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03-05-2013, 10:58 PM   #1
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Philips Flash 25CB

I just encountered with Philips Flash 25CB for Pentax mount. Its a thyrister type auto flash with a 90 degree bounce able head. I have done massive search on internet for any user guide or user manual but couldn't found.

Thanks in advance for any generous response.

03-06-2013, 12:14 AM   #2
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Never saw one of those before, it has an odd calculator on the back, do the outside and inside circles both turn?
http://www.fotos-fotoheray.de//ebay/131120108647.jpg

Before mounting it on the camera, have you checked to make sure the trigger voltage is safe?

Last edited by elliott; 03-06-2013 at 12:21 AM.
03-06-2013, 12:59 AM   #3
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QuoteOriginally posted by elliott Quote
Never saw one of those before, it has an odd calculator on the back, do the outside and inside circles both turn?
http://www.fotos-fotoheray.de//ebay/131120108647.jpg

Before mounting it on the camera, have you checked to make sure the trigger voltage is safe?
I didn't get a chance so far to check its hot shoe voltages but surely i shall before mounting it on my camera. It was installed on a Pentax SF7 camera.
03-06-2013, 10:25 AM   #4
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Assuming the voltage is safe....

- Attach the flash to the camera.
- Camera: mode M (or X), shutter speed: 1/180 sec or lower.
- Set the flash to one of the three auto modes; let's use the middle (orange) for now. I think the selector switch is in front, below the light sensor (little hole under the lens).
- Match the ISO setting on the flash with the ISO setting on the camera.
- Set the aperture on the camera as the value indicated by the flash.
- Shoot.
- Check histogram. Adjust ISO setting and/or aperture setting on the camera to correct over/under exposure, if any.

You don't really need a manual. There's not much to it.

03-07-2013, 03:23 AM   #5
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QuoteOriginally posted by SOldBear Quote
Assuming the voltage is safe....

- Attach the flash to the camera.
- Camera: mode M (or X), shutter speed: 1/180 sec or lower.
- Set the flash to one of the three auto modes; let's use the middle (orange) for now. I think the selector switch is in front, below the light sensor (little hole under the lens).
- Match the ISO setting on the flash with the ISO setting on the camera.
- Set the aperture on the camera as the value indicated by the flash.
- Shoot.
- Check histogram. Adjust ISO setting and/or aperture setting on the camera to correct over/under exposure, if any.

You don't really need a manual. There's not much to it.
Just got hand on flash. Its hot shoe voltages read 150VDC. I think i can not use it on my Pentax K-r DSLR. It took almost 6 seconds to recharge with a whistling scary sound.
03-16-2020, 12:40 PM   #6
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I found the user manual in an old camera bag

Philips Flash 25 CB Manual - Album on Imgur
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