Originally posted by pacerr I tried the 1.7x with my 360B and found that I spent more time manually verifying AF than if I simply used MF to begin with. That could just be my own old MF habits at work but I didn't find the AF function to be useful (for me) and consequently sold that TC to another member.
I DO like, and use, the manual focus Tamron Pz-AF 1.4x TC with the 180mm, 300mm and 80-200 (30A) SP lenses and occasionally use it as an extension with the 90 macro. It's equal to the Adaptall 140F converter and MUCH more convenient to use.
H2
Thanks for the information. I am just curious if the AFA works but I do know that I will be bothered by the back-and-forth between AF and MF as well. I used the AFA 1.7x a few times on a Photosniper Tair 3 Phs
and that 300mm lens is very difficult lens to use as there is cocking step to stop down the aperture for focusing and I can only shoot single shot after the cocking.
Though all the odds, the AFA actually works with the M42 mount lens to get partial AF but the caveat comes into the requirement to MF to close proximity of the subject. Hence the sluggishness in overall usage.
with AFA 1.7x TC with AFA 1.7x TC with AFA 1.7x TC
I no longer have the Tamron 1.4x TC, I should have kept my wonderful copy. My current long lens combo is using the 1.7x TC with Pentax F* 300mm f/4.5. The F* 300 is smaller and much easier to hand-hold than the Photosniper. The toilet plunger like lens hood and all the oddity of the russian lens are kept in its original metal box for bragging rights. I hardly find the time and patience to use it -- a shame.
I do get tempted by the 360B in faster speed and I do wish Dave or H2 live next door to me so that I can get a sense of the lens in person.
Thanks,
Hin