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08-29-2018, 03:23 PM - 1 Like   #1
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Pentax AF Adapter!!!

Since this adapter is used for autofocusing on manual lenses. Does this mean, I can autofocus with LEITAXED lenses??? Also Pentax A 50mm f1.2 & Mitakon 85mm f1.2???

08-29-2018, 03:30 PM - 1 Like   #2
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Yes. Just remember that it also acts as a teleconverter.

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08-29-2018, 03:39 PM   #3
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I've not heard of this before is there links, pictures manual or description on how it works?

Ok are you talking about tele-converters?

Last edited by beachgardener; 08-29-2018 at 03:46 PM.
08-29-2018, 03:42 PM   #4
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Is the 1.7 still a new item? A lot of Japanese Ebay sellers claim to have it new. US dealers don't list it.

08-29-2018, 03:49 PM - 1 Like   #5
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QuoteOriginally posted by beachgardener Quote
I've not heard of this before is there links, pictures manual or description on how it works?

Ok are you talking about tele-converters?
Yes - the 1.7 AF teleconverter: SMC Pentax-F 1.7x AF Adapter Reviews - Pentax K-mount Teleconverters and Adapters - Pentax Lens Reviews & Lens Database

Once you get close to proper focus with the main lens, the 1.7 adjusts its own internal lenses to fine tune the focus, using the screw drive focus system of the camera.

I have one. It is rather nice in action.
08-29-2018, 03:49 PM   #6
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QuoteOriginally posted by Adam Quote
Yes. Just remember that it also acts as a teleconverter.
I don't mind at all! Better than buying separate teleconverter! And something is better than nothing!

---------- Post added 08-29-18 at 03:51 PM ----------

QuoteOriginally posted by beachgardener Quote
I've not heard of this before is there links, pictures manual or description on how it works?

Ok are you talking about tele-converters?
Search on Google it will direct you to the page on Pentax forum! But keep in mind they cost about 400$! You have been warned!

---------- Post added 08-29-18 at 03:52 PM ----------

QuoteOriginally posted by AstroDave Quote
Yes - the 1.7 AF teleconverter: SMC Pentax-F 1.7x AF Adapter Reviews - Pentax K-mount Teleconverters and Adapters - Pentax Lens Reviews & Lens Database

Once you get close to proper focus with the main lens, the 1.7 adjusts its own internal lenses to fine tune the focus, using the screw drive focus system of the camera.

I have one. It is rather nice in action.
How about the version ??? Is it good too???
08-29-2018, 05:12 PM   #7
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Is it true you cannot buy this in the US?
08-29-2018, 05:22 PM   #8
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The lens you put on it has to have a conductive base, so some adapted lenses might not work. (like most m42s) You can put foil tape on the lens to get around this, but that's a pain.

08-29-2018, 05:54 PM   #9
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The 1.7x TC has been discontinued for over a decade AFAIK. The DA one is the only current one.

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08-29-2018, 06:28 PM   #10
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I use this TC with my DA*300/4 lens ... works great, even better than with the HD 1.4X TC !
08-29-2018, 07:44 PM   #11
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QuoteOriginally posted by tomcook Quote
Is it true you cannot buy this in the US?
Yes you can!

---------- Post added 08-29-18 at 07:45 PM ----------

QuoteOriginally posted by Adam Quote
The 1.7x TC has been discontinued for over a decade AFAIK. The DA one is the only current one.
Is the DA good?

---------- Post added 08-29-18 at 07:45 PM ----------

QuoteOriginally posted by jpzk Quote
I use this TC with my DA*300/4 lens ... works great, even better than with the HD 1.4X TC !
Is it fast?
08-29-2018, 09:05 PM   #12
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QuoteOriginally posted by Adam Quote
The 1.7x TC has been discontinued for over a decade AFAIK. The DA one is the only current one.
The Japan website makes it look current.

This catalog was published May 2017. The 1.7x is listed on a page with 5 other TCs. The rest of the content makes the document look like currently available products rather than a historical reference. http://www.ricoh-imaging.co.jp/english/support/pdf/pentax_acc.pdf

The website even lists a price, 45900 yen. The link below is in Japanese, just put "1.7" into the search box near the top to find it. ???? | RICOH IMAGING

Estimated delivery date Sept 1, 2018. It's in stock but they won't ship outside Japan. F AF????? 1.7X: ??? | RICOH IMAGING
08-30-2018, 12:47 AM   #13
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QuoteOriginally posted by AstroDave Quote
Once you get close to proper focus with the main lens, the 1.7 adjusts its own internal lenses to fine tune the focus, using the screw drive focus system of the camera.I have one. It is rather nice in action.
Ok thanks for that, actually I have one of these, must try it out

---------- Post added 30-08-18 at 05:50 PM ----------

QuoteOriginally posted by SunnyG. Quote
Search on Google
sorry no, I don't use google anything, not my cup of tea, I could however search Ecosia

actually I have one of these, not thought to use it in this way before

Last edited by beachgardener; 08-30-2018 at 01:03 AM.
08-30-2018, 01:00 AM   #14
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I purchased new one from Japan, works great.
It was banned everywhelse ~ 10 years ago, I think the problem was to high % of lead in the glass.
08-30-2018, 04:04 AM   #15
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QuoteOriginally posted by DeadJohn Quote
The Japan website makes it look current.

This catalog was published May 2017. The 1.7x is listed on a page with 5 other TCs. The rest of the content makes the document look like currently available products rather than a historical reference. http://www.ricoh-imaging.co.jp/english/support/pdf/pentax_acc.pdf

The website even lists a price, 45900 yen. The link below is in Japanese, just put "1.7" into the search box near the top to find it. ???? | RICOH IMAGING

Estimated delivery date Sept 1, 2018. It's in stock but they won't ship outside Japan. F AF????? 1.7X: ??? | RICOH IMAGING
I guess the only way to buy it is through eBay!

---------- Post added 08-30-18 at 04:04 AM ----------

QuoteOriginally posted by i_trax Quote
I purchased new one from Japan, works great.
It was banned everywhelse ~ 10 years ago, I think the problem was to high % of lead in the glass.
I was wondering, how does the DA version works?

---------- Post added 08-30-18 at 04:05 AM ----------

QuoteOriginally posted by beachgardener Quote
Ok thanks for that, actually I have one of these, must try it out

---------- Post added 30-08-18 at 05:50 PM ----------



sorry no, I don't use google anything, not my cup of tea, I could however search Ecosia

actually I have one of these, not thought to use it in this way before
Let us know how it goes!
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