[pigpig2000]

safty lock，可已刪咗佢。
我。。。。。。。冇刪到，
怕死 ^_^

[Alfani]

Have you tried updating to firmware v5.02 for the SB900?

[pigpig2000]

咁就真係冇，我有試過tune細D個output，但係會唔夠光，重衰。
一般同屋企人影相真係冇乜試過overheat，但有重要場合通常都會，
所以有必要時我會帶兩支燈。 ^_^

[pigpig2000]

有好多人真係disable 個 cutoff都冇事，
可能我怕死o者，有冇興趣試吓？ ^_^

[pigpig2000]

聽日話你g，我都唔記得 ^_^
不過肯定說明書見過。

[pigpig2000]

hold注個ok制一陣就會入咗menu，跟注用個轉盤搵，個function懈差唔多1/3咁上下。你會見個on off。
想搏嘅話就刪咗佢。 ^_^

[real2781]

SB-900 overheating

Before getting started or jumping into the conclusion, SB-900 overheating is not a design flaw because it is simply a human error.
The SB-900's firmware update 5.0.2 Does Not address and /or fix the overheating issue, it quotes,

1. With uninterrupted shooting with the SB-900 set to I-TTL mode, imaes captured just before the flash ceased firing were sometimes
overexosed. This issue has been resolved. By resolving this issue, metering precision has been further increased and the
number of times the flash fires has also been increased.

2. When the SB-900, set to TTL auto flash, it used with a camera supporting the Niken creative Lighting System (CLS), flash mode
automatically chnages to A mode according to camera communication status. That flash mode was previously maintained, but it has
been modified so that TTL auto flash mode is restored once the SB-900 again recognizes the camera as a CLS-compatible camera.

Problem Nos. 1
Batteries
Choosing the batteries is one of the most common human errors that leads to SB-900 overheating. Since there are primary (non-rechargeable) and
rechargeable batteries, one must understand the limitations coming form rechargeable batteries. The rechargeable batteries have a limited
voltage of 1.2V (Volts), while primary batteries have a voltage of 1.5V. 1.2V is lower than the voltage of standard non-rechargeable cells
which result in problems powering up the SB-900 due to its slow/low current compared to the fast/high current available in primary batteries.

In the simpler terms,
Pirmary (non-rechargeable) batteries have the voltage of 1.5V.
Rechargeable batteries have the voltage of 1.2V.

The mAh (milliAmpere/hour) does NOT have anything to do with the voltage rate - it is simply the measurement of battery capacity
(as known as battery life). Most of primary batteries have a mAh range of 1,700 mAh to 3,000 mAh while rechargeable batteries have a mAh
range of 500mAh to 1,000 mAh (for NiCd, or Nickel-Cadimium) and 1,300mAh to 2,900 mAh (for NiMh, or Nickle-Metal hydride). Also,
rechargeable batteries suffer from self-discharge, where the batteries lost the charge when stored/not in use. In the simpler terms,
rechargeable batteries requires to be replaced with one ones within 60 days from the purchase. Compare the recycling time of primary and
rechargeable batteries, firing at M-1/1 (as known as Full Power).

As the conclusion, primary battery delivers the fastest recycling time to the flash. With the slow recycling time coming from rechargeable
batteries, if the user continues shooting/firing without allowing the batteries to recycle. The batteries will overheat, which result in SB-900 overheating.

Solution Nos.1
1) Use primary batteries, such as (Alkaline)
A. Duracell coppertop (Alkaline)
B. Energizer Ultimate Advanced Formula (Lithium)
C. Kodak MAX (Alkaline)

2) AVOID mixing different brand primary and/or rechargeable batteries in the SB-900.

3) TEST the batteries first before inserting and using.

Note:
The user could use rechargeable batteries, however, it is NOT recommended when using the SB-900 heavily such as firing the camera + Flash continously
up to 200 or more images per hour.

[real2781]

SB-900 overheating

Before getting started or jumping into the conclusion, SB-900 overheating is not a design flaw because it is simply a human error.
The SB-900's firmware update 5.0.2 Does Not address and /or fix the overheating issue, it quotes,

1. With uninterrupted shooting with the SB-900 set to I-TTL mode, imaes captured just before the flash ceased firing were sometimes
overexosed. This issue has been resolved. By resolving this issue, metering precision has been further increased and the
number of times the flash fires has also been increased.

2. When the SB-900, set to TTL auto flash, it used with a camera supporting the Niken creative Lighting System (CLS), flash mode
automatically chnages to A mode according to camera communication status. That flash mode was previously maintained, but it has
been modified so that TTL auto flash mode is restored once the SB-900 again recognizes the camera as a CLS-compatible camera.

Problem Nos. 1
Batteries
Choosing the batteries is one of the most common human errors that leads to SB-900 overheating. Since there are primary (non-rechargeable) and
rechargeable batteries, one must understand the limitations coming form rechargeable batteries. The rechargeable batteries have a limited
voltage of 1.2V (Volts), while primary batteries have a voltage of 1.5V. 1.2V is lower than the voltage of standard non-rechargeable cells
which result in problems powering up the SB-900 due to its slow/low current compared to the fast/high current available in primary batteries.

In the simpler terms,
Pirmary (non-rechargeable) batteries have the voltage of 1.5V.
Rechargeable batteries have the voltage of 1.2V.

The mAh (milliAmpere/hour) does NOT have anything to do with the voltage rate - it is simply the measurement of battery capacity
(as known as battery life). Most of primary batteries have a mAh range of 1,700 mAh to 3,000 mAh while rechargeable batteries have a mAh
range of 500mAh to 1,000 mAh (for NiCd, or Nickel-Cadimium) and 1,300mAh to 2,900 mAh (for NiMh, or Nickle-Metal hydride). Also,
rechargeable batteries suffer from self-discharge, where the batteries lost the charge when stored/not in use. In the simpler terms,
rechargeable batteries requires to be replaced with one ones within 60 days from the purchase. Compare the recycling time of primary and
rechargeable batteries, firing at M-1/1 (as known as Full Power).

As the conclusion, primary battery delivers the fastest recycling time to the flash. With the slow recycling time coming from rechargeable
batteries, if the user continues shooting/firing without allowing the batteries to recycle. The batteries will overheat, which result in SB-900 overheating.

Solution Nos.1
1) Use primary batteries, such as (Alkaline)
A. Duracell coppertop (Alkaline)
B. Energizer Ultimate Advanced Formula (Lithium)
C. Kodak MAX (Alkaline)

2) AVOID mixing different brand primary and/or rechargeable batteries in the SB-900.

3) TEST the batteries first before inserting and using.

Note:
The user could use rechargeable batteries, however, it is NOT recommended when using the SB-900 heavily such as firing the camera + Flash continously
up to 200 or more images per hour.