Re: to PZ1-P experts. About TTL Flash
On question three, just be aware of, when using the exposure compensation system (on the back of the camera), this will, as normal is, change the cameras "knowledge" about the film ISO speed. As a result, both ambient light and flash illumination are reduced or increased respectively. The only way to compensate both independently, is to use the HyM mode and read the over/underexposure bar in the viewfinder (only PZ1p, not the non-p), and use the dedicated flash compensation menu for the flash. However, this is a very powerful combination, one that I really enjoy on this body! Arnie - Original Message - From: "O'Neill, William" William.O'[EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, April 17, 2001 7:57 PM Subject: RE: to PZ1-P experts. About TTL Flash Alex, Question: 1. Is the TTL flash metering region the same as the light metering? Let me explain: if I set the exposure metering to multi-segment, will the TTL flash use the same metering mode to decide the flash exposure or will it use only spot, or something else? Answer: It is not the same. It uses an OTF sensor that provides a centre-weighted reading. This reading is not the same as the centre-weighted reading for normal exposure either. Question: 2. If I set PF-7 to program the IF button to set the exposure to the background, which metering mode will it use? Let me explain again: I set the metering exposure to spot and I pop up the flash but I would like to have the proper exposure for background. So, as I set PF-7 to do that, I press IF button. What happens? Does it shift to multi-segment to have the proper exposure for background or does it use the spot metering I choose for correction without change the flash configuration or something else Answer: This is just my hypothesis and you will have to check it out...Since the flash exposure is calculated real-time using a different sensor, it cannot be used to determine the ambient background exposure. Likewise, the multi-segment (ambient) meter cannot measure background lighting if it is in spot mode, so for things to be consistent the multi-segment meter will have to switch into multi-segment mode to determine the background exposure when you press the IF button. However, check it out. Question: 3. I am using fill flash. So, I set the exposure for background and I would like to program de flash to fill a subject that is not in the centre spot. How can I do that without change the exposure for the background Is it possible with the camera metering only? Answer: Since the ambient and flash exposure are handled in the PZ1-p by two completely separate systems. In this particular case, if I were using slide film I would set the ambient exposure compensation to -0.5 and the flash exposure compensation to about -1 and bracket a bit on the flash compensation. For print film I would not bother to bracket as a little over exposure will do not harm. Bill O'Neill - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
Re: to PZ1-P experts. About TTL Flash
"Alexandre A. P. Suaide" wrote: Hello, I am trying to understand some features PZ1-P provides about TTL flash metering and I would like to ask some questions to the PZ-1P experts: 1. Is the TTL flash metering region the same as the light metering? Let me explain: if I set the exposure metering to multi-segment, will the TTL flash use the same metering mode to decide the flash exposure or will it use only spot, or something else? Flash metering is an entirely separate system, using a center-weighted sensor measuring illumnation on the actual film. 2. If I set PF-7 to program the IF button to set the exposure to the background, which metering mode will it use? Let me explain again: I set the metering exposure to spot and I pop up the flash but I would like to have the proper exposure for background. So, as I set PF-7 to do that, I press IF button. What happens? Does it shift to multi-segment to have the proper exposure for background or does it use the spot metering I choose for correction without change the flash configuration or something else It will meter exactly as it would if you didn't have the flash up. If you are set to spot metering, it will use spot metering. If you are set to multi-segment, it will use multi-segment metering. 3. I am using fill flash. So, I set the exposure for background and I would like to program de flash to fill a subject that is not in the center spot. How can I do that without change the exposure for the background Is it possible with the camera metering only? Again, the flash metering is center-weighted. If you know that the item that will be illuminated by the flash is far enough off- center that it will be reduced in significance by the flash metering, you want to adjust the flash balance. you can do this by setting the flash exposure compensation (a Pentax Function). -- John Francis [EMAIL PROTECTED] Silicon Graphics, Inc. (650)933-82952011 N. Shoreline Blvd. MS 43U-991 (650)932-0828 (Fax) Mountain View, CA 94043-1389 Hello. My name is Darth Vader. I am your father. Prepare to die. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
RE: to PZ1-P experts. About TTL Flash
Alex, Question: 1. Is the TTL flash metering region the same as the light metering? Let me explain: if I set the exposure metering to multi-segment, will the TTL flash use the same metering mode to decide the flash exposure or will it use only spot, or something else? Answer: It is not the same. It uses an OTF sensor that provides a centre-weighted reading. This reading is not the same as the centre-weighted reading for normal exposure either. Question: 2. If I set PF-7 to program the IF button to set the exposure to the background, which metering mode will it use? Let me explain again: I set the metering exposure to spot and I pop up the flash but I would like to have the proper exposure for background. So, as I set PF-7 to do that, I press IF button. What happens? Does it shift to multi-segment to have the proper exposure for background or does it use the spot metering I choose for correction without change the flash configuration or something else Answer: This is just my hypothesis and you will have to check it out...Since the flash exposure is calculated real-time using a different sensor, it cannot be used to determine the ambient background exposure. Likewise, the multi-segment (ambient) meter cannot measure background lighting if it is in spot mode, so for things to be consistent the multi-segment meter will have to switch into multi-segment mode to determine the background exposure when you press the IF button. However, check it out. Question: 3. I am using fill flash. So, I set the exposure for background and I would like to program de flash to fill a subject that is not in the centre spot. How can I do that without change the exposure for the background Is it possible with the camera metering only? Answer: Since the ambient and flash exposure are handled in the PZ1-p by two completely separate systems. In this particular case, if I were using slide film I would set the ambient exposure compensation to -0.5 and the flash exposure compensation to about -1 and bracket a bit on the flash compensation. For print film I would not bother to bracket as a little over exposure will do not harm. Bill O'Neill - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
