Yep. It's best to check that screw now and then. The tripod mount is very sturdy but the screw has to be tight. I tighten it with a flat blade screwdriver. Doing it by hand is inadequate.
Paul via phone > On Sep 9, 2016, at 4:47 PM, Igor PDML-StR <pdml...@komkon.org> wrote: > > > Stan, > > Sorry to hear about that. > > Just two weekends ago, I was photographing an ice-skating performance with > the 60-250, staying at the top level of the bleechers. > Then I hear a having piece falling down, bouncing from the concrete floor. > (Fortunately, nobody was right below me, and my little daughter was about a > foot to the side.) > It was the tripod mount from the lens. > I've never untightened it from the lens. And this time it came off by itself. > (Actually, I've never looked at it, and if asked, from the memory, I would > probably say that it cannot be detached easily, but if the screw is loosened, > the collar can be rotated.) > > I thought I was lucky it wasn't while I was holding the lense by the collar. > > Igor > > >> On Sep 9, 2016, at 3:04 PM, Stanley Halpin wrote: >> >> >> In my recent listing of items soon to be up for sale, I made a passing >> comment about the 70-200. >> >> The (Tamron?) Pentax DFA HD 70-200/2.8 is a big hefty lens that balances well >> on the K-1 body + grip. It has a detachable tripod mount. It produces >> wonderful mages. But… >> >> The metal bit on the back end of the lens that mates with the K-mount on the >> body is a thin plate about 1-1.5mm thick. That plate attaches to the back end >> of the lens via four small screws (just a little larger than the screws that >> hold the sidepieces on your eyeglasses). Those screws go into a hard plastic >> (not metal) portion of the lens construction. When one or more of those >> screws is loose or otherwise weakened, then the lens body will detach from >> the K-mount plate. Leaving the plate attached to the camera, the other 99% of >> the lens on the table or floor or ground. You needn’t ask how I know this. >> >> I like this lens and the images it produces, I like the versatility of this >> zoom range, I am not ready to give up on it. We’ll see what the verdict of >> the repair technician is. But I must say that I am a bit miffed that a >> 2-month-old $1800 lens should fall apart in the wilds of Alaska with no >> possible replacement. ( Off the grid, no way to order another or find a >> rental. Too close to the end off the trip, the timing was off, even if I had >> somehow smoke-signaled an emergency shout-out to B&H for a replacement with >> next day delivery, it would still have taken 3-4 days to get to me…) >> >> So anyway, for those of you with this lens, be careful. Don’t put undue >> pressure on the lens. Do use the lens tripod mount in lieu of mounting the >> body and letting the lens hang off. And watch for symptoms of impending >> disaster. Reflecting later, I realized that there were signs which I didn’t >> pay attention to. Specifically, there were times when the in-camera >> viewfinder display of F-stop etc. behaved as though I had an M-series lens >> mounted. I.e., no F-stop was displayed. Wiggling the lens a bit would correct >> the problem, and to the extent that I gave it any thought I figured I had >> dirty contacts. In retrospect, the mounting plate was probably coming loose >> and that was causing the display issue. Or maybe I had dirty contacts and >> this wasn’t symptomatic of an impending failure. I don’t know. >> >> I don’t abuse my camera equipment, but I also don’t treat my gear as though >> it were egg-shell delicate jewelry. It bugs me that I may not be able to >> trust this lens after it is repaired and I will probably trade up if/when >> Pentax offers a 70-200 in lieu of what is said to be a rebranded Tamron. >> >> stan >> -- > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
