nikonians

Even though we ARE Nikon lovers,we are NOT affiliated with Nikon Corp. in any way.


Sign up Login
Home Forums Articles Galleries News Workshops Shop Recommended
members
All members Wiki Contests Vouchers Apps Newsletter THE NIKONIAN™ Magazines Podcasts Fundraising

New CLS Preflash Sequence Images

HBB

Phoenix, US
8641 posts

Click to send email to this author Click to send private message to this author

"RE: New CLS Preflash Sequence Images"

HBB Moderator Hal is an expert in several areas, including CLS Awarded for his excellent article contributions to the Resources. Charter Member
Thu 26-Feb-09 11:29 PM

Neal:

Nice to see you again. Hope all is well.

Agreed: Three is probably a practical limit for current CLS technology. At some point, with more than three remote groups plus an on-camera master engaged, the assorted preflash circuit delays will become intolerable as the milliseconds add up. Faster on-camera and remote unit circuitry and related technology are possible, but at what cost? At some point, consumers will refuse to pay it.

Without the four channel recording oscilloscope that I keep talking about, I am limited to the approximate scaling mentioned earlier in this thread for timing analysis, based on the 1/30 sec shutter time. The unknown here is how constant is my rotational velocity on the D2X capturing the preflash and image capture pulses.

I believe the preflash sequence functions asynchronously, given that a pulse from the on-camera master/commander is used to initiate the exchange with each remote group. The only truly synchronous interval appears to be that between the trailing edge of the image capture pulse and the simultaneous firing of the master and all remotes. This interval is short enough, that very slight differences between remote units (microseconds?) are not a problem.

Think how far we have come from the days of flash powder!

Regards,

HBB in Phoenix, Arizona
Nikonian Team Member

Go here for a list of membership upgrade benefits.

Photography is a journey with no conceivable destination.

Pinned topic New CLS Preflash Sequence Images [View all] , HBB Moderator Hal is an expert in several areas, including CLS Awarded for his excellent article contributions to the Resources. , Thu 15-Jan-09 07:25 PM
Subject
ID
Reply message RE: New CLS Preflash Sequence Images
1
Reply message RE: New CLS Preflash Sequence Images
2
     Reply message RE: New CLS Preflash Sequence Images
3
Reply message RE: New CLS Preflash Sequence Images
4
Reply message RE: New CLS Preflash Sequence Images
5
     Reply message RE: New CLS Preflash Sequence Images
6
Reply message RE: New CLS Preflash Sequence Images
7
Reply message RE: New CLS Preflash Sequence Images
8
     Reply message RE: New CLS Preflash Sequence Images
9
          Reply message RE: New CLS Preflash Sequence Images
10
Reply message RE: New CLS Preflash Sequence Images
11
Reply message RE: New CLS Preflash Sequence Images
12
     Reply message RE: New CLS Preflash Sequence Images
13
          Reply message RE: New CLS Preflash Sequence Images
14
               Reply message RE: New CLS Preflash Sequence Images
15
Reply message RE: New CLS Preflash Sequence Images
16
Reply message RE: New CLS Preflash Sequence Images
17
     Reply message RE: New CLS Preflash Sequence Images
18
     Reply message RE: New CLS Preflash Sequence Images
19
     Reply message RE: New CLS Preflash Sequence Images
20
     Reply message RE: New CLS Preflash Sequence Images
21
     Reply message RE: New CLS Preflash Sequence Images
22
     Reply message RE: New CLS Preflash Sequence Images
46
          Reply message RE: New CLS Preflash Sequence Images
47
Reply message RE: New CLS Preflash Sequence Images
23
Reply message RE: New CLS Preflash Sequence Images
24
Reply message RE: New CLS Preflash Sequence Images
25
Reply message RE: New CLS Preflash Sequence Images
26
     Reply message RE: New CLS Preflash Sequence Images
27
     Reply message RE: New CLS Preflash Sequence Images
29
     Reply message RE: New CLS Preflash Sequence Images
28
          Reply message RE: New CLS Preflash Sequence Images
30
               Reply message RE: New CLS Preflash Sequence Images
31
                    Reply message RE: New CLS Preflash Sequence Images
32
                         Reply message RE: New CLS Preflash Sequence Images
33
                              Reply message RE: New CLS Preflash Sequence Images
34
                                   Reply message RE: New CLS Preflash Sequence Images
35
                                        Reply message RE: New CLS Preflash Sequence Images
36
Reply message RE: New CLS Preflash Sequence Images
37
Reply message RE: New CLS Preflash Sequence Images
38
     Reply message RE: New CLS Preflash Sequence Images
39
          Reply message RE: New CLS Preflash Sequence Images
40
               Reply message RE: New CLS Preflash Sequence Images
41
                    Reply message RE: New CLS Preflash Sequence Images
42
                         Reply message RE: New CLS Preflash Sequence Images
43
                              Reply message RE: New CLS Preflash Sequence Images
44
                                   Reply message RE: New CLS Preflash Sequence Images
45
Reply message RE: New CLS Preflash Sequence Images
48
Reply message RE: New CLS Preflash Sequence Images
49
     Reply message RE: New CLS Preflash Sequence Images
50
     Reply message RE: New CLS Preflash Sequence Images
52
     Reply message RE: New CLS Preflash Sequence Images
51
     Reply message RE: New CLS Preflash Sequence Images
54
          Reply message RE: New CLS Preflash Sequence Images
55
     Reply message RE: New CLS Preflash Sequence Images
53
          Reply message RE: New CLS Preflash Sequence Images
56
               Reply message RE: New CLS Preflash Sequence Images
57
                    Reply message RE: New CLS Preflash Sequence Images
58
                    Reply message RE: New CLS Preflash Sequence Images
59
                         Reply message RE: New CLS Preflash Sequence Images
60
                         Reply message RE: New CLS Preflash Sequence Images
62
                              Reply message RE: New CLS Preflash Sequence Images
63
                              Reply message RE: New CLS Preflash Sequence Images
64
                              Reply message RE: New CLS Preflash Sequence Images
67
                                   Reply message RE: New CLS Preflash Sequence Images
68
                                   Reply message RE: New CLS Preflash Sequence Images
72
                              Reply message RE: New CLS Preflash Sequence Images
74
                              Reply message RE: New CLS Preflash Sequence Images
65
                                   Reply message RE: New CLS Preflash Sequence Images
66
                                        Reply message RE: New CLS Preflash Sequence Images
69
                                        Reply message RE: New CLS Preflash Sequence Images
70
                                        Reply message RE: New CLS Preflash Sequence Images
71
                                        Reply message RE: New CLS Preflash Sequence Images
73
                                        Reply message RE: New CLS Preflash Sequence Images
75
                                             Reply message RE: New CLS Preflash Sequence Images
76
                                             Reply message RE: New CLS Preflash Sequence Images
77
                                             Reply message RE: New CLS Preflash Sequence Images
78
                                             Reply message RE: New CLS Preflash Sequence Images
79
                         Reply message RE: New CLS Preflash Sequence Images
61
                              Reply message RE: New CLS Preflash Sequence Images
80
                                   Reply message RE: New CLS Preflash Sequence Images
81
                                        Reply message RE: New CLS Preflash Sequence Images
82
                                             Reply message RE: New CLS Preflash Sequence Images
83
                                                  Reply message RE: New CLS Preflash Sequence Images
84
                                                  Reply message RE: New CLS Preflash Sequence Images
85
                                                  Reply message RE: New CLS Preflash Sequence Images
86
                                                  Reply message RE: New CLS Preflash Sequence Images
87
                                                  Reply message RE: New CLS Preflash Sequence Images
88
Reply message RE: New CLS Preflash Sequence Images
89
Reply message RE: New CLS Preflash Sequence Images
90
Reply message RE: New CLS Preflash Sequence Images
91
     Reply message RE: New CLS Preflash Sequence Images
92
          Reply message RE: New CLS Preflash Sequence Images
93
          Reply message RE: New CLS Preflash Sequence Images
94
          Reply message RE: New CLS Preflash Sequence Images
95
               Reply message RE: New CLS Preflash Sequence Images
96
Reply message RE: New CLS Preflash Sequence Images
97
Reply message RE: New CLS Preflash Sequence Images
98