jcolwell Online Upload & Sell: On
|
Yakim Peled wrote:
The Adorama lens states: Diaphragm Automatic. Is this a sign I should avoid it? The picture shows a manual aperture ring but the inscription below states: Not actual image.
I'm puzzled. My logic indicates that a cheap lens must be an old one but that note bugs me. I guess I'll have to call them.
Happy shooting,
Yakim.
Yes, you should call, just to be sure. While they're on the line, ask them to verify that the lens optics are clean and clear throughout, with no marks, rubs and/or other visible defects. Don't worry about some dust.
The manual focus versions of this and other M645 lenses do have an auto-aperture feature, and also a manual aperture control ring. There is an Auto/Manual switch on the lens. In Auto mode, you set the taking aperture by rotating the manual aperture ring to the desired stop, but the diaphragm does not stop down until just before the shutter fires - this is controlled by the camera, and is called auto-aperture mode (same as was introduced into teh SMC Pentax lineup with the -A series). With the Auto/Man switch in Man mode, the aperture stops down as you rotate the manual aperture ring.
The AF version of the lens has auto-aperture, but no manual aperture control on the lens - it's all done by teh camera, just like an EF lens on an EOS body.
Jim
|