m&m

Any thoughts on the Toshiba tecra A7 or A6.  They good on paper
They can be customized with 7200 hard drives.
They have hard drive protection for bumps.
Decent screens.
Duo processors

The big problem is the A7 (15.4”) has an integrated video card.  How much will this effect processing photos?  I do tend to want the 15” over the 14”

I can't seem to find how many enteries per catigory are allowed?

Thanks, mark

I ended up going with the Seacam and have never looked back.  It is a great housing with zero issues.  The view finders are the envey of many.  Once you use them, you will understand how nice they are.  As for stobes, i have been very happy with ds125s.  There are some issues with flooding on these strobes; however, Ike has been great about repairs.   I never used a Subal housing.  But i have seen them.  i am happy i got the seacam.

Good luck, mark

William stated that “Canon's flash, with high speed sync, when set to high speed sync more or less emits a constant beem of light long enough for the slit to move all the way across the frame.”

There is something here that I am just not getting. The duration of the Canon flash being longer for a shorter shutter speed doesn’t seem to make sense to me. If the strobe (ds125) takes 250th of second to dump, and the shutter is only taking 500th of second to move across the plan, then the strobe is firing throughout the duration of the curtain moving and then some. I would think that just the amount of overall light is cut down hitting the sensor. Unless the real problem is the shutter starts moving before the flash fires. Then I could see some of the frame getting clipped off.

Now if this is the case, how does Canon achieve high speed sync? Do they delay the shutter opening? Are all flash’s created equally in terms of how fast they can start to fire.

Thanks, mark