Sorry Ken...Getting a bit old...cannot remember the exact price. It was fairly good if I recalled maybe 20K Yen (est). It was pointed out by another pentaxian (who I also cannot remember) in a thread here some months back . Darn memory is really failing.
Tried it with manual lens K300f4 and also K55f1.8. Even tried it with DA55-300mm. It worked for this lens.
The Pentax 1.7x TC works on any K mount lens and works best with F/4.5 or faster lens. It works with DA*300, however there is no screw drive AF and SDM. Just switch the lens to MF, do a MF to focus close on the subject, half press shutter and the Pentax 1.7x TC will do the focus on the subject.
Sorry Ken...Getting a bit old...cannot remember the exact price. It was fairly good if I recalled maybe 20K Yen (est). It was pointed out by another pentaxian (who I also cannot remember) in a thread here some months back . Darn memory is really failing.
Tried it with manual lens K300f4 and also K55f1.8. Even tried it with DA55-300mm. It worked for this lens.
Thanks snapnut for the link. It's very helpful.
The pics posted by pinholecam shows that the diff in IQA is not really much, quite good.
Really envy you guys for getting so cheap.
From the thread, the kenko 1.5x is another good alternative.
NO! The Pentax 1.7x TC does not pass the AF to the lens. This Pentax 1.7x TC have moving elements so when you half press the shutter button, the lens elements in the TC moves to focus on the subject. Unless you shoot at infinity or else for closer distance you need to turn the distance ring on the lens nearer to the subject for the TC to enagage focus.
When coupled with the TC, the 300mm f/4 lens becomes a 510mm f/6.7 lens and you need to manually input the focal length for SR in the menu. Since the menu don't have 510mm focal length, just set to 500mm in the menu.