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Old Apr 23, 2006, 11:23 AM   #1
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Here are two shots both with the same MF, A lens, but one with the 1.4X-S converter and the other with the 1.7AF converter. There was no sharpening at all on either photo.

1.7AF

1.4X-S

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Old Apr 23, 2006, 11:41 AM   #2
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Could you crop and show an enlarged detail, for instance the lower parts of the petals and a bit of the stem with the yellow spot that seems to be well in focus. I'm very interested in this, since I have the 2XS converter and have been thinking about the 1.7AF. From your samples here it seems difficult to explain the price difference (the non-AF converters being much more expensive).

Kjell
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Old Apr 23, 2006, 11:46 AM   #3
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In my experiance the 1.7AF converter is not quite the same quality as the 1.4X-S converter with most lenses, but does compare very well with high end lenses like the A* 85 1.4 used here.

I will do the crop a bit later after all the "Honey Do's" are finished today.

Tom
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Old Apr 23, 2006, 12:01 PM   #4
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Chores, chores... know how it feels at times.

Does the AF converter work well with AF lenses?

Kjell
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Old Apr 23, 2006, 12:29 PM   #5
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It seems to, but I really have not used it that much with AF lenses. The biggest issue I have the the AF converter is that is does not focus throughout the entire focus range and as things get closer you have to use the lens focus ring to bring things back into AF land.

The boss says I am slacking and I need to get back to project land!

Tom
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Old Apr 24, 2006, 4:37 PM   #6
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OK here are the enlargements of both photos:
I see some loss of contrast with the 1.7AF over the 1.4X-S.
1.7AF

1.4X-S

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Old Apr 24, 2006, 4:56 PM   #7
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OK, thanks Tom.

It certainly doesn't seem like a total waste of money to get the 1.7AF. Do you appreciate the AF function with manual lenses?

LBA, here we go again...



Kjell
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Old Apr 24, 2006, 5:19 PM   #8
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I is very fast with a fast lens like the A* 85 1.4, which is what I bought it for quite a while ago. I doesn't seem to be quite as sharp with my A* 200 2.8, but then that may be the fact that it then becomes a 340mm lens, which is more difficult to hold steady.

I find it to be not as apealing as a 1.7 converter as a AF adapter, so I only use it for that with manual lenses.

It is a good item to have in your bag, just so you don't have to pay too much for it, but then I don't know of any thing else that does the same job as it does.

Tom
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