Can pre-flashes be disabled? (Nikon SB-600 & Phottix Odin)

Hi, I think not.

I shoot Canon so I can't be definitive re Nikon, but on our side, the redundant pre-flash in M cannot be removed. Usually it's not a problem - and the power used is minimal.

Interestingly, Phottix's Mitros + for Canon does not pre-flash in M - maybe the same applies for Nikon?

If your bodies have an 'FV Lock' function (FEL on Canons), that discharges any pre-flash in M early and makes metering the 'capture-flash' easy. Phottix have an alternate metering method, depending on which firmware you are running - I much prefer the FEL technique.

I still love my Odins ..

Cheers

I assume you mean the 'Wide Area AF Assist Illuminator' (or basically AF preflash assistance with the red rovered light on the front of the flash unit))?

Accoording to page 53 in the manual https://support.nikonusa.com/app/answers/detail/a_id/13455/~/speedlight-sb-600-instruction-manual

you can switch that of in the Custom Settings

I suspect that ScratchDisk may have been most on target here... I am referring to the group of three quick flash bursts that preceed the main flash that occurrs during exposure. I am not referring to the red light that puts a "grid" on the subject.

. . . . you should be able to turn that off OK.

However if you get into using an external flashmeter while controlling your remote SBs with the Odin TCU set to M, then re-read my post above. Good luck.

will do. thank you, sir.