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01-08-2015, 01:00 PM   #1
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pentax k3 sensor broke?

Hi guys,
sorry for this answer but i'm very beginner

I've just try my new trigger radio Phottix Atlas II with my K3 and Metz 52 and for my mistake i shoot a photo in high ISO level with the flash active

(35mm - f3.2 - 1/20sec - ISO 1600)

Do you think there has been damage to the sensor?

Many thanks



01-08-2015, 01:01 PM   #2
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There should not be any damages on the sensor because of a flash . The image is just overexposed - too much light. you need to compensate by changing your shutter speed/aperture/iso to keep light in check and bring levels back to normal.
Try and take a normal picture without flash and see the results for yourself.
01-08-2015, 01:30 PM   #3
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No damage to the sensor at all. I do this all the time!

Benvenuto, e ciao a Vicenza! Ho lavorato per molti anni (vicino la Fiera). Bevuto al HAMC (via del Commercio, 15)... and sorry for my poor Italian after so long away.
01-08-2015, 01:42 PM   #4
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QuoteOriginally posted by panoguy Quote
No damage to the sensor at all. I do this all the time!

Benvenuto, e ciao a Vicenza! Ho lavorato per molti anni (vicino la Fiera). Bevuto al HAMC (via del Commercio, 15)... and sorry for my poor Italian after so long away.
Ohhh The world is very small

Many thanks for your reply

01-08-2015, 02:14 PM   #5
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If you turn the ISO down from 1600 to 200-400 I'm sure you'd notice a huge improvement.
01-08-2015, 03:10 PM   #6
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If I understand flash correctly, you should preferably use it with iso 100.

I read that the guide number of the built in flash is 13(meters) which means you divide your aperture number with 13 to get the correct distance.

That is if I understood it correctly.

When we use flash with the k3 our shutter is synced to a max speed of 1/180. Any speed up to this will have the same exposure.

I'm currently learning about flash myself.

The most important thing I've read about flash is 3 points to follow

-aperture determines light entered.
The smaller the aperture (higher f number) the closer you have to be.
Iso 100 is generally all that is needed.

The distance to your subject determines how powerful your flash is.

if I'm wrong with what I said, feel free to correct me.
01-08-2015, 09:42 PM   #7
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QuoteOriginally posted by CNunez Quote
-aperture determines light entered. The smaller the aperture (higher f number) the closer you have to be. Iso 100 is generally all that is needed. The distance to your subject determines how powerful your flash is.


I'm not a big flash user myself, but if I recall correctly, I believe it's:
Aperture controls flash exposure while your shutter speed controls the ambient light mix.


As you close your aperture, you need to either move the flash closer, or raise the power to get equivalent exposures.


The distance of the flash to the subject changes it's power/brightness on a subject.



Perhaps someone more familiar with flash photography will chime in.
01-09-2015, 04:10 AM - 1 Like   #8
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Certainly there isn't any damage done to your sensor.

When shooting flash, I usually set my iso to 800 or so and bounce the flash. It is nice, because it allows ambient light in, as well as letting the flash light your subject. If you shoot at iso 100, I find you tend to get a well lit subject standing in a dark hole.

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