Hi Ayash, I'm assuming that your extension tubes have the linkage for open-aperture metering, but that they will ~not~ transmit the position of the lens aperture ring to the body. If this is the case, then the LCD display will show "--" for the aperture setting of the lens. Even if this is not the case, I think the following advice will be correct.
First, set your camera to aperture priority and the lens aperture ring to wide open. Your meter on the MZ-M will then show the correct shutter speed for an exposure at f/1.7. If you want to shoot your subject at f/1.7, then the shutter speed that the body just determined is correct. Start shooting! However, if you want to shoot your subject at a slower aperture (e.g., f/11), then you will need to stop down the lens and make a longer exposure. This is probably best done by switching to manual mode. For instance, 1/250 sec at f/1.7 becomes 1/8 sec at f/11. That is, five-stop ~longer~ shutter speed and five-stop ~slower~ aperture. Hope this helps, Bill Peifer Rochester, NY > -----Original Message----- > From: Ayash Kanto Mukherjee [SMTP:[EMAIL PROTECTED]] > Sent: Monday, January 21, 2002 11:58 AM > To: [EMAIL PROTECTED] > Subject: Manual Extension Tubes! > > Hi! > > I have borrowed a 50 mm f/1.7 M-series from my friend. I want to use some > manual extension tubes with it to try out some macro shots. Can anybody > please tell me, how to do the metering before taking the shot? I am a user > of MZ-M. And above all > I want to know whether the use of manual extension tube hurt my camera? > > Thanks in advance. > > With regards, > Ayash. > - > 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 .
