Search results for 'sensor cleaning' - page 556
Manual lenses and flash
I'm using a K200D with manual lenses. The flash will not fire unless i set it on AUTO/REDEYE-the question is this-is this what they refer to as the pre-flash mode? I am using 'M' lenses at the moment.Flash is Metz AF36-4 -P-TTL Dedicated thanks Chris:D Hi Chris, Just looked at Metz websi...
Posted by Bob and his Pentax on 22/05/2009 - 16:08
Ring flash
Ring flashes are not cheap, and tend not to be very powerful - the light is diffused widely. If you are on a budget, I would suggest you buy a manual flash, either one with a built-in slave, or with a separate slave sensor. The flash could be cheap as chips. Put everything on manual, and experi...
Posted by George Lazarette on 09/07/2009 - 23:29
PTTL-HSS mode
In short it allows you to decrease ambient light using less flash power. It also helps reduce blur seen from ambient light tat might otherwise be frozen by flash. More explanation... It helps to understand a bit how the shutter works in these conditions... hopefully I do the expatiation some jus...
Posted by amoringello on 13/09/2009 - 17:46
PTTL-HSS mode
Just to add that since the flash is pulsed (to illuminate the sensor as the open strip of shutter proceeds) the total power of the flash is normally reduced by 50%. There is hardly any difference between 1/180 and 1/250. In fact, in some cases the Pentax has an advantage ;) e.g. the Nikon D700 ha...
Posted by MattMatic on 13/09/2009 - 20:05
PTTL-HSS mode
In short it allows you to decrease ambient light using less flash power. It also helps reduce blur seen from ambient light tat might otherwise be frozen by flash. More explanation... It helps to understand a bit how the shutter works in these conditions... hopefully I do the expatiation some jus...
Posted by PeteL on 27/09/2009 - 00:20
Pentax AF240Z on K20D
Have a look here, which will explain the differences. http://www.bdimitrov.de/kmp/technology/hot-shoe/index.html On the K20D, Program mode won't work, but Auto mode will, provided you set the camera body to Manual. In my experience, Auto mode works just as well as TTL and P-TTL. I did befor...
Posted by misiek_knm on 01/10/2009 - 21:06
Pentax AF240Z on K20D
The reason why the flash "knows" about the diffuser in A mode, is that the sensor on the flash is registering the amount of light which hits it (and which will also hit the sensor or film in the camera). Clearly, a diffuser will reduce the amount of light coming back to the flash sensor, so it wi...
Posted by George Lazarette on 02/10/2009 - 09:36
Pentax AF240Z on K20D
Michal, Slow and Trailing sync are related - they both work with slow shutter speeds. However, Trailing Curtain sync fires the flash at the end of the shutter (so it goes off just before the trailing curtain of the shutter closes). Normal slow sync will open the leading curtain then fire the flash....
Posted by MattMatic on 02/10/2009 - 10:32
Pentax AF240Z on K20D
Just an update on the "How does the camera know how much light" question: As George points out, the light sensor in the body of the flash unit measures the reflected light to judge how much light to release. If you put a diffuser, or bounce the flash, the "eye" of the flash still points towards t...
Posted by MattMatic on 02/10/2009 - 10:36
Pentax AF240Z on K20D
The reason why the flash "knows" about the diffuser in A mode, is that the sensor on the flash is registering the amount of light which hits it (and which will also hit the sensor or film in the camera). Clearly, a diffuser will reduce the amount of light coming back to the flash sensor, so it wi...
Posted by misiek_knm on 02/10/2009 - 23:06
Which flash for my K10
No, that's the point. If you are only going to use ONE flashgun, there is little point in having P-TTL. (In my view - others will no doubt disagree.) The two I mentioned have a built-in sensor which cuts the light when there's enough. So you have the advantage of exposure automation without...
Posted by George Lazarette on 18/10/2009 - 18:50
Cobra 700AF – is it safe?
Don't discount using it in manual mode. Mounted on the camera, it could trigger the remote 360. I can't recall if the 360's slave sensor works in manual mode, but a cheapo trigger from Ebay will soon cure that. Or perhaps the Cobra has a slave built-in. Using manual flash will teach you far mo...
Posted by George Lazarette on 14/10/2009 - 20:05
slaves !?
All the P-TTL flashes can work in slave mode, provided they are used with other P-TTL flashes and a compatible camera. Otherwise, only the AF-500FTZ has a built-in slave sensor which can be triggered by any flashgun (or by the camera's built-in flash). It is by far the best, most powerful, and m...
Posted by George Lazarette on 15/10/2009 - 09:36
slaves !?
All the P-TTL flashes can work in slave mode, provided they are used with other P-TTL flashes and a compatible camera. Otherwise, only the AF-500FTZ has a built-in slave sensor which can be triggered by any flashgun (or by the camera's built-in flash). It is by far the best, most powerful, and m...
Posted by stu49 on 15/10/2009 - 11:01
slaves !?
No. It is the 500 that has a slave sensor, not the 400T. The 400T is not designed to be used away from the camera. It is a hammerhead gun, with a bracket for the camera to sit on, and a short cable to connect it. But slave triggers are very cheap. I should go that route. G
Posted by George Lazarette on 15/10/2009 - 11:19
slaves !?
No. It is the 500 that has a slave sensor, not the 400T. The 400T is not designed to be used away from the camera. It is a hammerhead gun, with a bracket for the camera to sit on, and a short cable to connect it. But slave triggers are very cheap. I should go that route. G I meant the 500 ...
Posted by stu49 on 15/10/2009 - 11:25
Jessops 360AFD problem
Jessop claims that the 360AFD range are for digital camera's and have dedicated TTL, so it could be that it has P-TTL support. You could take a close look at the contacts on the flash and camera. I had some oxidation on the camera hotshoe so my new Metz didn't make contact very well at first. Aft...
Posted by golfdiesel on 29/11/2009 - 12:13
Flash advice requested
I prefer never to buy anything fully automatic, unless there is also a manual option. A Pentax flashgun is the best bet for a Pentax camera, but Metz is very good second-best, and often rather cheaper. If cash is a problem, there is nothing wrong with buying one of the old sensor-equipped guns...
Posted by George Lazarette on 18/11/2009 - 21:49
Flash advice requested
I have a Sunpak Auto Zoom 3600 which I have had for many years. It is a very well designed pro, or semi-pro, flash system with excellent characteristics and a good range of accessories to make it really useful in a wide range of applications. George is absolutely right about NEVER buying any ph...
Posted by viewfinder on 19/11/2009 - 09:57
Optical trigger !?
I setled on the Vivitar 283 as they are very cheap, plentiful and powerful. They need the VP1 varipower module to operate in a fully variable mode, this plugs in in front of the flash in place of the sensor. The range available is from full power down to about -5.5 stops. Unfortunately this mo...
Posted by digikid-tv on 19/11/2009 - 18:15
