altair
Member
Hi all.
I've just won this lens on eBay. It's reviewed here:
It arrived to me today. I mounted it on my Asahi Pentax KX, but noticed a problem. When changing to smaller apertures (from f/4 to f/16, say), the lens stops down immediately to the selected aperture. Hence, it's like stop-down metering, and the open-aperture metering of the PK system is gone. This is troubling because when it stops down, the image in the VF gets very dim..even at f/4 it's quite dim. I don't want to use this lens only at wide open aperture.
I then tried it on my ME Super..same problem occurs.
Has anyone had this sort of trouble with this lens?
I think I may have found a cause for it. Refer to the attached picture. Looking at the mount, I can see that the pin (I'm sorry but I don't know what it's called, it's the pin that opens up/stop down the lens when you move it) is present, but the 'tab' that's supposed to be near the pin is not there. What is the function of the 'tab'? And is it the culprit? If yes, why would anyone remove the 'tab'?
Would appreciate any input. Thanks in advance!
-Dani
P.S: And I think this lens might have the Ricoh pin..correct? Refer to the photo.
I've just won this lens on eBay. It's reviewed here:
It arrived to me today. I mounted it on my Asahi Pentax KX, but noticed a problem. When changing to smaller apertures (from f/4 to f/16, say), the lens stops down immediately to the selected aperture. Hence, it's like stop-down metering, and the open-aperture metering of the PK system is gone. This is troubling because when it stops down, the image in the VF gets very dim..even at f/4 it's quite dim. I don't want to use this lens only at wide open aperture.
I then tried it on my ME Super..same problem occurs.
Has anyone had this sort of trouble with this lens?
I think I may have found a cause for it. Refer to the attached picture. Looking at the mount, I can see that the pin (I'm sorry but I don't know what it's called, it's the pin that opens up/stop down the lens when you move it) is present, but the 'tab' that's supposed to be near the pin is not there. What is the function of the 'tab'? And is it the culprit? If yes, why would anyone remove the 'tab'?
Would appreciate any input. Thanks in advance!
-Dani
P.S: And I think this lens might have the Ricoh pin..correct? Refer to the photo.