Originally posted by AMBIVALENCE Question:
I have never see anyone posting pic of the type 2 adaptor on pentax forum, Anyone had ever tried the Type 2 adaptor? Is it the type that give the "stuck and have to turn 360 degree" ones? I am utterly confused right now, I know genuine is the best, but now i see this type, that look just like the original... So, might as well ask! right?
I am not sure why you state that this is a new type, these clones have been available for many years.
Three years ago I bought one made by Kood. After using it for a week I found that the adapter had become jammed in my K100D. It took me a while, but eventually I managed to get the lens and adapter out. The screw and leaf spring were inside the camera, but I got them out before they could do any damage. Now I use that adapter without the spring, but it does mean that the adapter can unscrew out of the K mount if I use a lens with a stiff focus. That adapter is now permanently on my Flektogon and I have drilled a hole for the lens release catch.
Since then I have bought a genuine Pentax adapter and a couple of other clones. I use the genuine adapter the most and I have <b>never</b> had any problem with the leaf spring coming off. In my opinion this is the best adapter to use.
The two clones I bought on eBay both arrived without the spring or the screw to attach it. Clearly the previous owners had had the same problem as me. One of them was a perfect copy of the Pentax adapter (I think it was a Kood adapter, but the paint has rubbed off) and that works fine as long as I have a hole drilled in the M42 lens to prevent it from unscrewing from the K mount.
The other clone adapter is unusable. The flanges are <i>slightly</i> smaller than the genuine article and consequently when inserted in the K mount it only just stops when screwed in. However, if I move the lens (eg using a stiff focus) the adapter turns a bit more in the mount and after that it is loose. As I said, it is unusable.
So, in my opinion the Kood adapter is a cheap alternative as long as you remove the spring and you take some steps to lock the lens to the body. The problem is determining from an eBay picture whether the adapter is a perfect copy, or the slightly-smaller-flange copy. If it is very cheap then you can afford to throw it away if it proves to be unusable.
By the way. There is one case when the genuine adapter does not work. I have a set of genuine Asahi M42 extension tubes and the shortest one when screwed into the genuine adapter does not screw in enough for the back face of the tube to come in contact with the K mount face. This contact is important because the friction keeps the tube firmly in place. This combination - genuine adapter and genuine #1 extension tube - means that the tube is not firmly in place and wobbles. I found that when I used the Kood adapter I could screw the tube in enough to get a contact between the tube and the K mount. (In fact I don't bother - I use a Practika M42 extension tube with the genuine adapter.)
Richard