Hi William! I didn't realized that it is that easy.
These manual extension tubes are metallic hollow tubes with K-type bayonet male at one end and female at other end. I didn't noticed any aperture linkage at all. The tubes are meant for extending the lens from the body, that's all. I have to test the procedure that you have mentioned for making an exposure. Many thanks. With regards, Ayash. On Mon, 21 Jan 2002, Peifer, William [OCDUS] wrote: > 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 .
