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06-04-2008, 05:39 PM   #16
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Mine's the 360b, basically the same but black I think the optics are the same. When they made the 360b they had an autofocus version and quit making the 140f tc so in their infinite wisdom they had a tailpeice that stuck out the back too far for the old tc to fit so you would have to buy the new 1.4x tc -I trimmed the tube the 3/16" it needed so I could use the old type on mine.

06-04-2008, 05:42 PM   #17
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QuoteOriginally posted by TimB Quote
I'm a little confused ... How does a TC make a manual focus lens into an autofocus lens?
Am I missing something?
Ahhh the old pentax 1.7x autofocus adapter trick. No longer made and will cost a bit, but it is really cool. Get the focus close and it does the rest.
06-04-2008, 06:10 PM   #18
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QuoteOriginally posted by borno Quote
Ahhh the old pentax 1.7x autofocus adapter trick. No longer made and will cost a bit, but it is really cool. Get the focus close and it does the rest.
Oh... You mean the lens focus doesn't actually change. But the TC has some play to get the overall lens+TC focus right.

Or am I again missing something?
06-04-2008, 06:28 PM   #19
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QuoteOriginally posted by TimB Quote
Oh... You mean the lens focus doesn't actually change. But the TC has some play to get the overall lens+TC focus right.

Or am I again missing something?

Using the typical Pentax screw drive, The 1.7x AF teleconverter elements move back and forth relative to the focus plane -- focusing the incoming image light from the manual lens -- assuming the image is 'roughly' focused.

F 1.7X AF

06-04-2008, 07:00 PM   #20
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QuoteOriginally posted by konraDarnok Quote
Using the typical Pentax screw drive, The 1.7x AF teleconverter elements move back and forth relative to the focus plane -- focusing the incoming image light from the manual lens -- assuming the image is 'roughly' focused.

F 1.7X AF
I just bought one of those from a member here. (brand new) for $430.00 and it is worth every penny. The image quality is very good. Every wildlife Pentaxian needs to have one of these.
06-04-2008, 07:17 PM   #21
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QuoteOriginally posted by konraDarnok Quote
Using the typical Pentax screw drive, The 1.7x AF teleconverter elements move back and forth relative to the focus plane -- focusing the incoming image light from the manual lens -- assuming the image is 'roughly' focused.

F 1.7X AF
Aaahhh ... So it's done by magic. Got it.

Now, if I could only score myself one of those for a quick $20, my MF lenses, that don't get nearly enough love, will finally see some daylight.
06-04-2008, 07:21 PM   #22
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Check with Frank.
PentaxForums.com - View Profile: frank
He maybe able to get another one.
06-04-2008, 10:08 PM   #23
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QuoteOriginally posted by jgredline Quote
Check with Frank.
PentaxForums.com - View Profile: frank
He maybe able to get another one.
Does frank have some kind of time travel machine that allows him to go back in time and purchase Pentax products that we all wished we had but can't get anymore?

In that case, an auto-focusing TC just doesn't sound as cool anymore; although, still very useful.

06-05-2008, 03:55 AM   #24
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QuoteOriginally posted by TimB Quote
Now, if I could only score myself one of those for a quick $20, my MF lenses, that don't get nearly enough love, will finally see some daylight.
Will be more like a quick 300 USD now... Nevertheless a uniquie piece, which adds real value to older lenses and it works as a very good 1.7x tc even with AF lenses, too.

Ben
06-07-2008, 07:06 AM   #25
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a couple more

Took out the tamron the other day and got a couple more I thought I'd share: this one with the 1.7x afa and the super at f11

and the second with no tc, I was able to get pretty close to this guy a couple of times
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06-07-2008, 07:47 AM   #26
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QuoteOriginally posted by borno Quote
Took out the tamron the other day and got a couple more I thought I'd share: this one with the 1.7x afa and the super at f11

and the second with no tc, I was able to get pretty close to this guy a couple of times
Great captures and great colors and simply great! as always I might add...I can sure appreciate these types of images. Nice.
06-07-2008, 04:35 PM   #27
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Great shots!

I actually just bought this lens (360B) and the 1.7x AF converter, and everyones pictures are making me impatient as I wait for them to arrive!
06-09-2008, 05:12 PM   #28
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2 from today

2 from today

Last edited by konraDarnok; 06-24-2008 at 01:12 PM.
06-09-2008, 06:31 PM   #29
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Very nice Indigo Bunting is cool, I rarely see one those
06-10-2008, 10:32 AM   #30
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QuoteQuote:

I think the most recent autofocus version of this lens was never made in Pentax mount (

Wrong, I have the Model 60EP #100006, AF version in some greyish look in Pentax mount. Great lens.
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