4th October 2010, 11:28 AM
Reprogram flash unit.
Have a problem i need to solve and wonder if you guys know a solution to it.
I've got a macro ring flash (an opteka RL-600 ETTL), and ocassionally use it as a fill flash. The problem with this is when it is mounted onto a lens that is longer than 85mm (typically a 70-200) the flash unit will usually stall (won't fire).
When the flash is initially turned on and lens already set at 200mm, the unit will still fire. (Flash unit however will display 85mm)
I zoom to 70mm, and the unit fires off as expected.
When i zoom back to 200mm, the flash will not fire and the unit stalls. Display will only show which mode i am using.(ETTL, manual etc). Zooming back to 70mm will not fix it and has to be turned off and on again for it to work.
FYI, i usually shoot in manual and at 1/8th power.
Apparently the flash has an upper limit of 85mm. Is there a way to by-pass this?