Roy C
Occasional bird snapper
Kenko Pro arrived today so I have tried some quick tests to compare against my Canon Converter. All tests were done using a 30D camera and 400mm f5.6 Canon lens. The pics were all shot in RAW with no processing whatsoever except converting to jpeg and resizing in CS2. Both sets of shots were taken with a few minutes of each other. All shot were taken with spot metering and single shot AF mode selected and central focus point only. I realise this is not a technical test but hopefully it gives some indication.
AF Test
For this test I hand held the combo and from the same position tried focusing on about 20 different objects which were at a range of between 5 and 100 metres. For most of the objects the AF locked on very quickly. A few took a little while with some mild ‘hunting’ before AF was achieved and one object in particular (a pottery flower pot) would not AF at all. I found both converters to be identical in their AF ability, the objects that locked right on with one converter did the same on the other converter. Those object that took a little longer to lock-on with a little hunting was again the same for both converters and the couple of objects that would not AF with one converter did not AF with the other converter also.
Optical Quality
For this quick test I set-up a sturdy tripod and fired off three images of a chimney stack with each converter. Below is the best pic from the three for each tc but to be honest for each tc there was nothing to choose between the three pics.
The first set are full frame shots resized in CS2 and the second pair are 100% crops of those images. In both cases the Canon is the first image and Kenko the second.
I will leave you to judge which one is best but I reckon the Canon is noticeable better in the cropped shots.
P.S. I notice the Canon shot was 1/640 sec and the Kenko was 1/500 sec not sure what influence this would have had.
It should be noted that the Kenko pro is less than half the price of the Canon.
I paid £51 + £18 P& P for the Kenko (ordered on the web from Hong Kong on Sunday evening and arrived on my doorstep Thursday morning!).
There are two more 100% crops from the same images on the next post.
AF Test
For this test I hand held the combo and from the same position tried focusing on about 20 different objects which were at a range of between 5 and 100 metres. For most of the objects the AF locked on very quickly. A few took a little while with some mild ‘hunting’ before AF was achieved and one object in particular (a pottery flower pot) would not AF at all. I found both converters to be identical in their AF ability, the objects that locked right on with one converter did the same on the other converter. Those object that took a little longer to lock-on with a little hunting was again the same for both converters and the couple of objects that would not AF with one converter did not AF with the other converter also.
Optical Quality
For this quick test I set-up a sturdy tripod and fired off three images of a chimney stack with each converter. Below is the best pic from the three for each tc but to be honest for each tc there was nothing to choose between the three pics.
The first set are full frame shots resized in CS2 and the second pair are 100% crops of those images. In both cases the Canon is the first image and Kenko the second.
I will leave you to judge which one is best but I reckon the Canon is noticeable better in the cropped shots.
P.S. I notice the Canon shot was 1/640 sec and the Kenko was 1/500 sec not sure what influence this would have had.
It should be noted that the Kenko pro is less than half the price of the Canon.
I paid £51 + £18 P& P for the Kenko (ordered on the web from Hong Kong on Sunday evening and arrived on my doorstep Thursday morning!).
There are two more 100% crops from the same images on the next post.
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