MF-01) using a conversion factor of 26.47. (This factor is not a calibrated value.)
I have used different battery types for this testing.
Hope I am close with my numbers.!!??
^ Thanks a lot hunter1! Any chance anyone can do some measurements with cells at, say 3.9V and 3.4V or so? Just for an indication how well turbo output is maintained. Thanks!