p.2 #1 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Akoloskov wrote:
Hummingbird shooters: its hard to beat little battery powered strobes because of it's size:-) Glad I am a studio photographer:-)
You're assuming their setups aren't studios.
They have elaborate setups on outdoor porches, fake backdrops, "bait" for the hummingbirds to come visit their feeders, triggers to detect movement and fire the camera they've left out...
Here's a simpler setup: http://www.flickr.com/photos/annpatt/2075982891/
p.2 #3 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Akoloskov wrote:
I might be really stupid, as I can't understand WHY the same lens, same aperture and same shutter speed on the SAME subject in one case has aberration and in another does not.
My understanding is that this is a color difference during the impulse, not aberration: look at speedlite test, there is no aberration...
I don't think you're stupid. I think the same thing you do; that it's due to the changing color of the light as the white writing moves across the various sensels.
If then white letters weren't moving they'd look pure white because they'd be exposed to the full impulse at the same sensels.
p.2 #4 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Let's assume that everything is the same in his demo: same camera, lens, target and rotation speed, same exposure, same Einstein, and the only differences are that for one photo he set the Einstein to Action mode (which puts a premium on shortness of flash duration over color control) and that for the other he set the Einstein to Color mode but changed the energy setting to more or less equalize flash duration with the Action mode sample, then what has changed? Paul is the engineer here but given my limited knowledge of electricity, it seems like either the voltage or the amperage or possibly both of the energy discharge has changed along with the energy measured in watt-seconds. I suspect that the Einstein is programmed to better regulate, when in color mode, the voltage and/or amperage of the capacitor discharge at different w-s settings, hence the lack of color shift at bothends of the discharge cycle.
p.2 #5 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Akoloskov wrote:
I might be really stupid, as I can't understand WHY the same lens, same aperture and same shutter speed on the SAME subject in one case has aberration and in another does not.
My understanding is that this is a color difference during the impulse, not aberration: look at speedlite test, there is no aberration...
I really want to see how profoto and broncolor will manage this test..
Hummingbird shooters: its hard to beat little battery powered strobes because of it's size:-) Glad I am a studio photographer:-)
You're absolutely correct. Both Rob Galbraith and I have done these same tests (I use a calibrated spinning wheel of my design). We have ruled out chromatic aberrations. We also noted the visual lack of the color banding on speedlights and I have discussed this with our tube supplier. A linear tube (speedlight) processing only 1/10 the power turns on and off much more rapidly . . . . the aberrations are still there but for a much shorter time so they are not readily visible.
Here is yet another link showing color shift and action stopping of Broncolor and Profoto packs. Note the color shift and flash durations. The author was puzzled by the lack of action stopping of the Profoto . . . quite simply, Profoto does not have IGBT tube control as does Bron and Einstein, thus has longer t.1 times and more color shift. http://biwastudios.blogspot.com/2010/02/broncolor-scoroa4-vs-profoto-8a.html
As for speedlights and t.1 times . . . indeed, speedlights can reach the 1/28,000 t.1 range . . . but at 1/2WS. What is important is flash duration vs power levels. Einstein and Grafit can provide very fast durations at significant power levels where speedlights cannot. Finally, note Grafit's minimum t.1 time is 1/8000 while Einstein's is 1/13,500. Both feature constant color modes.
I have plans to rent a Profoto 8 and a Grafit and do comparative testing of these against Einstein. I bought about the only Bron flash duration meter in existence, but found it rather iffy and inaccurate. Likely why it's long been discontinued.
p.2 #8 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
I mentioned the power output earlier in this thread . . . the Grafit at 1/4 power is roughly equal to Einstein in WS and t.1 times according to one independent link test posted earlier in this thread. Einstein reaches 1/10,000 t.1 at about 50WS, I have no chart of Grafit duration VS power, but it never gets faster than 1/8000. There may be power levels between 40 and 160WS where Grafit is faster . . . you're asking for info that I don't have and implying I am not telling the whole story. I am telling what I know . . . if others know more, they should speak up here.
I have never stated one system is faster or better than the other, or that there is anything wrong with Grafit . . . just stated the comparisons other have made. Instead of accusations against my posts and equipment, how about some supported opposing viewpoints and specs? We're not comparing apples to apples here . . . prospective customers should really gather a better understanding of their wants and needs and budgets and intended uses before buying anything.
Better than attempting to turn a constructive thread into the usual FM slamfest.
p.2 #10 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Paul Buff wrote:
I mentioned the power output earlier in this thread . . . the Grafit at 1/4 power is roughly equal to Einstein in WS and t.1 times according to one independent link test posted earlier in this thread. Einstein reaches 1/10,000 t.1 at about 50WS, I have no chart of Grafit duration VS power, but it never gets faster than 1/8000. There may be power levels between 40 and 160WS where Grafit is faster . . . you're asking for info that I don't have and implying I am not telling the whole story. I am telling what I know . . . if others know more, they should speak up here.
I have never stated one system is faster or better than the other, or that there is anything wrong with Grafit . . . just stated the comparisons other have made. Instead of accusations against my posts and equipment, how about some supported opposing viewpoints and specs? We're not comparing apples to apples here . . . prospective customers should really gather a better understanding of their wants and needs and budgets and intended uses before buying anything.
Oh yeah that was just a note! Just before the "note" you wrote -What is important is flash duration vs power levels -(!) Did you or I write important? The sentence before is even better with 28000s at 1/2 power for speedlights! So yes, in the end, you do mention some power output and ignore the other ones while throwing numbers that are not comparable since different outputs from different products. I'm not saying you don't know your stuff but you sure know how to omit details.
p.2 #11 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Give me a break Todd. I clearly said speedlights can deliver 1/28,000 at 1/2WS . . . you translated that to "1/2 Power", Bit of difference between 1/2 WS and 30WS. Please get you own fact straight instead of adding nothing here but slams and lack of accuracy.
I believe I also clearly addressed flash duration VS power level two posts up from this one.
Your statement "I'm not saying you don't know your stuff but you sure know how to omit details." is 100% BS and merely shows a negative agenda, which you adopt every time here.
p.2 #12 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Paul Buff wrote:
Give me a break Todd. I clearly said speedlights can deliver 1/28,000 at 1/2WS . . . you translated that to "1/2 Power", Bit of difference between 1/2 WS and 30WS. Please get you own fact straight instead of adding nothing here but slams and lack of accuracy.
I believe I also clearly addressed flash duration VS power level two posts up from this one.
Your statement "I'm not saying you don't know your stuff but you sure know how to omit details." is 100% BS and merely shows a negative agenda, which you adopt every time here.
That was a typing mistake and you know it, but I'm OK if that's the best you can do
p.2 #13 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Paul Buff wrote:
Sure . . . but what camera can do that?
I was thinking along the lines of Pocket Wizard's HyperSync. I'm not too familiar with how it works, but if the exposure time of a photo was short (e.g. 1/4000s), and the sensor was exposed during the crest only, giving it both a constant color temp and flash intensity, wouldn't that work? Would something like this work with IGBT flashes?
And I'm sure this has been asked before, but is HSS possible with Einsteins or the Grafits?
p.2 #15 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Todd56 wrote:
That was a typing mistake and you know it, but I'm OK if that's the best you can do
No Todd, I don't know it was a typo and I don't appreciate you telling me what I know and don't know.
If it was a typo, it makes everything else you wrote irrelevant. This thread was good and constructive and I provided nothing but accurate information and everything I know on the subject, with no bias or omissions.
You, on the other had, are doing nothing here but making crap out of a good thread, and I'm pretty sick of your garbage.
Other members and Fred, if you want to allow this, go ahead and let this guy ruin the forum and I'll leave.
p.2 #16 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Here is complaint message I just sent to Fred about Todd56.
Fred,
"get rid of this guy or me. I try to be constructive and you leave troublemakers like this guys."
I You want me gone, do nothing about this, if you want my participation here, tell Fred to clean up his house of haters. I have better things to do than baby sit whiners with support from real members.
p.2 #17 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
I You want ?
You can always skip as they say and not reply or is it a game?
Fred, last time I got involved with this guy was when he treated all photographers who ever left their strobe cap melt once of being pretty much unprofessional. Even Ellis who is a field guy too had to disagree with his comment.
I think manufacturers could be welcome, but they obviously know little about the photographer side and should rather learn than teach and also accept it when they are wrong without ringing your bell once a year. There is something weird about people who have to push the complaint button so regularly. You won't see me do that for sure. I pointed his paragraph was not consistent and now he wants me out. Weird.
p.2 #18 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
Todd56 I was enjoying this thread until you showed up. It always seem to be someone trying to shit on Paul. I don't get it at all. Seriously, I don't get it.
p.2 #19 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
My take... if you leave a strobe cap on... well that's just plain stupid. Unprofessional? Eh, I like to think humans make mistakes and it's fun.
Next, to complain about things, to go out of your way to be negative. Well I call that just irresponsible. Take it for what any one wants. I really don't care.
I come here to learn not to watch itty bitty people with agendas destroy a forum that was founded on the precept of knowledge.
I find the banter a bit juvenille and I won't mention from whom. I have my own thoughts on who and where having watched for years.
Meanwhile I'll just sit back and read. Some peoples posts have been censored because the contribute little to the conversation. Again I'm not naming names.
p.2 #20 · Paul C. Buff Einstein 640 in-depth flash duration test: action v.s constant color mode
pjbuehner wrote:
Todd56 I was enjoying this thread until you showed up. It always seem to be someone trying to shit on Paul. I don't get it at all. Seriously, I don't get it.
Lots of people learn from more than one source, that is if they can think for themselves! Was it on this very forum that someone announced potential overheating issues 6 month ahead of any one? It ended up not being good for the owner or the future users. I think the all thing could have been avoided... but may be you were not affected by the delay like many others did?
