Search results for 'sensor cleaning' - page 552
Bounce type flashgun
[quote:beb3601419="I"] I came to the tentative conclusion that the angle of view seen by the sensor could, if the lens focal length was too long, be too great, and therefore respond to more reflected light than gets in through the lens. Is this likely to be right? No. Please elaborate :)[/quot...
Posted by George Lazarette on 10/07/2007 - 08:18
Bounce type flashgun
The sensor is a light meter, and it measures the light, then cuts off the power to the flash. Indeed. And presumably, the flash-sensor cuts off the flash when it's measured a total amount of reflected light, returning to it from whatever its field of view happens to be. If there's a signific...
Posted by ChrisA on 10/07/2007 - 08:29
Bounce type flashgun
The sensor is a light meter, and it measures the light, then cuts off the power to the flash. Indeed. And presumably, the flash-sensor cuts off the flash when it's measured a total amount of reflected light, returning to it from whatever its field of view happens to be. If there's a signific...
Posted by George Lazarette on 10/07/2007 - 09:09
Digital SLR and P-TTL flash guide
Simon, All metering for P-TTL, as well as for non-flash metering, is performed through electronics housed in the top of the pentaprism. The same 16-segment meter sensor is used to evaluate the preflash as is used for normal exposure (though it appears that for flash exposure the whole frame is used...
Posted by MattMatic on 30/07/2009 - 11:57
Pentax Bounce Flash AF22OT TTL 645+AF
Well, you can either pay out for a P-TTL one (like the current Pentax ones, or the Samsung or Sigma equivalents), or get yourself a cheap manual one to get yourself started. I use one of and it does me fine, even when the in trickier situations - it only takes a couple of test shots to sort you...
Posted by George Lazarette on 14/07/2007 - 07:53
Thoroughly confused about PTTL & wireless
Good idea on the lens issue. Just read another thread on something about that yesterday. Anyway, I was using my old SMC Pentax-FA 1:14 50mm lens. switched to the new kit 18-55mm and have the same results. OK some further observations... When the 360 on camera is in master mode it fully take...
Posted by amoringello on 14/07/2007 - 17:24
Thoroughly confused about PTTL & wireless
I generally have been shooting the remote flash through a brolly. I thought I had mentioned that in my initial post but I see after all the copy/paste and re-writes that I left that out. (stupid!) Although honestly didn't think the flash needed to "see" the subject for PTTL. Could th...
Posted by confused on 14/07/2007 - 18:15
AF540FGZ on a Pentax MX
Might be able to check somehow... That'd be great! all Pentax bodies, AF or not, are capable of controlling all non-F flashes non-F.... this doesn't refer to the F in FGZ does it? Yes. But the point is that it means that even a body like the MX can handle a flashgun with two additional contact...
Posted by George Lazarette on 24/07/2007 - 08:28
Why does my 540 flash under expose???!!!
One possibility is that you simply aren't outputting sufficient power for the conditions. Don't forget that diffusers cut the light output quite considerably, and if you are using a smallish aperture there may not be enough power. G To give you a rough idea of this BlueWhistle, the 540 has a gui...
Posted by LiamD on 25/07/2007 - 10:05
Pentax AF330 FTZ Flash unit
SIGMA FLASH EF-500 DG ST PTTL Would be ok then. Allegedly so. But it would be worth having a good search here - there have been lots of threads recently about which flash to choose for the K100D and K10D. I am still trying to get my head around all this PTTL and TTL stuff. P-TTL is simply wher...
Posted by ChrisA on 10/08/2007 - 08:10
bowens gemini espirit 500 with K10d flash sync
I have Bowens heads and one of those 'one of those cheap chinee radio thingies' and yes there is very occasionally a slight delay in firing the shutter resulting in that black band. The solution is either to shoot at 125 or buy a pair of Bowens Pulsar triggers; shooting at 125 is much cheaper. I'm s...
Posted by gartmore on 26/01/2012 - 09:05
K10D & AF-360FGZ v *istDS & AF400FTZ
In my experience (which isn't huge), I find that it's horses-for-courses. Each system has its strengths and weaknesses. Adding "old" TTL to the K10D is not possible, AFAIK, as it lacks the internal sensor to do the metering. Whether it would even work is doubtful - as the reflectance off ...
Posted by MattMatic on 28/08/2007 - 20:42
Another flash question?
George when you say i will need to use my on camera flash to trigger it does that mean i will be firing both flashes at once??? thanks Yes. Assuming it has a slave sensor, or you add one. The alternative, as I said, is a hotshoe-pc adapter and cable. G
Posted by George Lazarette on 04/09/2007 - 12:02
Manual flashgun recommendation
For fans of Strobist, and for those who don't get on with P-TTL, here is a suggestion. Strobist recommends Nikon SB-28 guns, and their predecessors, because they are powerful, have full manual control, and can be triggered by PC cord. Well, Pentax has something similar, and nowadays it can be ...
Posted by George Lazarette on 13/09/2007 - 12:36
Pentax Xtra Flash
It's very weak. You'd be better off getting a second-hand third-party flashgun with a built-in sensor. G
Posted by George Lazarette on 12/10/2007 - 20:29
Pentax Xtra Flash
It's very weak. You'd be better off getting a second-hand third-party flashgun with a built-in sensor. Guide number about 11, it would seem, from the instruction sheet. I'm playing with one at the moment, providing some back light in conjunction with my Samsung 540 in manual mode. This ha...
Posted by ChrisA on 13/10/2007 - 00:15
Pentax Xtra Flash
It's very weak. You'd be better off getting a second-hand third-party flashgun with a built-in sensor. Guide number about 11, it would seem, from the instruction sheet. I'm playing with one at the moment, providing some back light in conjunction with my Samsung 540 in manual mode. This ha...
Posted by George Lazarette on 13/10/2007 - 14:53
Nissin 360TW with k100d
This flash can definitely only be used in manual mode on the K10D. It has three output levels - full, half and quarter power, and a sensor so that it will, hopefully, expose correctly when used as fill flash in auto mode. It's not a bad little flash, but my recommendation is to scour Ebay unti...
Posted by George Lazarette on 18/10/2007 - 10:22
AF 360FGZ Flash speed sync question
High speed sync works by taking multiple flashes at different points in the shutter cycle. The more I think about HSS, the more it boggles my mind. The K10D has a flash sync speed of 1/180, and with HSS it can sync all the way up to 1/4000, AIUI. At a shutter speed of 1/4000, presumably the gap...
Posted by ChrisA on 02/11/2007 - 12:16
AF 360FGZ Flash speed sync question
If the shutter speed is 1/4000 than the exposure simply can't last 1/180s or am I wrong? But anyway it seems to be correct that the flash should 'flash' at least 20x so that the whole frame is properly exposed. Any other ideas, links? You are mixing things up. You can either take a conventional f...
Posted by George Lazarette on 02/11/2007 - 12:58
