AF Adapter

I have been using Pentax cameras since 1987. Now I have a Pentax K20 D. I have some excellent lenses, all of them between 15-20 years old. I still use them. Lately I learned that Pentax made a teleconverter and an AF adapter which makes the old lenses autofocusing: "SMC Pentax-F 1.7 AF Adapter" I beleive Pentax launched it in 1991.

Can anyone give me information about this adapter:

1. Is it useful?
2. Where can I buy it?
3. How much does it cost?

Thank you

Nurkuti

1. yes
2. Ebay is your best bet
3. Around £180/200.

I dont have one but I believe you have to get the lens somewhere near focus before the TC will do its stuff.

I don't have one either but if the price wasn't so high I would buy one! They are supposed to be very good. You set the manual lens focus to infinity and off you go.
There is a guy on ebay in china selling 7 "new" as in mint, unused, boxed, unsold stock foom Japan at £230 each. Tempting, as used ones go for anywhere between £150 -£200.
I'll wait to see if the new x1.4 SDM version does the same thing first though, if they ever pull their finger out and release it.
Right now a good ultra wide is top of my wish list though,when funds permit. (Hopefully the Tokina 11-16 2.8 in Pentax DA* livery, pleasssseeeeee Pentax!)

nurkuti. I had a 1.7x and it served me well when I used some old MF lenses. I sold it to Beginner recently so ask him how he likes it.
MarkD Why not try the Sigma 10-20 I got one and its really good. CHEERS Vic.

Nurkuti,
I have been looking around for the lens you are talking about, but I cant find it on the internet. On Saturday, I will be going to my dealer to see about my new K20 and will also ask whether they can order it for me.
I will let you know.
ckursunlu

Or the Pentax 12-24mm.....

I bought one secondhand several years ago, and I've found it an excellent tool. Set it infinity, and all is well. You need a lens faster than f3.5, though