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Old Jan 9, 2007, 12:47 PM   #1
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Took this this morning with the AF 1.7 on my 200mm lens just for a test for those that are interested.



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Old Jan 9, 2007, 7:57 PM   #2
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Not much to test anyway. A current one is about $370 with one day to go with 20K people bidding . That speaks all. Hope Sigma or Tamron is listening . Or better still Pentax

Daniel
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Old Jan 10, 2007, 12:16 AM   #3
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If I had the money I could buyone new from Scandinavian Photo for 1 895 SEK, equiv 270 USD. Are they not available in the US or Canada? Or is it only ebay fever?

Kjell
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Old Jan 10, 2007, 12:25 AM   #4
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So many people purchased Pentax cameras lately that things like the AF 1.7 that are no longer made are out of control price wise.

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Old Jan 10, 2007, 12:26 AM   #5
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Looks pretty dang sharp to me. Why is the Pentax 1.7 so expensive compared to Tamron, Sigma, and Kenko? Are the others just rubbish?
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Old Jan 10, 2007, 2:21 AM   #6
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I believe it is the only one that makes a MF lens AF!

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Old Jan 10, 2007, 7:41 AM   #7
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nice test, but why does the exif say 300mm instead of 340mm if on a 200mm lens??

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Old Jan 10, 2007, 9:14 AM   #8
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royce10 wrote:
Quote:
Looks pretty dang sharp to me. Why is the Pentax 1.7 so expensive compared to Tamron, Sigma, and Kenko? Are the others just rubbish?
It is the only one that turns any A or A* lens into an autofocus one.
I was trying that out yesterday for a short time on my A*300MF4. It did turn that into an autofocus one. The combination of it with the TC at wide open at F4 was shown at F5.6.
Unlike the other TC, this adapter does the focusing itself instead of relying on the lens itself to focus. It was funny with the AF focusing , I could also turn my focusing ring as well. I did not have all the time to test it out though
Imagine the potential of it on any A or A* lens (longer than 50mm) . Say A*85mm1.4, A*135mm1.8, A*200mm F2.8.a*300mmF2.8.... or any A* lens. The permutation is limitless. And its supply, well, is less than hens' teeth let me say that.
I hope some Sigma or Tokin or Kenko or better stil Pentax guys can hear this.
As you can see below, very simple design.

Daniel

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Old Jan 10, 2007, 11:45 AM   #9
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robar wrote:
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nice test, but why does the exif say 300mm instead of 340mm if on a 200mm lens??

roy
I don't know why my verison of CS2 does that with the EXIF data, but with non AF lenses it doesn't seem to be able to get the focal length correct. I used my A* 200mm 2.8 lens with the adapter for the sample photo, but still it claims it is 300mm for the combo.

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Old Jan 10, 2007, 12:50 PM   #10
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oops
double post
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